The complete statement is → At the summer solstice in the northern hemisphere, the sun travels longest path through the sky.
We have a statement regarding summer solstice in northern hemisphere.
We have to complete the statement using appropriate words.
What is Summer Solstice?A Solstice that marks the onset of summer. To be more precise, 21st June in northern hemisphere marks the summer solstice and 22nd December in southern hemisphere marks the Summer solstice.
According to the question, we have -
At the summer solstice in the northern hemisphere, the sun ____.
The given sentence can be completed as →
At the summer solstice in the northern hemisphere, the sun travels longest path through the sky.
On this day, there is more daylight. During the summer solstice in northern hemisphere, the north pole is shifted 23.4° toward the Sun which lasts until the autumnal equinox (September 22 or 23) where it ends.
Hence, the complete statement is → At the summer solstice in the northern hemisphere, the sun travels longest path through the sky.
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an open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?
Answer:
Fail-close
Explanation:
A failed open switch is a switching device (be it mechanical, relay, semiconductor) that has lost it's switching capabilities (it's defective) and the switched contacts are now constantly open (disconnected) regardless of the control signal to the switch.
Similarly a failed closed switch is the same just with the contacts connected through.
A race car is moving at 40.0 m/s around a circular racetrack of radius 265 m. calculate the period of the motion.
The race car that is moving at 40.0 m/s around a circular racetrack of radius 265 m has a period of motion of 41.63 s
To solve this tangential velocity problem the formula and the procedure we will use is:
v = (2 * π * r) / T
Where:
v = tangential velocityπ = mathematical constantr = radiusT = periodInformation about the problem:
v = 40.0 m/sπ = 3.1416r = 265 mT=?Applying the tangential velocity formula and isolating the period, we get:
v = (2 * π * r)/ T
T = (2 * π * r)/ v
T = (2 * 3.1416* 265 m) / 40.0 m/s
T = (1665.04 m) / 40.0 m/s
T = 41.63 s
What is tangential velocity?In physics is the length of arc traveled in each unit of time in uniform circular motion. It is expressed in units of distance per time (m/s), (km/h).
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A boy sledding down a hill accelerates at 1.25 m/s2. if he started from rest, in what distance would he reach a speed of 5.30 m/s?
By uniform motion, the distance traveled is 11.24 meters.
We need to know about the uniform motion to solve this problem. The uniform motion is the motion of an object which has acceleration applied. It can be determined as
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time interval and s is displacement.
From the question above, we know that:
a = 1.25 m/s²
vo = 0 m/s
vt = 5.3 m/s
By using the second equation, we can calculate the distance
vt² = vo² + 2a . s
5.3² = 0² + 2 . 1.25 . s
2.5s = 28.09
s = 11.24 m
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The layers in a high-mass star occur in order of:________
a. atomic abundance.
b. fusion temperature.
c. atomic number.
d. spin state.
A high-mass star has layers that are arranged in order of b. Temperature for fusion.
What is the temperature of fusion?The temperature at which a substance transforms from a solid to a liquid is known as its melting point. The solid and liquid phases are in equilibrium at the melting point. Pressure affects a substance's melting point, which is typically reported at a standard pressure such 1 atmosphere or 100 kPa. There are two main categories of fusion reactions: those that maintain the ratio of protons to neutrons and those that convert protons to neutrons. The solid-liquid and liquid-to-gas transitions are connected with the typical heats of fusion and vaporization, respectively, for each substance.
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If the car maintains its constant acceleration, how much additional time does it take the car to reach a velocity of 35.0 m/sm/s ? express your answer in seconds.
5 seconds is the additional time.
Describe acceleration using an example.It is possible for an object's velocity to alter by increasing, decreasing, or changing its direction of motion. A few instances of acceleration include an apple falling to the ground, the moon orbiting the earth, and a car coming to a stop at a set of traffic lights.How is acceleration measured?A metre per second (m/s2) is used to measure acceleration. The newton is the unit of force responsible for producing an acceleration of one meter per second per second when applied to a mass of one kilogram.learn more about acceleration here
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what is sound and how does it move through different mediums?
Suppose a and b are orthogonal vectors. what is projab? why? give a geometric interpretation in r2 and r3.
A and B are orthogonal vectors, so projab=0 and projab = b
If the vectors a and b are present in, then b is projected onto an as
[tex]proj_{a} b[/tex] = [tex]\frac{a.b}{a^{2} }[/tex]a.
Suppose a and b are orthogonal vectors. Then and
[tex]proj_{a} b[/tex][tex]=\frac{a.b}{a^{2} }=0[/tex]
Suppose a and b are parallel vectors. Then a scaler c exists such that b=cx and
[tex]proj_{a} b=[/tex][tex]=\frac{a.b}{a^{2} }=c\frac{a.b}{a^{2} } a=ca=b[/tex]
[tex]proj_{a} b=0\\proj_{a} b=b[/tex]
What are the orthogonal unit vectors?The term "orthogonal unit vectors" refers to a collection of vectors that are mutually perpendicular to one another, that is, they intersect at an angle of 90° with a magnitude of one unit. Since Cos90 is zero, the dot product of an orthogonal vector is always zero.
Two orthogonal vectors have a zero dot product. The zero dot product of the two column matrices that represent them. It only matters in relation to orientation. In the case of orthogonal vectors, the dot product is zero.
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An olympic swimming pool is approximately 88,263 ft3. how many cubic meters (m3) is this? assume there are 3.28 ft in 1 meter.
There are 2501.3m³ in 88,263 ft³ the Olympic swimming pool.
What is geometry?Along with arithmetic, geometry is one of the oldest subfields of mathematics. It is concerned with spatial characteristics like the separation between objects, their shape and size, and their relative positions. Geometer is the term used to describe a mathematician who specializes in geometry.
What exactly does geometry in physics mean?The area of mathematics known as geometry is concerned with the characteristics of the surrounding environment as well as the shapes of particular objects and their spatial relationships.
According to the given information:swimming pool is approximately 88,263 ft³
assume there are 3.28 ft in 1 meter.
Now ,
Given that :
3.28ft = 1m
1 ft = 1/(3.28)m
So,
1 ft = (1/3.28)³m³
88,263 ft³ = 88263/(3.28)³
= 2501.3m³
There are 2501.3m³ in the Olympic swimming pool.
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A proton is suspended in the air by an electric field at the surface of a planet whose gravitational acceleration is g = 10.2 m/s2. what is the strength of this electric field?
The strength of this electric field is 10.64×10⁸ N/C.
Electric field strength is a quantitative expression of the intensity at a particular location of a electric field.
It is a vector quantity.
Electrostatic force on the charge :
[tex]F_{e} = mg[/tex] (equation1).
m = mass
g = gravity
electrostatic force of a charge on an electric field :
[tex]F_{e} = Eq[/tex] (equation2).
E = magnitude of electric field
q = charge
using equation 1 and 2 we get
Eq = mg
m = 1.67×10⁻²⁷ kg
g = 10.2 m/s²
q = 1.6 ×10⁻¹⁹
E = mg/q
= 1.67×10⁻²⁷ kg ×10.2 m/s² / 1.6 ×10⁻¹⁹ C
E= 10.64×10⁸ N/C
The strength of this electric field is 10.64×10⁸ N/C.
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explain why ???? and ???? can have magnitudes higher than the magnitude of the input source voltage when circuit 2 is at (or close to) resonance.
The reason why voltage across the inductor and capacitor can have higher magnitudes than that of input source voltage is because of electrical energy's oscillation between magnetic and electric field.
When current passes through an inductor a magnetic field is produced and the collapsing magnetic field produced by the inductor charges the capacitor. This process repeats itself causing the electrical energy to oscillate between magnetic and electric field. Because of this oscillation, at resonance, voltage across the inductor and capacitor can be greater than the input voltage.
For a RLC circuit,
[tex]V_{s}[/tex] = [tex]\sqrt[]{V_{R}^{2} + (V_{L} - V_{C})^{2} }[/tex]
where,
[tex]V_{R}[/tex] = Voltage across the Resistor
[tex]V_{L}[/tex] = Voltage across the inductor
[tex]V_{C}[/tex] = Voltage across the capacitor
At resonance,
[tex]V_{L}[/tex] = [tex]V_{C}[/tex]
Therefore, the reason why voltage across the inductor and capacitor can have higher magnitudes than that of input source voltage is because of electrical energy's oscillation between magnetic and electric field.
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I need help with #25 PLEASEEEE!!
I DONT UNDERSTAND
what is sine wave or sinusoidal wave? write the general form of sine wave and define each term. requency and speed of this wave.
sine wave or sinusoidal wave -
sine wave can be described as a geometric waveform that oscillates periodically.
It retains its wave shape when added to the another sine wave of the same frequency.
It is a continuous wave.
the general form of sine wave is
y = asin(bx)
where
a is amplitudeamplitude is the maximum displacement from its mean position to extreme position.
b is periodicityPeriodicity is a repeating continuous pattern which determine its wavelength and frequency.
Frequency of sine wave.
1kHz that is sine wave goes through thousand complete cycle in one second.
Speed of sine wave.
Speed = frequency x wavelength
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If you use the approximate nonrelativistic equation for the magnitude of momentum of the proton, what answer do you get?
The answer is 4.96 * 10⁻¹⁹ kg m / s
Proton is an elementary particle that is identical to the nucleus of the hydrogen atom, along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and has a mass of 1.673 × 10−27 kilogram
nonrelativistic equation for the magnitude of the momentum of the proton is p = m * v
Then: p = m * v
Then Let's calculate its value
After that p = 1.67 * 10⁻²⁷ * 0.99 * 3 * 10⁸
Now, p = 4.96 * 10⁻¹⁹ kg m / s
hence the answer is 4.96 * 10⁻¹⁹ kg m / s
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An inert atmosphere was obtained by adding nitrogen in a room that measures and has a 8.00 ft ceiling. how many liters of nitrogen were used to fill the room?
An inert atmosphere was obtained by adding nitrogen in a room that measures 11.0 ft x 11.0 ft and has a 8.00 ft ceiling. The number of liters of nitrogen that were used to fill the room is : (D) 2.74 x 104 Liters.
The number of liters of nitrogen that were used to fill the room
= Volume of room in cm3 x 1 Liters / 103 cm3
Volume of room in cm3 = 11.0 ft x (30.48 cm / 1 ft) x 11.0 ft x (30.48 cm / 1 ft) x 8.00 ft x (30.48 cm / 1 ft)
= 27410707.501 cm3 or 2.741 x 107 cm3
And since 1 Litres = 103 cm3
Volume of room in cm3 = 2.74 x 107 cm3
Now putting these values in the above equation we get
So, the number of liters of nitrogen that were used to fill the room
= Volume of room in cm3 x 1 Liters / 103 cm3
= 2.74 x 107 cm3 x 1 Liters / 103 cm3
= 2.741 x 104 Liters
Thus, an inert atmosphere was obtained by adding nitrogen in a room that measures 11.0 ft x 11.0 ft and has a 8.00 ft ceiling. The number of liters of nitrogen that were used to fill the room is 2.74 x 104 Liters.
The conference room of a hotel measures 40 ft by 50 ft has a 12-foot ceiling what is the area of the wallsThe area of the walls is 2 ,160 ft ²
we know that,
The area of the walls is = perimeter of the conference room * the height of the ceiling
So,
A = 2 (40 + 50 ) (12)
A = 2 , 160ft²
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A force can give a certain mass a certain acceleration. if i double the force and double the mass, the acceleration of this object will be:________
The acceleration of this item will remain constant if I double the force and double the mass.
What does acceleration mean ?The rate at which a moving object's speed and direction change over time. When something moves faster or slower, it is considered to be accelerating. Motion on a circle accelerates even while the speed is constant because the direction is always changing.
If an object is accelerating and moving in the appropriate direction, it has positive acceleration. The speeding automobile in the first scenario showed positive acceleration. The car is moving forward and accelerating in the same direction as the acceleration.Learn more about Acceleration here:
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Find the area under the standard normal curve to the right of z=0.49. round your answer to four decimal places, if necessary.
Left of z = 0.49 and right of z = 2.05, the area underneath the standard normal curve is equal to 0.7081.
What is the standard normal curve?The horizontal axis is approached by the standard normal bend as it extends indefinitely both in directions without ever being touched by it. The center of the bell-shaped, z=0 standard normal curve. Between z=3 and z=3, almost the entire area underneath the standard normal curve is located.
Use of the standard normal curve:Use the normal distribution's standard form to calculate probability. Since the standard normal distribution is indeed a probability distribution, the probability that a variable will take on a range of values is indicated by area of the curve between two points. 100% or 1 is the total area beneath the curve.
According to the given data:the region to the left of the standard normal curve,
z=0.49
To the right of,
z = 2.05
So,
The area will be:
= P[z < 0.49] + P[ z >2.05]
= P[z < 0.49] + 1 - P[ z < 2.05]
= .6879 + 1 - .9798
= 0.7081
Left of z = 0.49 and right of z = 2.05, the area underneath the standard normal curve is equal to 0.7081.
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I understand that the question you are looking for is:
Find the area under the standard normal curve to the left of z = 0.49 and to the right of z = 2.05. Round your answer to four decimal places, if necessary.
A 300-kg bear grasping a vertical tree slides down at constant velocity. the friction force between the tree and the bear is:_________
a. 30 n.
b. 300 n.
c. 3000 n.
d. more than 3000 n.
3000 N of friction exists between the bear and the tree.
How does friction force work?
Friction is the force that prevents two solid objects from rolling or sliding over one another. Even though frictional forces, such as the traction required to walk without slipping, may be advantageous, they can also be a significant hindrance to motion.Between solid surfaces, there are three basic types of friction:
RollingSliding.Static. They are graded from strongest to weakest. Fluid friction happens when liquids or gasses are mixed together.Explanation:
The bear goes down at a constant speed, thus there is no acceleration. The forces add up to zero. As a result, upward friction and downward weight result in zero
i.e.,
F-mg=0
F = mg
F = (300 kg)/10 [tex]m/s^{2}[/tex] (gravitational acceleration)
3000 N frictional force equals F.
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The electric field at point p due to a point charge q a distance r away from p has magnitude e. in order to double the magnitude of the field at p, you could:__________
You could double the charge to 2Q in order to double the size of the field at P.
What is the definition of the electric field and its formula?Each location in space where a charge exists in any form can be considered to have an electric field attached to it. The electric force per unit charge is another name for an electric field. The electric field's equation is given as E = F / Q.The magnitude of the electric field is equivalent to the newtons per coulomb at that location in space. The electric field can be calculated as the force per charge, or, put another way, the electric force is equal to the charge multiplied by the electric field at that location in space.
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Consider the reaction, 2 d(g) 3 e(g) f(g) => 2 g(g) h(g) when d is decreasing at 0.69 mol/ls, how quickly is f decreasing? give your answer to 3 decimal places.
The compound f is increasing at the rate of 0.46 mol per second.
The number of moles of a compound is defined as the mass of the compound divided by its molecular mass. The SI unit of the number of moles is mol. The number of moles is represented by the symbol 'n'.
[tex]Number \: of \: moles = \frac{ Mass}{ Molecular \: mass}[/tex]
[tex]n = \frac{m}{M} [/tex]
The balanced equation for the reaction is,
2 d (g) + 3 e (g) + f (g) => 2 g (g) + h (g)
In the reaction, 3 moles of compound e are consumed to give 2 moles of compound g.
For 1 mole of compound e consumed to form =
[tex] \frac{2}{3} \: moles \: of \: g \: formed.[/tex]
The compound e is decreasing at the of = 0.69 mol/s
So, the rate at which g is increasing is,
[tex] = \frac{2}{3} \times 0.69[/tex]
[tex]= 0.46 \: mol/ s[/tex]
Therefore, compound f is increasing at the rate of 0.46 mol per second.
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A certain sample of the mineral galena (lead sulfide) weighs 12.4 g and has a volume of 1.64 cm3 . what is the density of galena?
The density of galena is 7.56 g/cm³.
We need to know about the density to solve this problem. Density can be described as how much the mass is in a volume unit. It can be written
ρ = m / V
where ρ is density, m is mass and V volume
From the question above, we know that
m = 12.4 g
V = 1.64 cm³
By substituting the given parameter, we can calculate the density
ρ = m / V
ρ = 12.4 / 1.64
ρ = 7.56 g/cm³
Hence, the density of galena is 7.56 g/cm³.
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The potential at points a and b are: va = -2 v and vb = 6 v. when a 5 c charge is moved from a to b, the change in potential energy of this system is:__________
This system's potential energy changed by 40 J.
Energy = charge * potential difference
=> Energy = (8v)*5
=> Energy = 40 J
Hence the answer is 40 J.
What is potential difference?Potential difference, often known as voltage, is equal to the amount of current times the resistance. One Joule, or one Volt, of energy is required for one Coulomb of charge to flow from one place in a circuit to the another.
What is the formula for the potential difference?V=U q, The change in the potential energy of a charge q transported from point A to point B, divided by the charge, is what is used to determine the electric potential difference between points A and B, or VBVA. The joules per coulomb unit of the potential difference is called the volt (V).
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20 drops of an essential oil have a mass of 407.7 mg (milligram) and a density of 0.875g/cm3. what is the volume occupied by the drops?
Volume occupied by the drops is 0.46 cm^3
Given:
no. of drops of oil = 20 drops
mass of 20 drops = 407.7 mg
Density of 20 drops = 0.875g/cm3
To Find:
Volume occupied by the drops
Solution:
Density is define as mass per unit volume
by using the formula we can find volume
Density = mass/volume
0.875 = 0.4077 gram/ volume
Volume = 0.4077 gram/0.875 = 0.46 cm^3
Hence, volume occupied by 20 oil drops is
0.46 cm^3
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A labrador retriever runs 50.0 meters in 7.20 seconds to retrieve a bird. the dog then runs half way back in 3.85 seconds. determine the average speed of the dog and the average velocity of the dog
The average speed of the dog is 6.8 m/s while the average velocity is 6.8 m/s halfway to the starting point.
Speed and velocityThe speed of a moving object is the ratio of the distance covered by the object and the time taken to cover the distance. The average speed is the ratio of the total distance traveled and the total time taken.
Velocity, on the other hand, refers to the speed in a particular direction. In other words, velocity is a vector quantity while speed is a scalar quantity.
In this case:
Total distance covered = 50 + 25
= 75 meters
Total time taken = 7.2 + 3.85
= 11.05 seconds
Average speed = 75/11.05
= 6.8 m/s
Average velocity = 6.8 m/s halfway
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In a first order decomposition, the constant is 0.00586 sec-1. what percentage of the compound is left after 3.32 minutes?
The correct answer for percentage of the compound is left after 3.32 minutes is 55 % .
We use the formula A(t) = A0e-kt for decomposition, where A0 is the initial amount of decomposed substance at t = 0, k is the decay constant, t is the time elapsed, and A(t) is the amount after time t.
The percentage of decomposed compound left after a time t is, [A(t)], divided the the initial amount, [A0], time 100, or A/A0*100:
A = A0e-kt
A/A0 = e^- 0.00586t, [k = 0.00299, divide both sides by A0]
A/Ao = e^(-0.00299*199), [t = 3.32 min*(60 sec/ 1 min) =199 sec]
A/A0 = . 0.551= 55%, (* 100, rounded)
The Arrhenius equation is k = Ae(-Ea/kT), where A is the frequency or pre-exponential factor and e(-Ea/RT) is the fraction of collisions at temperature T that have enough energy to overcome the activation barrier (i.e., have energy greater than or equal to the activation energy Ea).
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If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will:__________
The true airspeed will increase and true altitude will increase.
What is true air speed?True airspeed is the airspeed of an aircraft relative to undisturbed air.
It's the aircraft speed relative to the airmass in which it's flying.
How does outside air temperature affect air speed?If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will increase and true altitude will increase.
Thus, the true airspeed will increase and true altitude will increase.
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A runner with a mass of 75 kg accelerates from 0 to 7 m/s in 4 s. find the net force on the runner using the alternate form of newton's second law.
Using the Newton's second law the net force of the runner is 131.25 N
To solve this exercise the formula for net force and the formula for uniformly varied rectilinear motion (UVRM) to be applied are:
F = m * aa = (vf - vi) /tWhere:
F = Forcem = massa = accelerationvf = final velocityvi = initial velocityt = timeInformation about the problem:
m = 75 kgvf = 7 m/svi = 0 m/st = 4 sa = ?F = ?N = kg * m/s²Applying the formula for UVRM we can calculate the acceleration of the runner:
a = (vf - vi) /t
a = (7 m/s - 0 m/s) / 4s
a = 7 m/s / 4s
a = 1.75 m/s²
With the acceleration we can apply the net force formula and get:
F = m * a
F = 75 kg * 1.75 m/s²
F = 131.25 N
What is force?It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.
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If two insulated wires were to melt together where the copper conductors touched each other, the type of failure would be called a(n) ________.
A short to voltage failure would occur if the copper conductors of two insulated wires came into contact and melted together.
Describe voltage:The difference in electric potential between two points, also known as voltage, electric potential difference, electric pressure, or electric tension, is measured as the amount of work required to move a test charge per unit of energy between the two sites.
What is voltage formula?The formula reads voltage = current x resistance, or V = A x, or volts = amps x ohms.
What different voltages are there?Electrical services are categorized:
Low Voltage: 1000 volts or less.Medium Voltage is defined as much over 1000 volts and under 100 kV.High Voltage is defined as voltages of at least 100 kV but not more than 230 kV.Ultra-High Voltage is defined as 1000 kV or more.To know more about Voltage visit:
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What is displacement?
A an action exerted on a body in order to change the body's state of rest or motion
B the distance traveled divided by the time interval during which the motion occurred
the change in position of an object
Dan object's change in position relative to a reference point
Displacement is the change in position of an object. Displacement is a vector quantity.
As for the given options, option (a) is the definition of Force. Option (b) is the definition of velocity. Option (d) is the definition of motion. Displacement is the shortest distance between initial point and final point whereas distance is the total distance covered from initial point to final point.
Since displacement is a measure of length, its unit is usually meter. It is denoted as Δx. The formula for calculating displacement is Δx = [tex]x_{2}[/tex] - [tex]x_{1}[/tex], where [tex]x_{2}[/tex] is the final position and [tex]x_{1}[/tex] is the initial position.
Therefore, Displacement is the change in position of an object.
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If earth receives half as much light per unit area per unit time from star a compared to star b, what is the apparent visual magnitude difference between the stars?
The apparent visual magnitude difference between the Star A is higher.
What does apparent visual magnitude measure?A star's apparent magnitude, or m, indicates how brilliant the star appears when it is far away from Earth. The scale is logarithmic and "backwards." Stars with larger magnitudes are also fainter stars. Be aware that brightness is another word for the flux of light that is coming at us and is measured in Watts per square meter.
The brightness of a star or other celestial object as seen from Earth is expressed in terms of apparent magnitude. The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The brightness of a star or other celestial object perceived from Earth is measured in apparent magnitude (m). The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The apparent visual magnitude difference between the Star A is higher.
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In the photoelectric effect, a beam of light impinges on a metal, and it is observed that electrons are ejected from the metal in greater numbers as the?
In the photoelectric effect, a beam of light impinges on metal, and it is observed that electrons are ejected from the metal in greater numbers as the intensity of light increases.
In physics, the photoelectric effect refers to a phenomenon in which the emission of charged particles takes place from a material or substance after absorbing electromagnetic radiation.
When light hits the surface of the material then electrons are released known as photoelectrons.
This phenomenon better explains the quantum nature of electrons and light.
Moreover, the study of the dual nature of wave particles has further expanded the scope, investigation, and understanding of the matter.
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