The energy required to warm one gram of water by one celsius degree is called a specific heat
The specific heat also known as specific heat capacity, is an intensive property specific, and representative of each substance. It is defined as the energy or amount of heat required to raise the temperature of 1 kilogram (kg) of mass by one degree Celsius (°C).
In the International units system of measurement the specific heat is expressed in Joules per kilogram per degree Kelvin.
What is temperature?It is the physical magnitude that allows us to know the degree of heat that a body or an environment has. The higher the temperature, the greater the degree of heat.
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The amount of voltage induced into a conductor moving in a magnetic field depends on the ______.
A measure of how quickly a conductor moves across a field. The voltage induced increased as the conductor moved through the field more quickly. The induced voltage and speed are directly inversely proportional.
When a conductor is moved in a magnetic field, a voltage will be induced on the conductor.?Current can only flow when a circuit is closed or complete, hence, unless the circuit is completed current will not flow
What is Electro-Magnetic Induction?
This a phenomenon whereby a wound wire or a soft core of conductor made to cut across magnetic line of force and an E.M.F is generated, this E.M.F forces current to flow if the circuit is completed.
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2. Which type of tire do you think would have the least amount of friction on a road?
A. a bicycle tire
B. a motorcycle tire
C. a car tire
D. a truck tire
The type of tire which would have the least amount of friction on a road is a bicycle tire and is denoted as option A.
What is Friction?This is referred to as the force which resists the relative motion of a solid surface against each other and is directly proportional to the area of contact.
This therefore means that the largest types of tires will have the most type of friction and in this scenario, it is the truck tire. However, the bicycle tire which is the smallest will have the least amount of friction on the road and is therefore the reason why option A was chosen as the most appropriate choice.
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If the releases 39.4 kj of energy, how many kilocalories does it release? (1 cal = 4.184 j) (round off answer to 2 decimal place
By using unit conversion, the energy released in kilocalories is 9.42 kcal.
We need to know about unit conversion to solve this problem. There are several energy units which able to explain how much the energy is such as calories and joule. The energy unit can be converted to another unit by unit conversion. The unit conversion of calorie to joule is
1 cal = 4.184 joule
From the question above, we know that
E = 39.4 kJ
By using the unit conversion, we can convert the energy into calorie
E = 39.4 kJ
E = 39.4 x 10³ J
E = 39.4 x 10³ / 4.184 cal
E = 9.42 x 10³ cal
E = 9.42 x 10³ /10³ kcal
E = 9.42 kcal
Hence, the energy released in kilocalories is 9.42 kcal.
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Which scientist developed the theory of gravitation and used it to explain the orbits of celestial bodies?
Isaac Newton developed gravitational theory and used the theory to describe the orbits of celestial bodies
Newton's law describes the "strength of the force of gravity between two objects," which decreases as one moves away from light. It is mathematically recognized as an "inverse square law."
The following process for picturing the field drop-off is to envision the field of gravity around an object as a set of concentric spheres. Each sphere represents the same volume of the gravitational field, but the spheres furthest from the object are larger, resulting in the same volume of field is distributed thinly over a larger area.
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A basketball weighs 20. ounces and has a volume of 456 in3. what is the average density of the basketball in g/cm3?
The basketball that 20 ounces and has a volume of 456 in3 has a density of 0.076 g/cm3
The density formula and the procedure we will use is:
ρ = m/v
Where:
v= volumeρ= densitym= massInformation about the problem:
m = 20 oz
v = 456 in3
ρ= ?
By converting the mass from ounces to grams, we get:
20 oz * (28.3495 g / 1 oz) = 566.99 g
By converting the volume from in3 to cm3, we get:
456 in3 * (16.3871 cm3 / 1 in3) = 7472.52 cm3
Applying the density formula, we get:
ρ = m/v
ρ = 566.99 g/ 7472.52 cm3
ρ = 0.076 g/cm3
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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1. If John can walk with a speed of 4 meters per second. How far will John walk if he walks for 1 hour and 30 minutes.
Answer:
21 600 m
Explanation:
4 m/s * 3600 s / hr * 1.5 hr = 21 600 m
Hypothermia is an excessive decline in a body temperature.
true/ false
It's True that Hypothermia is an excessive decline in a body temperature.
What is Hypothermia?Hypothermia is condition that occurs when the body’s temperature drops below 95° F (35° C).The normal body temperature is 98.6° F (37° C). Hypothermia is medical emergency.
When a person’s body temperature is dangerously low, the brain and the body cannot function properly. Left untreated, hypothermia can lead to the cardiac arrest (heart stops beating) and death.
What are the treatments of Hypothermia?The first steps when treating hypothermia are:
Move to warm, dry location. Remove the wet clothing and replace with the dry clothing. Cover up with the jacket, hat, and blanket
When hypothermia is the more severe, doctors may also need to:
Insert IV into your vein and pump warm fluids into your body. Give you warm oxygen through a mask or a breathing tube. Use machine that warms your blood and pumps it back into your body
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The motion of the rocket labeled a is an example of motion with uniform (i.e., constant) __________. and nonzero
a. acceleration
b. velocity
c. position
d. time
The motion of the rocket labeled a is an example of motion with uniform (i.e., constant) velocity and non- zero acceleration.
A body when covers an equal distance with an equal interval of time, this condition of the velocity is known as uniform velocity. Or, we can say that when the direction and magnitude of speed of a body do not change with time, then the body is said to be at uniform velocity.
Having a non-zero acceleration means having any amount of acceleration whatsoever. This could be either positive acceleration or negative acceleration (a.k.a. deceleration).
An object experiences a non-zero acceleration when it is speeding up, slowing down, or remaining at the same speed while changing direction. Any of these three scenarios would result in an object's velocity changing since velocity is the change in an object's position over time, and a change in velocity means the object is experiencing acceleration.
Conversely, an object has zero acceleration when it either remains stationary or moving at a constant speed in a straight line. In both of these scenarios, the velocity of the object is constant, so there is no acceleration.
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How much compression would happen if you started with 200cm of air inside a syringe
Air starts exerting more and more pressure on the walls of the syringe
What will happen to air particles when the are being compressed in a syringe?
Although the space has grown, the individual atoms and molecules can now go farther before running into a nearby atom or molecule because they can now bounce off the walls of the syringe instead of directly bouncing into one other.
Additionally, as the syringe is compressed, you are essentially cramming the same molecules into less space, which causes them to traverse shorter distances and collide more frequently.
This has to do with pressure because when molecules strike the syringe's walls, they bounce off, creating a force and response force that keeps the syringe's walls stiff against the environment it's in or the outside atmosphere. Atoms and molecules essentially bounce off the walls inside the syringe just as much as molecules outside the syringe do when the pressure inside and outside is equal. When the volume of the syringe is increased, the air molecules fill it up, which results in fewer impacts with the inner wall and less force holding the interior rigid to the exterior. Conversely, when the volume is decreased, the impacts happen more frequently because the molecules have nowhere else to go and no more space to travel before encountering another molecule or a wall, so the increase in the frequency of the impacts leads to an increase in the force holding the interior rigid to the exterior.
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The ___________ is the stationary part of an ac motor; it consists of a laminated iron core and windings (or coils) that convert electrical energy to the energy of a magnetic field.
A laminated iron heart and windings (or coils) that transform electrical energy into the energy of a magnetic field make up the stator, the stationary component of an ac motor.
Stator definition:The stator, which can be found inside electric generators, electric motors, sirens, mud motors, or biological rotors, is the stationary component of a rotating system. A stator serves as a conduit for energy going to or coming from the system's rotating part.
What purpose does a stator serve?The stator creates a magnetic field that powers the revolving armature in an electric motor; in a generator, the stator transforms this rotating magnetic field into an electric current. The stator controls the fluid flow from or to the rotating component of a fluid-powered device.
What materials make up a magnetic field?Electric charges in motion create magnetic fields. Everything is constructed of atoms, so each atom contains a nucleus that is composed of protons and neutrons, with orbiting electrons. The small moving charges known as the circling electrons lead each atom to produce a very weak magnetic field.
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Flag what horizontally applied force will accelerate a 400 kg crate at 1m/s2 across a factory floor against a friction force half its weight?
A horizontally applied force of 2400 N will accelerate a 400 kg crate at 1 m/s^2.
In the given diagram, the free body diagram (FBD) of a block is shown.
Here the two vertical forces, normal reaction(N) and weight(W) cancel each other while the horizontal forces do not cancel each other and provide acceleration to the block.
According to the given situation,
Applied Force - Frictional Force = ma
Here the frictional force is half the weight of the body 2000 N.
Putting the given values in the above equation,
F - F1 = 400 x 1
F - 2000 = 400
F = 2400 N
Hence, a horizontally applied force of 2400 N will accelerate a 400 kg crate at 1 m/s^2.
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The slowly fluctuating harmonic patterns by composer philip glass, used in his quatsi trilogy, represent what musical style?
The slowly fluctuating harmonic patterns by composer philip glass, used in his quatsi trilogy, represent minimalism musical style.
A minimalist, Philip Glass is, was, or never was. He does not appreciate being categorized, like most artists and most individuals. He has long denied being a minimalist, particularly with regard to his work produced after the mid-1970s. The Qatsi Trilogy, directed by Godfrey Reggio, begins with the 1983 release of Koyaanisqatsi. Over the two decades it took to get the movies made, the Qatsi music changed, reflecting the evolution of both Glass's overall style and the films' own, as well as of what quickly developed into a particularly symbiotic collaboration between Glass and Reggio, a composer and a director who seemed destined to work together.Learn more about the music composition with the help of the given link:
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at a time t after being projected from the ground, a projectile is displaced x units horizontally and y units vertically above its point of projection. (use any variable or symbol stated above along with the following as necessary: g for the acceleration due to gravity.)
The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]
The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t
We know that,
x = [tex]v_{0x}[/tex] t
y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]
where,
x = Horizontal displacement of the object
y = Vertical displacement of the object
g = Acceleration due to gravity
t = Time of motion
For horizontal motion there is constant velocity and for vertical motion there is uniform acceleration.
The vertical component of the initial velocity is given as
y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]
[tex]v_{0y}[/tex] t = y + ( 1/2) g[tex]t^{2}[/tex]
[tex]v_{0y}[/tex] = ( y/t ) + ( 1/2 ) gt
The horizontal component of the initial velocity is given as
x = [tex]v_{0x}[/tex] t
[tex]v_{0x}[/tex] = x / t
A projectile motion is the motion of an object thrown in air at some angle with the horizontal.
Therefore,
The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]
The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t
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John needs to measure the brightness of a light bulb using the metric system. in which unit does he express his measurement?
A. liter
B. meter
C. kilogram
D. candela
Option D: John will express his brightness unit in candela.
HOW IS THE BRIGHTNESS OF A LIGHT MEASURED?Power, or the rate at which energy is utilized or produced over time, is measured in watts. Energy providers utilize watts to calculate the amount of electricity we use in Kilowatts per Hour (kWh), which is equivalent to 1,000 watts used for one hour.
A fundamental unit of measurement for the amount of visible light that a light source emits is called a lumen (lm), also known as luminous flux.
Simply put, to assess the power of a lamp inside a lighting fixture, look for the total number of Lumens.
SUCCESS FOR LUMINAIREIn addition to the light itself, a number of other elements must be considered when estimating the amount of light that is emitted. Most lamps are housed in a light fixture that is composed of diffusers and reflectors, among other parts.
These variables, along with others like the shape and number of lights, will affect the luminaire’s brightness and light dispersion.
Luminaire efficacy considers these factors to give a more accurate estimation of the lumens generated by the entire luminaire once it is fully constructed.
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A worker at the top of a 459-m-tall television transmitting tower accidentally drops a heavy tool. if air resistance is negligible, how fast (in m/s) is the tool going just before it hits the ground?
A worker at the top of a 459-m-tall television transmitting tower accidentally drops a heavy tool. If air resistance is negligible, how fast (in m/s) is the tool going just before it hits the ground?
The rule of conservation of energy (the heavy tool’s potential energy at a height of 551 meters above the ground becomes its kinetic energy at ground level) allows us to determine the speed of the object when it hits the ground:
Kinetic Energy Equals Potential EnergyPE=KE
Since mgh=1/2mv2, the mass can cancel out.
In the case where g=9.81m/s2, gh=1/2v2
V=√2gh
=√2*9.81m/s2*459
=3 m/s
It’s possible for an object to have both kinetic and potential energy at once. For instance, a falling object that has not yet hit the ground has both kinetic and potential energy because it is traveling downward and has the capacity to go still further.
The mechanical energy of an object is the total of its potential and kinetic energies.
A falling object loses potential energy while gaining kinetic energy. The difference between the increase in kinetic energy and the decrease in potential energy is exact.
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Select the correct answer. Peter throws a snowball at his car parked in the driveway. The snowball disintegrates as it hits the car. By Newton's third law, you know that both the car and the snowball exert a force on each other. What can you say about the magnitude of the forces exerted by the snowball and the car? OA The force exerted by the car is more than the force exerted by the snowbalL OB. The force exerted by the car is less than the force exerted by the snowball. OC The force exerted by the car is equal to the force exerted by the snowball. OD. The force exerted by the car is zero.
Answer:
OA The force exerted by the car is more than the force exerted by the snowbalL
Explanation:
If the ball's force is more than the force exerted by the car then car will be moved
A decrease in one's ability to hear high-pitched, high frequency sounds is known as:_________
A decrease in one's ability to hear high-pitched, high frequency sounds is known as high-frequency hearing loss.
What is hearing?The term hearing has to do with the ability to pick out sounds. It is the ability to comprehend the meaning of sounds which may be disconnected or coherent.
Hearing occurs both at low and high frequency. The loss of hearing depends on what area of the ear that has been affected. Thus, if the inner ear of a person has been affected, there is a decrease in one's ability to hear high-pitched, high frequency sounds which is known as high-frequency hearing loss.
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How far does an object go after the pushing force is removed till it stops. the object's speed is 1.70 m/s when the pushing force is removed. friction is 52.0 n and mass of object is 80.0kg
By using uniform motion, the object will travel 2.22 meters until it stops.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
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 and s is displacement.
From the question above, we know that
vo = 1.70 m/s
F = -52 N
m = 80 kg
vt = 0 m/s
Find the deceleration
F = m . a
-52 = 80 . a
a = -0.65 m/s²
Find the distance using the second equation
vt² = vo² + 2a . s
0² = 1.7² + 2(-0.65) . s
1.3s = 2.89
s = 2.22 meters
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In heat conduction analysis, the conversion of ____ energy into ____ energy in solids is called heat generation. check all that apply
Heat conduction, also named as thermal conduction, is the heat flux in a body due to temperature difference and occurs by the movement of electrons within a body.
When all the available energies such as electrical energies, chemical energies or the nuclear energies are converted to the thermal energy, the the conversion process is called heat generation.
Thermal conduction is the process when the heat transfers from hotter region to the colder region.
In heat conduction analysis, the conversion of electrical, chemical or nuclear energy into thermal energy in solids is called as heat generation.
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What two principal factors affect the force of air resistance on a falling object?.
The two principal factors that affect the force of air resistance on a falling object are frontal area and speed, because the force mostly depends on these two factors.
What is air resistance?When an object falls through the air, it mostly encounters some sort of resistance to its speed and this resistance is named air resistance.
This resistance is present because of the collisions of the air molecules with the frontal surface molecules of the object.
Simply state, the two most common factors that have an impact on the degree of air resistance can be said out as the speed of the object and then the cross-sectional are of the object.
Because the more the speed, the more the air resistance and so is the case with the cross-sectional area.
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Action and reaction forces comprise the parts of select one:
a. a single interaction.
b. two interactions.
Action and reaction forces comprise the parts of a. a single interaction.
For every action, there is an equal and opposite reaction. According to Newton's third law there is an equal (in size) and opposite (in direction) reaction force for every action force. That means that forces result from interactions.
The force exerted on an object is the action, and the force experienced by the object is the reaction.
Some forces result from contact interactions like frictional, tensional and other forces are results of actions at a distance interaction like gravitational, electrical, magnetic.
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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What is the volume of a gold nugget that weighs 2.20 kg? the density of gold is 19 g/cm3.
According to the calculation the volume of gold = 115.79ml
What is a density unit?density is the mass of the material substance per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density.
The formula for calculating density is the weight of such an object multiplied by its volume. The mathematical formula for this is d = m/v, where s t stands for density, m for mass, and v for the volume of the item.
According to the given Data:Mass of gold nugget = 2.20 kg
= 2.20 x 1000
= 2200g
Density of a gold = 19 g/cm^3
= 19 g /mL
Substituting the value in the formula:
Density = Mass / Volume.
volume = mass / density
volume = 2200 g / 19 g/mL
= 115.79ml
According to the calculation the volume of gold = 115.79ml
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What is the value of gravitational constant G
What role is played by physics in communication
Explanation:
physics allow us to understand the electromagnetic radiation we used to transmit data with fibre optics and satellites and to build computers that interpret those signals and transmit data on the internet
Find the work done when a constant force f = 19 lbs moves a chair from x = 1.9 to x = 4.6 ft. along the x -axis.
The work done is 51.3 lb ft.
Stepsf = 19 lbs
moves a chair from x = 1.9 to x = 4.6 ft
W = [tex]\int\limits^b_aF {x} \, dx[/tex]
W = 51.3 lb ft
The work done is 51.3 lb ft.
Every time a force pushes something over a distance, work is done.
By multiplying the force by the distance moved in the force's direction, you may determine the energy transferred, or work done.
Energy transmitted equals work done, which is force times the distance travelled in the force's direction.
What is the method of work?The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea. The work is W = fd cos if the force is applied at an angle of to the displacement.learn more about work done here
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An athlete preparing for a marathon runs 21.3 miles. how many kilometers did they run?
An athlete runs 34.271 kilometer.
solution,
Here , 1 miles is equal to 1.6093 km
therefore, an athlete runs 21.3 miles
The distance measured in kilometer of athlete preparing for a marathon is given as ,
1 mile = 1.6093 km
21.3 miles = 21.3 × 1.6093 km
21.3 miles =34.271 km
Therefore an athlete preparing for a marathon runs 34.271 km.
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Changing the wavelength of a light wave also changes its:_____.
a. direction
b. frequency
c. brightness
d. speed
Answer:
frequency
Explanation:
speed of light = constant = wavelength * frequency
changing WL or F will change the other
Match the math problem to the correct equation you would use to solve it
The equation can be used to obtain the weight as 40N.
What is the weight?In this problem, we are asked to obtain the equations and thus the problems as shown. We shall now proceed to use the equations are required.
1) W = mg
W = weight
m = mass
g = acceleration due to gravity
W = 4 Kg * 10 m/s^2 = 40 N
2) v = u + at
v = final speed
u = initial speed
a = acceleration
t = time
3 = 0 + 2a
3 == 2a
a = 1.5 m/s^2
3) v = d/t
v = speed
d = distance
t = time
v = 15 m/30 s = 0.5 m/s
4) W = fd
W = work
f = force
d = distance
W = 25 N * 8 m = 200 J
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Find the matrix a of the linear transformation from r2 to r2 that rotates any vector through any angle of 120
The matrix of the linear transformation from ℝ2 to ℝ2 that rotates any vector through an angle of 120° in the anticlockwise direction is[tex]\left[\begin{array}{ccc}-1/2&\sqrt{3}/2 \\ \sqrt{3}/2 &-1/2\\\end{array}\right][/tex]
What is a matrix that can be taken for counterclockwise for an angle [tex]\alpha[/tex]
The matrix can be written as [tex]\left[\begin{array}{ccc} cos\alpha &sin\alpha \\ sin\alpha & cos\alpha \\\end{array}\right][/tex]
While putting the value of angle in the matrix, we have
[tex]\left[\begin{array}{ccc} cos120 &sin120 \\ sin120& cos120 \\\end{array}\right][/tex]
for [tex]\alpha[/tex] = 120
and thus, we have the answer as:
[tex]\left[\begin{array}{ccc}-1/2&\sqrt{3}/2 \\ \sqrt{3}/2 &-1/2\\\end{array}\right][/tex]
Therefore, the matrix can be stated as a matrix A of the linear transformation from r2 to r2 that rotates any vector through any angle of 120 in the anticlockwise direction.
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What is the x-component of the total electric field due to these two charges at a point on the x-axis?
Find the total x - component of the electric field at that point and get the resultant or the algebraic sum.
The electric field is a vector as it gives the force on a unit positive test charge placed at some distance from a charge.The electric field due to each charge at that point on the x-axis can be found using the Coulombs formula: [tex]\vec{E} = \frac{1}{4\pi\epsilon}\frac{Q}{r^2}[/tex].Then one needs to get the x-component of the electric field at the point due to each charge using the concept of the resolution of forces. Once the x-components are found, one needs to get the resultant or the algebraic sum of them to calculate the x-component of the total electric field.For extra knowledge, how to find the components of a given vector can be found here: https://brainly.com/question/28524840#SPJ4
