There are two electrons close to a proton. The proton's potential energy is
the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
9.216 x 10^-8 N
q1 = 1.6 x 10^-19 C
q2 = - 1.6 x 10^-19 C
r = 5 x 10^-11 m
A source of electrostatic force is
F = k q1 q2 / r^2
F = (5 x 10-11)2 / (9 x 109 x 1.6 x 10-19 x 1.6 x 10-19)
F = 9.216 x 10^-8 N
Due to the nature of the charges being in opposition to one another, this force is appealing.
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Is a scientific law more accurate than a theory?
Yes a scientific is more accurate because it has what is actually correct and what is it and ect than a theory
order the list to describe the balls morion as it drops into the spring
The list in order that best describes the ball's motion as it drops into the spring is e, b, d, a, f and c.
The order is as follows:
e) The ball is dropped from rest and then negatively accelerates due to gravityb) The push from the spring exceeds the force of gravity. The ball momentarily comes to rest.d) Acceleration of the ball changes from negative to positive due to an upward push from the spring.a) The acceleration of the ball decreases as the spring extendsf) The ball leaves the spring with a large positive velocity. The acceleration is negative due to gravity.c) The velocity decreases due to negative gravitational acceleration.Option (e) come first because it the starting point. (b) comes next as the ball comes to rest as the spring is fully compressed. (d) comes next as the ball started its upward movement. (a) comes next as the spring is extending. (f) comes next as the ball has completely left the spring. (c) comes next as it indicates the balls movement after leaving the spring.+
Therefore, e, b, d, a, f and c is the correct order of explanation of the ball's movement.
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How do you find the x and y components of a vector ?
Answer:
If you were given the vector in vectorial form, for example, <5,7>, then the first number (5) will always be the x component and the second number (7) is the y component.
In other cases, you are given the magnitude of the vector and the angle created by said magnitude with respect to the y or x axis. In these cases, you must use the magnitude and angle of the vector as if it was the hypotenuse of a right triangle and find the values of x and y as the legs of said triangle using the sine and cosine created by the magnitude of the vector and the value of said magnitude.
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The speed of a train increases from 100 km/hr to 250 km/hr in 5 minutes. What is its acceleration?
Answer:30 km/hr2 is the exal
Explanation:
The makers of brand A hand sanitizer want to prove that their sanitizer kills more bacteria than the other 4 leading brands of sanitizer. They organize 60 test subjects into 6 groups of 10 test subjects. The test subjects participate everyday for one week, the data for the experiment is shown below where the final average number of bacteria still remaining is given.
Table 1. Effectiveness of Hand Sanitizer on Bacteria
[See Attached]
Please develop a CONCLUSION for this experiment.
Based on the results of the experiment, it can be concluded that the claim by Brand A that their sanitizer kills more bacteria than the other 4 leading brands of sanitizer is true.
What is an experiment?An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
The experiment is the foundation of the scientific method, which is a systematic means of exploring the world around us.
Experiments takes place in laboratories, but can also be performed anywhere at any time.
There are some steps in the scientific methods which includes:
Make observations.Formulate a hypothesis.Design and conduct an experiment to test the hypothesis.Evaluate the results of the experiment.Accept or reject the hypothesis.If necessary, make and test a new hypothesis.Considering the data table from the experiment:
The results of this study concur with brand A goals as hand sanitizers producers as product effectiveness has improved over time. The performance of brands A has indicated improved effectiveness as their claims has been found true with respect to other manufacturers of the sanitizer. This study showed that brand A hand sanitizers were tested and found more effective against selected brands.
In conclusion, the results of the experiments showed that in the comparison between the brands of hand sanitizers, brand A were most effective.
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1. What is the temperature in Celsius, If the Fahrenheit was 57.98 Farenheit?
Answer:
57.98 °Fahrenheit =
14.4333 °Celsius
Explanation:
(rounded to 6 digits)
Normal temperature of human body is 98.6F while its atmosphere temperature is 84.6F what will be temperature of dead body in such atmosphere
A. 84.6F
B. 98.6F
C. 92.5F
D. 185F
Answer:
B. 98.6F is the temperature of dead body in 84.6F atmosphere.
Answer:
See below
Explanation:
After a while, the body will assume the temperature of its surroundings
and will be 84.6 degrees F
IMMEDIATLY after death the body will still be at 98.6 F ...but beginning to cool......
The kilowatt -hour (kWh) is a much larger unit of energy than the joule. There are 3.6×10^6J in a kWh. The kWh is convenient for electrical appliances. a) What is the energy used in operating a 1200W heater for 20 minutes?
The correct answer is 144 KJ .
Work power, or simply power, is referred to as a physical notion that, depending on the situation and the information at hand, may have a variety of interpretations. The rate of performing labour is referred to as power. Power is defined as the amount of energy used per unit of time. Since it lacks a direction, it is present in scalar amount. Joules/second, or Watt in the SI system, is the unit of power. A watt is the amount of energy required to perform one joule of work in a second.
P = 120 Watts of power
20 minutes plus 60 seconds equals 1200 seconds.
taken t and Energy E= Power P x Time t.
= Work W (or Energy E)/Time
since we know that Power P
Energy E= 120 W x 1200 = 144000 J or 144 KJ
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If one pound of force acts through a distance of two feet, one foot-pound of work is done.
True
False
It is false that if one pound of force acts through a distance of two feet, one foot-pound of work is done.
What is work?Work is a measure of energy expended in moving an object. It is most commonly calculated by multiplying the force by distance.
It is said that no work is done if the object does not move.
According to this question, if one pound of force acts through a distance of two feet, a work of one pound-two feet is done.
It is therefore, false that if one pound of force acts through a distance of two feet, one foot-pound of work is done.
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What does a negative acceleration indicate?
staying constant speed
moving backward
speeding up
moving forward
If you square the momentum expressed in kilogram-meters per second, in what units will the answer be expressed? (Use the following as necessary: kg, m, and S.)
When you square the unit of momentum, the new unit will be expressed as kg²m²/s².
What is linear momentum?
Linear momentum is defined as the product of the mass (m) of an object and the velocity (v) of the object.
P = mv
where;
m is mass of the objectv is velocity of the objectUnit of momentum is given as; kgm/s
When unit of momentum is squared, = (kg.m/s)² = kg²m²/s²
Thus, when you square the unit of momentum, the new unit will be expressed as kg²m²/s².
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In a biathalon race you first ride a bicycle at an average speed of 19.1 mi/h for 18.5 miles, then you must run for another 5.5 miles. With what average speed, in miles per hour, must you run if your average speed for the entire race is to be 14.5 mi/h?
The average speed you must run is 7.97 mph.
What is average speed?
The average speed of an object is the ratio of total distance traveled by the object to
Average speed = total distance / total time of motion
Total time of motion = total distance / average speed
total time = (18.5 + 5.5) / (14.5)
total time = 1.66 hours
time taken during the bicycle ridet1 = 18.5 / 19.1
t1 = 0.97 hour
time taken during the runt2 = 1.66 hr - 0.97 hr
t2 = 0.69 hr
Average speed during the runv = 5.5 miles /0.69 hr
v = 7.97 mph
Thus, the average speed you must run is 7.97 mph.
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A person travels by car from one city to an-
other. She drives for 21.1 min at 86.8 km/h
10.6 min at 106 km/h, 36.5 min at 30.9 km/h,
and spends 17.4 min along the way eating
lunch and buying gas.
Determine the distance between the cities
along this route.
Answer in units of km.
68.31 km.
Explanation:First, let's refer to the distance formula:
[tex]d=v*t[/tex], where d is distance, v is velocity or speed and t is time.
Now, let's find the distance covered by each individual speed that the car had:
1. Speed 1.In order to use the formula, we need to convert minutes into hours since the speed is given in km/h.
21.1 min/60= 0.35 h.
Now, apply the distance formula.
d=(0.35h)*(86.8km/h)= 30.38 km.
2. Speed 2.Convert minutes to hours again and do the same calculations.
10.6min/60=0.18h
d=(0.18h)*(106km/h)= 19.08 km.
3. Speed 3.36.5min/60= 0.61h
d=(0.61h)*(30.9km/h)= 18.85 km.
4. Obtain the total distance.The total distance must be given by the addition of all individual distances traveled by the car on each speed:
Total distance= 30.38 km + 19.08 km + 18.85 km= 68.31 km.
A force of 20 N gives an object an acceleration of 5 m/s^2.
A)What force would be needed to give the same object an acceleration of 1 m/s^2
B) what force would be needed to give it an acceleration of 10 m/s^2
The question can be solved using the principle of Newton's second law of Motion. Newton's second law of motion is often stated as F=ma, which means the force acting on an object is equal to the mass (m) of an object times its acceleration.
F=ma
According to the given data,
Force of 20N is applied to the object
acceleration of 5 m/s^2 is obtained on the object
From Newton's second law of motion,
F=ma
20N =m x 5
m=4kg
To obtain an acceleration of 1 m/s^2, the force required will be
F= ma
F= 4 X 1 = 4 N
To obtain an acceleration of 10 m/s^2, the force required will be
F=ma
F= 4 x 10
= 40 N
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During a cold winter night in Boston, a family uses a 1500 W electric space heater with
an applied voltage of 110 V to keep warm for 8 hours. Determine the electrical current
drawn by the heater, in Amps, and total amount of energy supplied to the heater by
electrical work, in kW·h. If electric power is valued at $0.08/ kW·h, determine the cost of
operation for the night.
The cost of operating it through the night is $0.96.
What is the current?We know that the electrical current is obtained by the use of the formula;
P = IV
P = power
V = voltage
I = current
I = P/V
I = 1500 W/110 V
I = 13.6 A
Now;
The power in kW = 1.5 kW hence the energy used in 1 hour is 1.5 kWhr
If the cost of 1 kWhr = $0.08
Then 1.5 kWhr costs = 1.5 kWhr * $0.08/1 kWhr
= $0.12
To operate it all through the night = 8 * $0.12 = $0.96
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A reconnaissance plane flies 512 km away
from its base at 742 m/s, then flies back to its
base at 1113 m/s.
What is its average speed?
Answer in units of m/s.
Answer in units of m/s
The average speed of round trip is 1192.8 m/s
Average speed of the round trip is
2*994*1491/(994+1491)
= 1192.8 m/s
The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.The mean value of a body's speed over a period of time is its average speed. Since a moving body's speed is not constant over time and fluctuates, the average speed formula is required. The numbers of total time and total distance travelled can be used even with fluctuating speed.Learn more about average speed at:
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What is the mass of a 10.4 cm³ cube of lead.
The mass of a 10.4 cm³ is, approximately, 117.42 grams.
Explanation:Volume of the cube: 10.4 cm³
Now, let's look up the density of lead:
Density of lead: 11.29 g/cm³.
This value fo density tells us that 1 cm³ of lead has a mass of 11.29g. Hence, we can stablish the following rule of 3 to find the mass of our cube.
1 cm³ ----------------> 11.29 g
10.4 cm³------------> x
x= (10.4 cm³ ⋅ 11.29 g)/1 cm³
x= 117.42 g.
Conclusion.
The mass of a 10.4 cm³ is, approximately, 117.42 g.
True or false. The planet's speed never changes. That is why we have a stable orbit.
O True
O False
2.819 to the nearest 10th's place.
Answer:
2.8 would be the correct answer as 1 rounds down
what enables cellular customers to continue making voice calls and connect to the internet when away from home
Answer:
Voice over Internet Protocol (VoIP)
Explanation:
is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.
76. Two electric charges -6μC and
+6μC are placed respectively in two
points A and B distant of 1m apart. The
electric field is null at the point C:
A.Located in the middle of the
segment AB
B.Located outside segment AB at
1m from A.
C.Located outside segment AB at
1m from B
D.Outside the line AB
E.No answer is right.
The correct answer is option (A) Located in the middle of the segment AB the electric field is null at the point C .
When a positive and negative charge interact, their forces act in the same direction, from positive to negative. As a result, opposite charges attract each other: the electric field and forces generated by two electrical charges of opposite polarity.
The two charges are to each other.The electric field will not be zero between two opposite charges. For opposite charges, the point of zero electric fields will lie outside the system along the line joining attracted the two charges.The field is strongest where the lines are closest together. The electric field lines converge toward charge one and away from charge two, indicating that charge one is negative and charge two is positive.
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Which change to an object would reduce its kinetic energy by half?
A. Reducing its mass to one-quarter of its original value
B. Reducing its mass to one-half of its original value
C. Increasing its velocity to twice its original value
D. Increasing its velocity to four times its original value
SUBMI
A. Reducing its mass to one-quarter of its original value; will reduce the kinetic energy of the object by half.
Kinetic energy is a type of power that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion. The type of motion can be vibration, rotation on an axis, translation (or travel along a path from one place to another), or any combination of these.
A body's translational kinetic energy is equal to half of the product of its mass, m, and its velocity, sq,v,
The formula of kinetic energy = 1/2 x mv^2
Since it is based on the mass of the object, the kinetic energy also gets reduced by half along with the mass.
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What is the escape speed from the Moon?
The Moon’s mass is 7.4×10^22 kg and its radius is 1700 km.
The speed of a spacecraft moving in a circular orbit just above the lunar surface: v = 1700 m/s
Express your answer using two significant figures.
v = __________ m/s
Answer:
1/2 m v^2 - G M m / R escape velocity equal to energy at surface
v^2 = 2 G M / R = 2 * 6.67E-11 * 7.4E22 / 1.7E6
v^2 = 2 * 6.67 * 7.4 / 1.7 * 105 = 5.81E6
v = 2410 m/s = 2400 m/s
1. You are part of a new team of colleagues at work and you are trying to remember everyone's
name. What part of the brain would be responsible for making sure you know who everyone is?
a. Hippocampus
b. Hypothalamus
c. Amygdala
d. Thalamus
The part of the brain that would be responsible for making sure you know who everyone is Hippocampus; option A
What is the brain?The brain is the organ in the body which controls the function of other organs in the body.
The brain is made up of cells called neurons.
The brain is divide into three main parts namely:
the cerebrum,the brainstem, andthe cerebellumThe cerebrum consists of two cerebral hemispheres the outer layer called the cortex.
The brainstem consists of the medulla, pons, and midbrain.
The cerebellum consists of three lobes the anterior lobe, the posterior lobe and the flocculonodular lobe.
The hippocampus is part of the temporal lobe which controls recognition and dentification of people.
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The outline of a partial periodic table is shown below.
You are making observations of an unknown metal. In which section of the periodic table should the unknown metal be located? a. Section 1 b. Section 2 c. Section 3 d. Section 4
Answer:
section 2
Explanation:
section 2 contains Alkali, Alkaline, Transition, and Post-transition metals
How can urban or rural infrastructure play a role in a community recreation?
Urban or rural infrastructure can play an important role in a community recreation because these infrastructure is used by people of the community for the recreational purpose.
How can urban or rural infrastructure play a role in a community recreation?Urban Community:
The density of population and networks of activities, the cities contain publics buildings as well as government buildings which have organized religion, commerce, social interactions. So these peoples and the buildings provide the focus for communities.
The Urban infrastructure consists of gas distribution, urban transport, primary health services and many other things.
Rural Community:
Agriculture is the main fundamental need for the rural areas people which forms the basis of rural economy. A farmer has to perform various agriculture activities for which he needs the cooperation of his family and usually need a very large area for the farming.
So we can conclude that Urban or rural infrastructure can play an important role in a community recreation because these infrastructure is used by people of the community for the recreational purpose.
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At the end of a race a runner decelerates from a velocity of 9.00 m/s at a rate of 0.300 m/s2.
(a) How far does she travel in the next 15.0 s?
(b) What is her final velocity?
(a)In the next 15.0s, she traveled 101.250 m.
(b) 4.50 m/s is the runner's final speed.
Given:- initial velocity = 9m/s , deacceleration = 0.3 m/s2
distana(d), she moves in time (t)=15 s,
and we must determine this using the second equation of motion.
S = ut + 1/2 at2,
where s = the distance
u = initial velocity
t = time
a=-d = 0.300m/s
t=15.0
By putting all values in the formula above,
we have
d = (9.00)x(15.0)-1/2 (0.300) (15.0)²
d= 101.250 m.
In the next 15.0s, she traveled 101.250 m.
final speed (v) =?
from 1 Equation of Motion : v = u+at.
To solve, v=?
u=9.00 m/s
a= -d= 0.300 m/s²
t=15.0
v=u+at
v= 9 - 0.300 X15.0
= 4.50 m/s
4.50 m/s is the runner's final speed.
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An 8kg bullet is shot into a 4kg block , at rest on a frictionless horizontal surface . The bullet remains lodged in the block.The block moves into an ideal massless spring and compresses it by 8, 7cm. The spring constant of the spring is 2400n/m.What is the initial speed of the bullet?
By applying the law of conservation of energy, the initial speed of this bullet is equal to 1.8456 m/s.
Given the following data:
Mass of the bullet, m₁ = 8 kgMass of the block, m₂ = 4 kg.Initial speed of block = 0 m/s (since it's at rest).Compression in the spring, x = 8.7 cm to m = 8.7 × 10 mSpring constant, k = 2400 N/m.How to calculate initial speed of the bullet?First of all, we would apply the law of conservation of momentum to derive an expression for the final velocity of both objects (bullet and block):
m₁u₁ + m₂u₂ = (m₁ + m₂)v
m₁u₁ + 0 = (m₁ + m₂)v
m₁u₁ = (m₁ + m₂)v
v = m₁u₁/(m₁ + m₂)
In order to calculate the initial speed of this bullet, we would also apply the law of conservation of energy:
K.E = U
1/2 × (m₁ + m₂)v² = 1/2kx²
Substituting the value of v, we have:
(m₁ + m₂)[m₁u₁/(m₁ + m₂)]² = kx²
m₁²u₁²/(m₁ + m₂) = kx²
m₁²u₁² = (m₁ + m₂)kx²
u₁² = [(m₁ + m₂)kx²]/m₁²
u₁ = √([(m₁ + m₂)kx²]/m₁²)
u₁ = √([(8 + 4) × 2400 × 0.087²]/8²)
u₁ = √([12 × 2400 × 0.007569]/64)
u₁ = √217.9872/64
u₁ = √3.4061
Initial speed, u₁ = 1.8456 m/s.
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You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20
min.
What is your VELOCITY in m/s?
0m/s
-9 m/s
-3 m/s
+4 m/s
Answer:
+4m/s
Explanation:
You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min, then velocity is 4 m/s.
What is velocity?When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.
Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time.
Given in the question you drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min.
The velocity in m/sec is given as 4 m/s.
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d) A Body of mass 12.0 kg is placed on an orange tree 20.0 metres above the ground.
i. Calculate its potential energy with respect to the ground.
ii. If the body is released from this height, what will be its kinetic energy just before it hits the ground.
[Take g = 10 ms2]
Answer:
here's the answer
Explanation:
given:
h= 20.0m
M= 12.0kg
g=10m/s²
solution:
potential energy = mgh = (12.0kg)(10m/s²)(20.0m)
= 2400
potential energy = 2400J
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