1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
weqwewe [10]
2 years ago
9

A 2.74 g coin, which has zero potential energy at the surface, is dropped into a 12.2 m well. After the coin comes to a stop in

the mud, what is its potential energy with respect to the surface?
A. 0.544 J
B. -0.328 J
C. 0.356 J
D. -0.165 J
Physics
1 answer:
VikaD [51]2 years ago
7 0

Answer:

B. - 0.328

Explanation

Potential Energy:<em> This is the energy of a body due to position.</em>

<em>The S.I unit of potential energy is Joules (J).</em>

<em>It can be expressed mathematically as</em>

<em>Ep = mgh........................... Equation 1</em>

<em>Where Ep = potential energy, m = mass of the coin, h = height, g = acceleration due to gravity,</em>

<em>Given: m = 2.74 g = 0.00274 kg, h = 12.2 m, g = 9.8 m/s²</em>

Substituting these values into equation 1

Ep = 0.00274×12.2×9.8

Ep = 0.328 J.

Note: Since the potential energy at the surface is zero, the potential Energy with respect to the surface = -0.328 J

The right option is B. - 0.328

<em />

You might be interested in
What is the speed of sound for a noise that travels 2km in 5.8s?​
Gnesinka [82]

Answer:

Explanation:

Speed is defined as the rate at which an object covers a particular distance. So the formula for determining speed is given as the ratio of distance to time taken for covering that distance.

Speed = Distance/Time

As here the distance is given in km units and time in s units, so the units of any one parameter should be changed. Since we know that speed of sound is always about 300 m/s. So it is better to convert the unit of distance from km to m.

Hence, now the distance traveled by the noise is 2000 m and time taken is 5.8 s.

So the speed of noise = Distance/Time = 2000/5.8=345 m/s.

Thus, the speed of noise is slightly greater than the speed of sound and it is found to be 345 m/s.

5 0
3 years ago
A coil of area 0.320 m2 is rotating at 100 rev/s with the axis of rotation perpendicular to a 0.430 T magnetic field. If the coi
weqwewe [10]

Answer:

The maximum  emf generated in the coil is 60527.49 V

Explanation:

Given;

area of coil, A = 0.320 m²

angular frequency, f = 100 rev/s

magnetic field, B = 0.43 T

number of turns, N = 700 turns

The maximum emf generated in the coil is calculated as,

E = NBAω

where;

ω is the angular speed = 2πf

E = NBA(2πf)

Substitute in the given values and solve for E

E = 700 x 0.43 x 0.32 x 2π x 100

E = 60527.49 V

Therefore, the maximum  emf generated in the coil is 60527.49 V

8 0
3 years ago
A car travelling at 55 mph for three and half hours would have travelled<br> how many miles
Mars2501 [29]

Answer:

192.5 miles

Explanation:

55mph = 55 miles in 1 hour

55 X 3.5 = 192.5

4 0
2 years ago
What does Newton's third law describe?<br> What does Newton's third law describe?
defon

Explanation:

<em>Sir Isaac Newton's third law of motion</em> says that every action has an equal and opposite reaction.

For example, when you fire a gun, the gun exerts a force on bullet. Even the bullet exerts an equal force on the gun, causing it to recoil.

The Earth revolves around the Sun as the Sun attracts it. The reason why Earth doesn't fall into it is because the Earth also attracts the Sun with an equal gravitational force.

4 0
3 years ago
TP-4 When are lights required to be installed on a trailer?
kari74 [83]

Answer:

Light are required on every trailer

Explanation:

6 0
3 years ago
Other questions:
  • A rectangular coil of dimensions 5.40cm x 8.50cm consists of25 turns of wire. The coil carries a current of 15.0 mA.
    5·1 answer
  • True or False?
    9·1 answer
  • Let at time t1 means?
    6·1 answer
  • If you were looking for a metalloid on the periodic table,the best place to look would be?
    6·1 answer
  • sound waves generated in a classroom must _______ through an open doorway in order to propagate into the hallway. reflect refrac
    14·2 answers
  • Explain why a basketball doesn’t bounce the same height each time you drop it.
    7·2 answers
  • What is WgWgW_g, the work done on the block by the force of gravity as the block moves a distance LLL up the incline? Express th
    9·1 answer
  • HELP ASAP physics projectile motion, look at the picture
    12·1 answer
  • Which has is a product of photosynthesis? A. Carbon Dioxide B. Oxygen C. Hydrogen.
    10·2 answers
  • An object is located 70 cm from a concave mirror with a focal length of 15 cm. What is the image
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!