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liubo4ka [24]
3 years ago
12

Astronauts on the first trip to Mars take along a pendulumthat has a period on earth of 1.50 {\rm s}. The period on Mars turns o

ut to be 2.45{\rm s}.What is the free-fall acceleration onMars?gmars= m/s2
Physics
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

3.7 m/s^2

Explanation:

The period of a pendulum is given by:

T=2\pi \sqrt{\frac{L}{g}}

where L is the length of the pendulum and g is the free-fall acceleration on the planet.

In this problem, we know that the period of the pendulum on Earth is:

T_e = 1.50 s

while the period of the same pendulum on Mars is

T_m = 2.45 s

And since the length of the pendulum L does not change, we can write:

\frac{T_e}{T_m}=\frac{2\pi \sqrt{\frac{L}{g_e}}}{2\pi \sqrt{\frac{L}{g_m}}}=\sqrt{\frac{g_m}{g_e}}

where

g_e = 9.8 m/s^2 is the free-fall acceleration on Earth

g_m = ? is the free-fall acceleration on Mars

Re-arranging the equation and substituting numbers, we find:

g_m = \frac{T_e^2}{T_m^2}g_e=\frac{(1.50 s)^2}{(2.45 s)^2}(9.8 m/s^2)=3.7 m/s^2

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Answer:

Mike will receive an electric shock

Explanation:

Human body is a conductor of electricity. When lightning strikes rod and give it negative charge, the rod will dissipate its charge as soon as it comes in contact with earth via conduting material. Mike will receive a severe electric shock as negatice charge pass through his body to other rod and to the ground.His body will feel numb. He may also get unconscious.

5 0
4 years ago
Label the diagram Please
Nitella [24]

The earth tilt about 23 degrees which leads to the formation of seasons on earth.

<h3>At what degree the earth tilt?</h3>

This is tilted at 23 degrees from the vertical. The northern hemisphere is in the winter season.

This is the path as the earth revolves around the sun. It takes 1 year to complete this path.

This is the path as the earth rotates around its.

So we can conclude that the earth tilt about 23 degrees which leads to the formation of seasons on earth.

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8 0
2 years ago
A person can see clearly up close but cannot focus on objects beyond 75.0 cm. She opts for contact lenses to correct her vision.
Pavel [41]

Answer:

(a) nearsighted

(b) diverging

(c) the lens strength in diopters is 1.33 D, and considering the convention for divergent lenses normally prescribed as: -1 33 D

Explanation:

(a) The person is nearsighted because he/she cannot see objects at distances larger than 75 cm.

(b) the type of correcting lens has to be such that it counteracts the excessive converging power of the eye of the person, so the lens has to be diverging (which by the way carries by convention a negative focal length)

(c) the absolute value of the focal length (f) is given by the formula:

f=\frac{1}{d} =\frac{1}{0.75} = 1.33\,D

So it would normally be written with a negative signs in front indicating a divergent lens.

7 0
3 years ago
Which of the following is an example of potential energy?
goblinko [34]

Answer:

A

Explanation:

potential energy is energy due to position

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Answer:

10500 N

Explanation:

F = m*a=1400*7.5N=10500N

6 0
3 years ago
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