The Sojourner Mars rover has a weight of 42.7 N on Mars where the acceleration due to gravity is 3.72 m/s2. What is Sojourner's mass on mars? What is Sojourner's mass on Earth? What is Sojourner's weight on Earth?

1) 11.5 kg

2) 11.5 kg

3) 112.7 N

Explanation:

1)

The relationship between the mass of an object and its weight is given by the relationship:

where:

W is the weight

m is the mass of the object

g is the acceleration due to gravity (the strength of the gravitational field at the location of the object)

In this problem, the object is on Mars.

Its weight is:

W = 42.7 N

While the acceleration due to gravity is:

Therefore, we can re-arrange the equation to find the mass of the rover:

2)

Here we want to find the mass of the rover on Earth.

We have to identify the main difference between mass and weight:

- The mass of an object is an intrinsec property of the object, and it describes the "amount of matter" contained in the object

- The weight of an object is the force of gravity acting on the object itself

From the definitions above, it is clear that:

- The mass of an object is independent from its location, therefore it does not change if the object moves to another planet

- The weight of an object depends on its location, as it depends on the value of , the acceleration due to gravity

Therefore, the mass of the rover on the Earth is the same as the mass of the rover on Mars:

m = 11.5 kg

3)

The weight of an object, as stated before, is the force of gravity acting on the object, and it is given by

where

m is the mass of the object

g is the acceleration  due to gravity

On the surface of the Earth, the value of the acceleration due to gravity is

While the mass of the rover is

m = 11.5 kg

Therefore, the weight of the rover on Earth is

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.