Answer:

Explanation:
Work is equal to the product of force and distance.

The force is 8 Newtons and the distance is 15 meters.

Substitute the values into the formula.

Multiply.

- 1 Newton meter is equal to 1 Joule
- Our answer of 120 N*m equals 120 J

The work done is <u>120 Joules</u>
Answer:
Can a room be gravitationally shielded? No, it can't.
Explanation:
the room cannot be gravitationally shielded because there is only one gravitational charge, in this case is mass. Mass can always be positive. the room can be electrically shielded because there are two type of charge, positive and negative charge than can cancel each other out.
Answer:
4.167
4.83871 cm
Explanation:
u = Object distance
v = Image distance = 25 cm
f = Focal length = 6 cm
Angular magnification is given by

The angular magnification of the lens is 4.167
Lens equation

The closest distance by which the object can be examined is 4.83871 cm
Answer:
The equilibrium temperature of the surface of the moon can be found by the formula as follows:

Where
is the solar constant and
is the Stefan's Boltzmann constant.

Thus, the equilibrium temperature of the surface of the moon is 273 K.