About light and energy

This is the solid outermost layer of the Earth, including the crust and upper-mantle.

How does the force of gravity between two bodies change when the distance between them doubles? 1. unable to determine; the mass is needed. 2. doubles 3. halves 4. quadruples 5. remains the same 6. drops to one quarter of its original value?

A pump lifts water from a lake to a large tank 20 m above the lake. How much work against gravity does the pump do as it transfers 5.0 m^3 if the density is?=1000kg/m^3?

How much force must you apply to give the go cart an acceleration of 0.9m/s^2

One carpenter builds 1/5 of a house in 3/4 of a day and the other builds 2/5 of a house in the same amount of time. How many houses do the two carpenters build in total per day?

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?