A crane is used to lift an object. The crane applies a force of 400 to lift the object a distance of 25 meters in 20 seconds. Calculate the work in J performed by the crane to lift the object

Two observers in different inertial reference frames moving relative to each other at nearly the speed of light see the same two events but, using precise equipment, record different time intervals between the two events.

Albert skis down a hill at an angle of 19. He has a mass of 101 kg. What is the normal force of Albert? Answer: 936N

When you're driving on a level road and there's ice on the pavement, you hardly notice that ice while you're heading straight at a constant speed.

Which of the following energy sources is expected to have the least growth in the next 20 years? a. hydroelectricity b. coal c. natural gas d. nonhydro renewables

What do scientitsts do to easily share mesurment data they can understand

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?