A lever is used to lift a heavy rock. The mechanical advantage of the lever is 4 and the lever applies a force of 800 N to the rock. What is the force applied to the lever?

Felicia left home at 8 a. m. driving her Ferrari at 80 mph from Rome to Sorrento. After spending 5 hrs in town, she drove back at 60mph, arriving in Rome at 8 p. m. How far is it from Rome to Sorrento

What happens to the current in a circuit if the resistance triples? If the voltage triples?

An object is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150 N. What is the tension in each wire? 41.6 newtons 82.3 newtons 150 newtons 117 newtons

This design enabled them to control for several factors. The total area of the patch plus the corridor, or the patch plus the wings was the same. The total amount of edge (perimeter of each patch) was similar between the two treatments.

A football is kicked with a velocity of 31 meters per second at an angle of 41 degrees what is the balls acceleration in the vertical direction as it flies through the air

Two stars, x and y, have the same temperature. star x is ten times more luminous than star y. which star has the larger radius

If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is A. mg/2 B. mg C. 2mg D. 4mg

In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.830). It has a temperature of 64.1 oC.

Air is compressed adiabatically in a piston-cylinder assembly from 1 bar, 300 K to 10 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible.

Three rocks, each of varying mass and volume, are released from a window at the same time. The window is at height h above the ground.