How much work is done when a hoist lifts a 290-kg rock to a height of 7 m?

Describe the differences of the four different variables Dependent: Independent: Constant: Control: I lost my paper that had the answers! I can be really messy at times ... >-

Two objects, X and Y, are held at rest on a horizontal frictionless surface and a spring is compressed between them. The mass of X is 2/5 times the mass of Y.

Lab 7B Conservation of Energy What limits how much a system may change?

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. the acceleration of gravity is 9.8 m/s 2. if her speed is 430 m/s at this time, find the radius of the loop. answer in units of km.

The slow, steady downhill flow of loose, weathered Earth materials is called

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?

A car is driving towards a brick wall at a constant velocity (don't try this at home!) and the driver honks the horn of the car. the sound of the horn reflects from the wall and the echo is heard by the driver.

Mass number of an atom with 11 protons