A flagpole is a simple device on which a flag can be raised or lowered. Which simple machine is usually part of a flag pole?
A) lever
B) wedge
C) pulley
D) inclined plane

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light