Any device that makes work easier s called a

A 60 kg skateboarder rider has a momentum of 580 kg-m/s in a direction 42° south of west. What is his velocity in the westward direction? A. 5.8 m/s west B. 6.5 m/s west C. 7.2 m/s west D. 9.7 m/s west

What happens to the electronegativity of elements as you move from bottom left to upper right across the periodic table?

A rock is thrown downward into a well that is 7.92 m deep. Part A If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.

Which of the following is an impact of trampling of beach grass by humans and vehicles? Decrease in air pollution Decrease in beach erosion Increase in sea water pollution Increase in marine plants and animals

A monatomic ideal gas expands slowly to twice its orig - inal volume, doing 450 J of work in the process. Find the heat added to the gas and the change in internal energy of the gas if the process is (a) isothermal; (b) adiabatic; (c) isobaric.

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.