What is the mass of an object traveling at 20 m/s with a kinetic energy of 4000 J?

You operate a 120 w light bulb for 5 minutes. how much energy did you use?

Problem 9) If you had light of wavelength 700nm when emitted, what would the wavelength be for an observer who is a red shift z = 0.05 from that source?

A 1 cm^3 block with a density of 0.92 g/cm^3 is floating in a container of water (d = 1g / cm^3). You may ignore any air pressure throughout this problem. What buoyant force is necessary to keep the block from sinking?

Name some types of rock that have been used to construct buildings

How to find resistance from power and Voltage?

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?

How does Newton's second law apply to an "Egg Drop" experiment?

A 4.0-n puck is traveling at 3.0 m/s. it strikes an 8.0-n puck, which is stationary. the two pucks stick together. their common final speed is:

What career has to do with one of these listed ... fossil fuels, nuclear energy, biomass, hydropower, solar energy, geothermal energy, or wind energy.

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