A weightlifter does 450 J of work on a barbell in 3 s. How much power is the weightlifter generating?

How long will it take to heat 3kg of water from 28c to 88c in an electric kettle taking a current of 6 ampere from am emf source of 220 volt

What potential difference is needed to stop an electron that has an initial velocity v=6.0

Which part of the firearm loads, fires, and ejects shells or cartridges?

What is the difference between kinetic and potential energy? what is the difference between kinetic and potential energy? kinetic energy is stored energy and has the capacity to do work; potential energy is expressed through motion.

Calculate the force of gravity between two obejcts of masses 1300kg and 7800kg which are 0.23 apart

How is a star's emission spectrum used to study stars?

A 52.0 kg skateboarder does a trick on a half-pipe. During the trick, he reaches a speed of 8.90 m/s. The radius of the half-pipe ramp is 3.00 meters. What is the minimum centripetal force necessary to keep the skater on the ramp?

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?

A small car collides with a large truck. Is the magnitude of the force experienced by the car greater than, less than, or equal to the magnitude of the force experienced by the truck? a. less than b. equal to c. greater than

As an airplane is taking off at an airport its position is closely monitored by radar. The following three positions are measured with their corresponding times: x1 = 241.22 m at t1 = 3.70 s, x2 = 297.60 m at t2 = 4.20 s, x3 = 360.23 m at t3 = 4.