How are changes in matter related to changes in energy

Human power can be used to generate electricity by connecting a bicycle to a generator. The efficiency of the bicycle and generator together is 0.6. A man riding the bicycle has a power output of 220W. Calculate the power output of the generator.

The average human walks at a speed of 5km per hour if your PE teacher asks you to walk for 30 minutes in gym class how far would you walk (km) ?

How would the amount of carbon dioxide in the atmosphere change if they were no plants?

A light with a second-order bright band forms a diffraction angle of 30.0°. The diffraction grating has 250.0 lines per mm. The wavelength of the light is nm.

At what height does a 1000 kg mass have a potential energy of 1j relative to the ground

What causes the electric charges to flow from one end of the battery to the other? a balance in electric potential a balance in resistance a difference in electric potential a difference in resistance

What is one exsample of a closed economy

A transfer by work from the system, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. The specific internal energy, u, decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.7 m/s².

What is the best prediction for the weather on the day after high pressure system passes

Is it possible to have motion in the absence of a net force?