while a block slides forward 1.35 m, a force pulls back at a 135 direction, doing - 17.8 J of work. what is the magnitude of the force? (unit=N)

An aluminum sheet is compressed to a thickness of 2.0 microns. If each cubic centimeter of aluminum has a mass of 2.70 g, what is the mass of an aluminum sheet, in grams, if its total surface area is 5 m2

a mass spring system makes 50 complete osillations in 10 seconds. what is the period and frequency of the oscillations

Why do electrons transfer charge and not protons?

Which example is NOT a part of the electromagnetic spectrum? A) microwaves B) radio waves C) electricity D) purple light

Many people choose to buy expensive low energy lamps instead of cheaper filament lamps. Give two reasons for this

Which wave A or B has a higher energy

What does the law of conservation of energy state about energy in a closed system?

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. Why did he expect a difference

To change gross income, someone would need to? save more per month. reduce deductions. earn more money. increase withholdings.

An elevator (mass 4150 kg) is to be designed so that the maximum acceleration is 0.0800g. what is the maximum force the motor should exert on the supporting cable?