The movers apply a force of 430 N to push a piano up a 2.0 m long ramp. How much work has been done when they reach the top of the ramp?

428 Watts

ОА

B

215 Joules

1. A cart weighing 420 N rests on a 23° incline. Calculate the component of its weight that presses the cart to the hill.

When a potassium ion (k+) enters a gaurd cell it creates a solution of what?

Science fiction movies depict astronauts landing on large asteroids. The gravitational force of such bodies is typically less that 0.1 N/kg. Given an astronaut with a mass of 77.3 kilograms: (a) What would his weight be on Earth (g = 9.

A cyclist turns a corner with a radius of 37 m at a speed of 22 m/s. What's the cyclist acceleration? If the cyclist and cycle have a combined mass of 90 kg, what is the force causing them to turn?

Which statements are true about ionic compounds? A. An ionic compound can be named using prefixes. B. An ionic compound is made of a positive cation and a negative anion. C. An ionic compound of two elements has three possible formulas. D.

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False