Stephen can push with 200N of force on a couch. if the couch has a mass of 20 kg, how much acceleration will the couch have? the answers: 4,000 m/s/s, 100 m/s/s, 10 m/s/s, 180 m/s/s.

In orbit, gravity: A. pulls the object toward the center. B. pushes the object outward. C. keeps the object stationary

last week, boris drove n miles. this week he drove 246 miles. using n, write an expression for the total miles he drove in 2 weeks

Use an example to explain how the available tools can affect the precision of a measurement.

Which statement about herbal health products are true? • herbal products might have negative side effects • herbal products are safe to use because they are natural • herbal products do not have any chemicals in them

Which best describes the materials that make up an electrical cord?

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques.

A hot air ballon with a mass of 500kg ascends at a constant rate of 1.5 m/s for 20s. how much work is done by the upward force?

A construction team gives an estimate of three months to repave a large stretch of a very busy road. The government responds that it's too much inconvenience to have this busy road obstructed for three months, so the job must be completed in one

Determine the time needed for the load at b to attain a speed of 10 m/s, starting from rest.

A tea kettle is warmed on an electric stove. After a while, water vapor builds inside the kettle and causes a whistle in the lid to make a sound. How does this demonstrates the first law of thermodynamics?