A bus is moving at 20. m/s (t=0) slows at a rate of 4.0 m/s each second.

How long does it take the bus to stop?

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite

Why is the halo of a galaxy the most important part of a galaxy?

A sphere of radius 1.59 cm and a spherical shell of radius 7.72 cm are rolling without slipping along the same floor. The two objects have the same mass.

Today, Earth's magnetic field is losing approximately 7 percent of its strength every 100 years. If the strength of Earth's magnetic field at its surface is 0.5 gauss today, what will it be 100 years from now?

Which of the following is an example of work being done on an object? A. A wagon is used to carry vegetables from a garden. OB. A pulley is used to get water from a well. C. A hammer is used to remove a nail from a wall. OD. all of these

Which of the following has the least impact on the environment? A. solar power B. nuclear power C. fossil fuels D. hydroelectric power

Why is steel better to conduct sound than air? use the words density and compression in your answer

4. How does density affect refraction of a lightwave?

Kinetic friction is affected by the weight of the object. TrueFalse

How is the temperature related to the speed of the particles