A magnetic field line must

a. go on forever.

b. form a closed loop.

c. have a north and south pole.

d. be created by a permanent magnet.

The number of significant digits in the mass of a body measuring 4200.0 kg is 2.

Rooted plants are most likely found in which aquatic zone?

Tectonic plates move on which layers of the Earth? a. Crust and upper mantle b. Crust and mantle c. Upper and lower mantle d. Crust, mantle, outer core

A rock is dropped from a height of 2.5 meters. What is it's velocity when it reaches the ground? 3.5 meters/second

An 80.0 kg man sits on a scale in his car. The car is driving at a speed of 11.0 m/s right as it passes over the top of a semicircular hill of radius 17.0 m. What does the scale read right when he is at the top

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite

On october 15, 2001, a planet was discovered orbiting around the star hd 68988. its orbital distance was measured to be 10.5 million kilometers from the center of the star, and its orbital period was estimated at 6.3 days.

A container of rocks with a mass of 65.0 kilograms is brought back from the moon's surface where the acceleration due to gravity is 1.62 meters per second2. what is the weight of the container of rocks on earth's surface?

A curved, transparent object used to refract light