The source of all magnetic fields is:

- moving charges

- the earth's gravity

- the aurora borealis

- solar fields

An orange of mass 40g falls freely from a tree to the ground through a distance of 2.5m. Calculate the velocity just before it hits the ground.

Which shows the correct order of processes leading up to the formation of a main sequence star? a. Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms. b.

The force exerted on the racket by a hit tennis ball is the

Holding force constant, what will be the effect of increasing the Moment arm? (a) Depends on the direction of the force. (b) Torque will increase. (c) Torque is constant. (d) Torque will decrease. (e) The direction of rotation will change.

The proper length of the first lane of a competitive running track is 400 m (1,312.3 ft). A runner runs track from the starting line four times, stopping at the starting line.

Ursa Minor contains the pole star, Polaris, and the asterism known as the Little Dipper. From most locations in the Northern Hemisphere, all of the stars in Ursa Minor are circumpolar.

What is an organism ability to maintain a steady internal condition called

What is the fundamental frequency of a particular medium?. a. the lowest frequency at which a standing wave is possible. b. the highest frequency at which s standing wave is possible

The distance from the inner core to the surface of the earth is about 5,200 kilometers. the large amount of material surrounding the inner core places tremendous pressure on it.

What type of wave is sound? longitudinal light surface transversal