Which of the following best describes the jet stream? it is a current in the atmosphere. it is a current in a river. it is a current in the ocean. it is a stream of low pressure in the atmosphere.

A 0.40 ohms resistor is made from a wire of length 5m and resistivity 2*10-6 ohms m what is the cross sectional area of the wire

The device shown below contains 2 kg of water. The cylinder is allowed to fall 800 m during which the temperature of the water increases by 2.4°C. Some amount of water is added to the container and the experiment is repeated.

What does an electromagnet do?

Mike rides his motorcycle at an average speed of 20 meters/seconds for 500 seconds, how far did he ride?

A projectile is launched at an angle of 30° from the horizontal and lands 69 s later at the same height from which it was launched. (a) What is the initial speed of the projectile (in m/s) ?

What is the kinetic energy (in joules) of a. 2 kg softball thrown at a speed of 40 m/sec? (answer should be in correct units)

How is the information sent back to earth by the robots?

During which change of state do atoms lose energy? sublimation freezing boiling melting

Why does the rotation of earth require people to establish times zones?

Which of the following statements best describes the importance of investigations in science