If a 2-kg ball is thrown through the air at 20 m/s what is he momentum of the ball?

Which of the following statements is true about magnetic fields. The earth's magnetic field is confined within the core of the earth. Magnetic fields are unreliable for use in navigation.

What is the top of the wave called? frequency tough crest amplitude

Raising 100 grams of water from 40 to 60 °C (the specific heat capacity of water is 1 cal g ) requires the addition of

A 3.50kg box is moving to the right with speed 8.00m/s on a horizontal, frictionless surface. At t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude F (t) = (6.

Which hypothesis could be used in a scientific experiment and possibly lead to more hypotheses and experimentation?

How many types of quarks are there and what is the name of one of them

A windmill produces 1400 watts of electric power that is used to heat water. The efficiency is 100%. How long will it take to raise the temperature of 40 gallons of water by 50∘F?

What is a chemical energy

Multiple sound waves reflections in a room are called?

A shopping mall has a length of 200 m and a width of 75 m. What is the area of the mall?