John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?

Where does the energy that is used to ride a bicycle up a hill come from and how is it classified?

Which of these is an example of convection? Question 19 options: A. an egg boiling in water B. an egg frying in a pan C. an egg exposed to a flame D. an egg warming under a light

Which process causes the ground to become warm in a sunny day

Identify the six major stages of the process of scientific inquiry

A railway truck of mass 800 kg moving with a constant velocity of 5 m/s, collides and couples with another railway truck of mass 6+50 kg which is stationary.

Solve the following automotive-services problem. Remember I = E/R, where (I = amps) against resistance (R = ohms) in the electric field (E = volts.). Resistance = 0.2 ohm Current = 30 amps Voltage = 6 (T/F)

1: Explain how you can use Boyle's Law to determine the new volume of gas when its pressure is increased from 270 kPa to 540 kPa? The original volume of gas was 1 L. Assume the temperature and number of particles are constant.

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If a skater who is spinning pulls her arms in so as to reduce her rotational inertia by half, by how much will her angular momentum change? by how much will her rate of spin change?

What an object is made up of and the color of light that strikes it determine the A) apparent color of object B) transparency of the object C) opacity of the object D) translucence of the object