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?

Fossils reveal which of the following about a species or organism a. how the organism interacted with other organism b. the miccroscopic feature of the organism c. the growth stages of the organisms species d.

Why is the scientific method described as cyclic?

3. If the tyre of a car has a diameter of 0.7 m and if the wheel has an angular velocity of 10 radians per second, what is the speed of the car in m/s

All description of the body start with the assumption that the body is in the?

The three-toed sloth is the slowest moving land mammal. On the ground, the sloth moves at an average speed of 0.037 m/s, considerably slower m/s? than the giant tortoise, which walks at 0.076 m/s.

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard average acceleration

Explain the difference between balanced forces and action and reaction forces.

Describe and apply Newton's Three Laws

If you do 1000j of work on a system and remove 500j of heat from it, what is the change in its internal energy

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.