Determine the centripetal force acting upon a 40-kg child who swings in a circle at a speed of 3 m/s. The radius of the swing is 20m.

How many basic types of electronic signals are there? two four three ten

What distinguishes active isolated stretching from other stretching exercises? a. the motion of bouncing b. the need for a partner c. the likelihood of injury d. the use of external objects

The speed limit on some interstate highways is roughly 100 km/h. (a) what is this in meters per second? (b) how many miles per hour is this? 2. a car is traveling at a speed of 33 m/s.

There are infinite black and white dots on a plane. Prove that the distance between one black dot and one white dot is one unit.

Can someone list two non-examples of volcano formations/eruptions?

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Suppose you are an observer standing on the Moon, looking back at Earth. If the moon is in the waxingquarter phase, what phase of the Earth would you see? A. waxing quarter B. full C. new D. waning quarter E. none; the Earth doesn't have phases

How many chromosomes will an elephant's sperm have?