A child sitting 1.10m from the center of a merry-go-round moves with a speed of 1.25m/s. calculate (a) the centripetal acceleration of the child, and (b) the net horizontal force exerted on the child (mass=25.0 kg)

Calculate the density of mercury if 500 cm3 has a mass of 6.60 kg. Give your answer in g/cm?.

You are exploring a distant planet. When your spaceship is in a circular orbit at a distance of 630 km above the planet's surface, the ship's orbital speed is 4900 m/s. By observing the planet, you determine its radius to be 4.48*106m.

If a person driving 130 miles per hour and hit a brick wall? Does the brick wall hit (push) the car back? Which Newton laws would explain this accident and why?

1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on c. disconnected d. off 2.

A rabbit running away from a wolf jumps into a briar patch leaving the ground at an angle of 36º to the horizontal at a velocity of 20.9 m/s. How far does the rabbit jump along the horizontal?

Acceleration is a vector quantity. O O A. True B. False

What will happen to the brightness of a string of bulbs hooked up in series when you increase the number of bulbs in the string? A. Each light in the string will get brighter. B. Each light in the string will get dimmer. C.

What are the two factors that influence the composition of beach material

Which of the following indicates that a ChemicL change has taken place? (A) a change from liquid to a gas (B) an increase in the volume of a substance (C) a change in the color of a substance (D) a change from a solid to a liquid A precipitate is a

Which of these circuit schematics has an ammeter?