In batting practice a batter hits a ball that is sitting at rest on top of a post. The ball leaves the post with a horizontal speed of 30.0 m/s. How much work did the force applied by the bat do on the ball

A silver bar has a mass of 260.0 g and is heated from 22.0 °C to 70.0 °C. How much heat does the silver bar absorb? Silver has a specific heat of 0.235 J / (g °C).

A car travels 1000m North and 2000m South. The total journey time is 300s. Calculate the distance traveled

For a satellite of mass mS in a circular orbit of radius rS around the Earth, determine its kinetic energy, K. Express your answer in terms of some or all of the variables mS, rS, and constants G and ME.

In order to increase the rate of acceleration of a car, you should apply more force to it. true or false

What is the smallest particle representing hydrogen peroxide? a) a hydrogen atom b) a molecule c) an oxygen atom d) diatomic oxygen

What are the arrangement of resistors in series

A pilot flies horizontally at 1300 km/h, at height h! 35 m above initially level ground. However, at time t! 0, the pilot begins to fly over ground sloping upward at angle u! 4.3° (Fig. 2-38).

A helicopter flies 30 km 30 degrees north of east, drops of the supplies to a research team; it then heads 50 degrees north of west traveling 70 km to drop the supplies to a filming crew. What is the resultant displacement of the helicopter?

Plaskett's binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below).

Is mercury (the planet) rocky or gaseous (meaning relating to or having the characteristics of a gas.)