The hammer of an electric bell strikes 1440 times in a minute and does a work of 0.2 J per strike. what is the power of hammer in S. I. system?

Suppose a membrane surrounded an oil droplet, as it does in the cells of plant seeds and in some animal cells. describe and explain the form it might take.

The momentum of an object can change. True or false

Explain gravitational assist

An electric insulator is a material: A. Containing no electrons B. Through which electrons do not flow easily C. That has more electrons than protons on its surface D. Cannot be a pure chemical element

What is the relationship between sunspots and geomagnetic storms?

A car moving at a steady 10 m/s on a level highway encounters a bump that has a circular cross-section with a radius of 30 m. The car maintains its speed over the bump. What is the normal force exerted by the seat of the car on a 60.

Determine the magnitude of the force p required to hold the 180-kg crate in equilibrium.

Match the following: 12) Site where resistance to blood flow is greatest. 13) Site where blood pressure is lowest. 14) Site where exchanges of food and gases are made. 15) Site where the blood pressure is greatest.

How many trees were sold in all during 1999 and 2000?

a cannon sits on a stationary railroad flatcar with a total mass of 1000 kg. when a 10 kg cannonball is fired to the left at a speed of 50 m/s, what is the speed of the flatcar