A 24 kg child descends a 5.0 m high slide and reaches the ground with a speed of 2.8 m/s. What is the initial position of the child?

Why is cellular respiration essential for homeostasis?

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.

A mobile phone is pulled northward by a force of 10 n and at the same time pulled southward by another force of 15 n. the resultant force on the phone is

You push your textbook 1.5 m along a horizontal tabletop with a horizontal push of 2.4 N while the opposing force of friction is 0.6 N. What is the net work done on the book?

Compressed gases aren't ideal. Let's consider a gas that's non-ideal only because the volume available to each of the N molecules is reduced because each other molecule occupies volume v. Instead of pV=NkT, we get: p (V-Nb) = NkT. Let b=1.

A protostar forms once the nebular cloud condenses and the core begins

Current is the flow of what?

Why might an electromagnet be used to pick up old cars in junk yards? a. Electromagnets are inexpensive and easily create revenue. b. Electromagnets are powerful and can be turned on and off easily. c.

The average radius of Mars is 3,397 km. If Mars completes one rotation in 24.6 hours, what is the tangential speed of objects on the planet's surface? Round your answer to the nearest whole number.

A car with a mass of 1,500 kg doubles its speed from 50 km/h to 100 km/h. by how many times does the kinetic energy of the car increase