I drop a penny from the top of the tower and it takes 1.85 seconds to hit the ground. What is the velocity in m/s

What is the frequency of light with a wavelength of 725 nm?

A box of books with mass 43 kgkg rests on the level floor of the campus bookstore. The floor is freshly waxed and has negligible friction. A bookstore worker applies a constant horizontal force with magnitude 25 NN to the box.

When gravity is the only force working on an object the object is in?

Humans and animals alike have critical periods of development. true false

What types of exercises for stomach

Two parallel plates are separated by 0.1 mm. A 10 V potential difference is maintained between those plates. If a proton is released from the positive plate, calculate the kinetic energy of the proton when it reaches the negative plate.

Which statements best describe the atoms of the gas neon? Check all that apply.

On September 8, 2004, the genesis spacecraft crashed in Utah desert because it's parachute did not open. The 210-kg capsule hit the ground at 311 km/h and penetrated the soil to a depth of 81.0 cm.

How would the composition of an atom change if both the atomic number and mass number each increase by one? A) The atom would have 1 more neutron. B) The atom would have one more proton and electron.

Water flows over a section of Niagara Falls at a rate of 1.2 * 106 kg/s and falls 29 m. The acceleration of gravity is 9.8 m/s 2. How many 80 W bulbs can be lit with this power?