What is the mechanical advantage of a

machine that exerts a force of 160 N on

an object when a person exerts a force of

20 N on the machine?

What do am electron and a neutron have in common

If the window is 11 m above the ground, find the time the stone is in flight.

A color television tube generates some X-rays when its electron beam strikes the screen. What is the shortest wavelength of these X-rays, in meters, if a 31 kV potential is used to accelerate the electrons?

Explain the relationship between DNA, Chromosomes and genes.

What is thE Rquation fo calculating the electrical force between two charges?

Water is poured into a container that has a leak. The mass 'm' of the water is given as a function of time 't' by, m=5t^0.8 - 3t + 20, with t>=0, mass in grams and t in seconds a. at what time is the water mass greatest, and b.

Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff. A. The ball isn't moving, so the mechanical energy is zero B. 10 J C. 98 J D.

A proton that has a mass m and is moving at + 164 m/s undergoes a head-on elastic collision with a stationary carbon nucleus of mass 12m. the velocity of the proton after the collision is answer

what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200n