The power of motor is 50 w the motor drags a 2 object horizontally at a constant speed of 10m/s along a rough floor. What is the frictional force between the object and the floor

What is the number of waves per second in a radio signal? a. frequency b. interval c. recess d. velocity

Why are electrons, rather than protons, the principal charge carriers in metal wires?

A wave with a long wavelength has what kind of frequency and energy

Imagine adding electrons to the pin until the negative charge has the very large value 3.00 mc. how many electrons are added for every 109 electrons already present?

Consider a current carrying a wire coming out of your computer screen towards you. Which statement below correctly describes the magnetic field created by the current in the wire? 1.

Gerry is looking at salt under a powerful microscope and notice a crystalline structure. what can be known about the salt sample that Gerry is looking at

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive