What is the definition of light

Daca stam intr-o barca usoara si tragem de o sfoara legata de un vapor, ne vom apropia de un vapor. De ce nu se apropie vaporul de banca?

What is the electrical charge of a cation? a. positive b. negative c. no charge d. none of the above

Consider a ball (with moment of inertia I=2/5MR^2) which bounces elastically off a surface. Assume that the ball's speed in the direction perpendicular to the surface is the same before and after a bounce.

What is law of conservation of mass

Parallel light waves hit the surface of a still lake and reflect in the same direction. Which interaction of light and matter does this illustrate? scattering diffuse reflection refraction regular reflection

You push a friend sitting on a swing she has a mass of 50 kg and accelerates a rate of 4 m/s2 find the force you exerted

What must be true about tow objects if heat is flowing between them?

Will a 2 liter bottle of coke have a different density than a one liter bottle of coke?

A positive rod is placed to the left of sphere A, and the spheres are separated

Why do clothes often cling together after tumbling in a clothes dryer?