Alight wave moves from a medium where particles of matter are closely packed to a medium made of very little matter. how do you expect the light wave to travel differently?
the light will change wavelength and lose energy.
the wavelength will change along with the frequency.
the wave will move faster, increasing its speed.

Most energy in an ecosystem comes originally from_

Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?