A star is moving toward the earth with a speed of 0.9 c (90% the speed of light). it emits light, which moves away from the star at the speed of light. relative to us on earth, the speed of the light moving towards us (emitted by the star) is

What type of structure is the cytoplasm? I Will mark as brainiest if right

Two masses, m1 = 27.0 kg and m2 = 50.0 kg, are connected by a rope that hangs over a pulley (as in fig. 10-60). the pulley is a uniform cylinder of radius 0.40 m and mass 4.8 kg. initially m1 is on the ground and m2 rests 2.5 m above the ground.

A system was prepared by placing equal volumes of pure water and a solution of starch in water in two compartments. A partition separates the two liquids. After 24 hours of incubation at 25°C, the volumes of the two liquids are no longer equal.

On a x-y graph of volume (x-axis) and mass (y-axis), the slope of the line represents

The waves that have shorter wavelengths than visible light are A. Tv B. Radio stations C. Ultraviolet rays D. Gamma rays

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron near the surface of the earth? express your answer to two significant figures and include the appropriate units.

Minerals are considered to be Answer made out of rocks the building blocks of rocks extremely rare and valuable difficult to find

the solubility product of lead fluoride is 3.6 x 10-8. what is its solubility in 0.10M NaF solution, in grams per liter

A passenger on a bus moving east sees a man standing on a curb. from the passenger's perspective, the man appears to

Which of the following is the best example of a proper hypothesis? Water will flow faster through tightly packed soil than through loosely packed soil. I think there is no effect on hearing if you listen to loud music for only three hours a day.