Which collects light in a reflecting telescope?

a. concave lens

b. concave mirrors

c. convex lens

d. convex mirror

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

What is the energy (in joules) of an ultraviolet photon with wavelength 150 nm what is its frequency?

What color smoke coming from a coal-fired power plant would indicate wasted fuel?

Which best distinguishes between the inner and outer planets? An asteroid belt is the dividing line between the inner and outer planets. The increase in the number of moons divides the inner and outer planets.

When a star is moving away from us, the observed frequencies of light are lower than the actual frequencies. this illustration of the doppler effect is called?

Which sequence of coefficients will balance the following equation Ca (s) O2 (g) 2CaO (s)

1.) how is climate different from weather 2.) How are desert plants adapted to their climate Describe the climate and give specific example's?

A bicycle takes 8 seconds to accelerate at a constant rate from rest to a speed of 4 m/s. If the mass of the bicycle and rider together is 85 kg, what is the net force acting on the bicycle?

How is Newton's Third Law important for snowboarding

What is the weight of a 250 g bag of sweets?