How many atoms of each element are in the reactants?

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.8 cm. its mass is 1.3 kg. calculate the density of the metal. express your answer to two significant figures and include the appropriate units.

Compare a series circuit with two bulbs to a series circuit with four bulbs. How would you expect the brightness of the two bulb circuit to compare to the brightness of the four bulb circuit? A. All of the bulbs would be equally bright. B.

When in orbit, a satellite such as the space shuttle is A. simply a projectile. B. in non-accelerated motion. C. free from Earth's gravity.

What is the formula for momentum?

f a vector has magnitude V_1 = 46 N, and direction theta_1 = 30 degree Another vector V_2 = 63 N, and direction theta_2 = 151 degree. Calculate the reference angle of the vector V_1 + V_2. Round your answer such that it has no decimal.

What is the mass in kg of a leopard in a tree if the tree branch is 36 m up and the leopard's gravitational potential energy is 29988 J?

Venus's average distance from the sun is 0.72 AU and Saturn's is 9.54 AU. Calculate the orbital velocity of Venus and Saturn around the sun. (The mass of the sun is 1.99 X 10^30 KG. an AU is 1.50 X 10^11 M.

Caleb's parent drove him to a swim meet 208 km away. It took them 2 hours, which included a 15-minute break to refuel. What was their average driving speed?

Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer? Electromagnetic waves can carry energy through matter. Electromagnetic waves can travel through empty space.

Why do different elements emit different colors of light