if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

If we used wave energy to produce electricity, which of the following would be a positive environmental benefit? A. We would have power to run lights on navigation buoys. B.

During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 0.147 kg baseball crashing through the pane of a second-floor window in a nearby building. The ball strikes the glass at 14.

Calculate the current in a circuit when the voltage of the circuit is 5 V and the circuit has a total resistance of 5 Ω.

Suppose a well-designed optical instrument is composed of two converging lenses separated by 14 cm. The focal lengths of the lenses are 0.60 and 4.5 cm. Is the instrument a microscope or a telescope

The speed of a boat in still water is 20 mph. it travels from one pier to another with the current in 4 hours and back against the current in 6 hours and 40 minutes. if the distance between piers is 100 miles, what is the speed of the current

An object has a mass of 8.00 kg. What is the gravitational force on the object by the earth?

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions? A. The sign of ΔG is positive B. The sign of ΔG is zero C. The sign of ΔG is negative D.

In a recent hockey game, one player (m=100kg) was moving at a velocity of 8 m/s when he ran into another player (m=300kg) who was at rest (v=0m/s). After the collision, the two players were stuck together (moving with the same velocity).

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova