Humans protect themselves from natural disasters by all of the following except

dams

sunscreen

building homes/shelters

levees

Describe what a person would need to do in terms of caloric input to lose weight

Briefly explain the difference between being self-centered and being self-aware. Which do you prefer and why?

What can you use to complete a circuit

Many people mistakenly believe that astronauts who orbit Earth are "above gravity." Calculate g for space shuttle territory, 200 km above Earth's surface. Earth's mass is 6.0 * 10 24 kg, and its radius is 6.38 * 10 6 m (6380 km).

If an electromagnetic wave has a frequency of 8 ⋅ 10^14 H z, what is its wavelength? Use λ=V/F. The speed of light is 3 ⋅ 10^8 m/s.

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

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?