You performed an experiment to find out how strong the net below a trapeze should be to safely catch a performer of mass 80 kg. which of the following is a new scientific question that can be investigated in the laboratory?

a. it is more exciting to watch a trapeze artist without a net?
b. how long can you use the net before it breaks?
c. is trapeze more or less exciting to watch than gymnastics?
d. should trapeze artists wear red or blue outfits?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.