An exoplanet probe is designed to measure the concentration of ch4(g) in the atmosphere of an extrasolar planet. the acceleration of gravity on this planet at the elevation of interest is 45 m s-2 and the atmospheric temperature in the region of interest is 348 k. fill the blank: the natural variation in ch4(g) concentration over a 1-kilometer vertical distance due to the change in gravitational potential energy is % km-1

note: required precision is 1% sanity check: the answer is a percentage so the value should be between 1 and 99.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?

During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver