In 1961, John Glenn became the first American to orbit the Earth. The altitude of his Mercury spacecraft was 100 miles (160 km) above the surface of the Earth. Determine the a) orbital velocity ofthe spacecraft. b) Determine the period of time for the Glenn's spacecraft spacecraft to orbit the Earth. Note: the radius of the Earth is 6.4 x 10 meters, the mass of the Earth is 6.0 x 10 kg and the universal gravitational constant is 6.67 x 10"N m/kg". ANS. a) 7.9 x 10' m/s, b) 5400 s E-7, P-17, 18 5-16

answer:   you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation:

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

radiation warms things up temp rises convection currents air circ windy weather

the answer is a. hope this .