Holden is trying to determine the velocity of his race car. he went 20 meters east, turned around, and went 40 meters west. he turned the car one more time and went 35 meters east. his car was 15 meters from the starting line. this took 5 seconds.

what is the car’s velocity?
a. 3 m/s west

b.3 m/s east

c. 19 m/s west

d. 19 m/s east

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

More solar radiation is absorbed by earth’s surface than by