A surveyor’s laser-ranging device measures a time interval of 8.0x10-7 s for a laser light pulse to make a round trip from a marker. What is the round-trip distance? Speed of the laser = 3x108 m/s

the answer is b i think

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it