Physics, 07.10.2019 23:00 anaroles04
Arobotic rover on mars finds a spherical rock with a diameter of 10 centimeters [cm]. the rover picks up the rock and lifts it 20 centimeters [cm] straight up. the resulting potential energy of the rock relative to the surface is 2 joules [j]. gravitational acceleration on mars is 3.7 meters per second squared [m/s2]. what is the specific gravity of the rock?
Answers: 3
Physics, 22.06.2019 02:00
Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules
Answers: 2
Physics, 22.06.2019 10:00
Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.
Answers: 1
Physics, 22.06.2019 14:30
Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?
Answers: 2
Arobotic rover on mars finds a spherical rock with a diameter of 10 centimeters [cm]. the rover pick...
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