Why do the testes need to have a lower temperature than the rest of the body? if you want points then here you go i will mark brainliest to the person who answer this question right​
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Often called simply "velocity," this is the velocity of an object at a particular moment in time.

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?