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Apr
5
answered Why don't we hear sound reflecting from buildings, mirrors, etcetera?
Sep
18
answered When I boil a kettle, what stops all the water from turning (exploding!) in to steam in one go once it reaches 100°C?
Jul
9
answered Why is displacement negative during free fall?
Jul
9
asked Special relativity: where does this naive calculation go wrong?
Apr
8
answered Why isn't jumping from a high altitude fatal?
Apr
7
answered Why does a cup with 100 g water float when placed on another cup with 50 g of water?
Mar
18
answered How do we know that $F = ma$, not $F = k \cdot ma$
Nov
27
answered Photons from stars--how do they fill in such large angular distances?
Nov
16
answered Why does a helium filled ballon move forward in a car when the car is accelerating?
Oct
24
answered Where does the extra force generated by a lever come from?
Jul
31
answered Force on carabiner from free fall
Jul
12
answered How can you weigh your own head in an accurate way?
Jul
4
answered Does ABS shorten stopping distance of a car?
Jul
2
answered Help with buoyant forces and liquids (high school physics)
Jun
26
answered What's a “noninertial frame”?
Jun
26
answered How can a human eye focus on a screen directly in front of it?
Jun
23
answered Is my boss wrong about our mechanical advantage from our pulley system?
Jun
21
answered Does a car consume more fuel when it's raining?
Jun
13
answered How can Magnets be used to pick up pieces of metal when the force from a magnetic field does no work?
May
22
answered Quantum mechanics and everyday nature