A child accelerates at 2.0 kg toy from rest to 4.0 m/s in 8 seconds. What is the force exerted by the child on the toy? O IN
0 0,5N
O4N
O8N

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?