a cosmic ray creates a muon in the earth's upper atmosphere that travels towards the earth at 0.998c. the muon exists for 3.16 ms when measured by an observer on earth. during its lifetime: a) how far does an observer on earth say the muon has traveled? b) find the lifetime of the muon as measured by an observer at rest with respect to the muon. c) how far does the muon say that it has traveled relative to earth?

What happens to the velocity of the car when the upward pull of the cable is greater than the downward pull of gravity as the car rises toward the top?

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2

Debris produced by mining is called