A person wearing a seatbelt can survive a car crash if the acceleration is smaller than 30 gees assuming constant negative acceleration how much most the car is front and collapse if it crashes into a brick wall at 60 mph in the occupants are to survive

How are calculation for velocity and speed different

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.