What would the gforce be on a seat belted individual in a crash where Car one is hit by car 2 and driven into car 3 at a speed of 0-42 mph in less than 1/2 sec

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =