A karate expert executes a swift blow and splits a cement block with her hand. The force is high since the momentum is decreased

momentum is increased

mass of the block is so high

time of impact is so low

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?