20. (5 points) An unemployed science teacher decided to make a
house out of 2" (5 cm) pink foam
board. He made the house in the
shape of a box that was 3 meters
long, 2.6 meters wide, and 2 meters
high. How much power will an
electric heater need to keep the
house at 22°C (72°F) if the outside
air temperature is -2°C. You can
assume that the heat loss from
conduction is the main factor. (W)
[kpink foam = 0.03 W/m/°C]

Ajogger accelerates from rest to 4.86 m/s in 2.43 s. a car accelerates from 20.6 to 32.7 m/s also in 2.43 s. (a) find the magnitude of the acceleration of the jogger. (b) determine the magnitude of the acceleration of the car. (c) how much further does the car travel than the jogger during the 2.43 s?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.