1. suppose that you have two boxes one is 20 cm X 20 X 20 cm. The other is 20cm X 20 cm X 40 cm. a.) how does the pressure of the air on the outside of the two boxes compare?
b.) How does the magnitude of the total force of the air on two boxes compare?

2. In a certain internal combustion engine 0.0021 m^3 of the air at atmospheric pressure and 303 K is rapidly compressed to a pressure of 20.1 x 10^5 Pa and volume of 0.0003 m^3 what is the final temperature of the compressed gas?

3.) A tank truck takes a load of 45,725 L of gasoline in houstin where temp is 28.0 C the truck delivers its load in minneapolis where the temp is -12.0C
a.) how many liters of gas does the truck deliver
b.) what happened to the gas?

please help me answer one of these or all if you can its due tmro thank you so much

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?