A 250 Kg cast iron car engine contains water as a coolant. Suppose the temperature of the engine is 35°C when it is shut off. The air temperature is 10°C. The heat given off by the engine and water in it, as they cool to air temperature is 4.4x106 J. What mass of water is used to cool the engine?

An astronaut floating in space is trying to use her jetpack to get back to her space station, but she is being pulled away by a nearby planet, as shown in the image below. her jetpack provides a constant thrust of 310 n. if she angles her jetpack in such a way that it cancels out the vertical force due to the planet's gravity, what is her net horizontal force? thaud 487 o a. 54.8 n toward the space station o b. 212.9 n toward the space station o c. 185.2 n toward the space station o d 956 n toward the space station