We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)

What air masses form in the tropics and have low pressure?

Which are examples of negative feedback? check all that apply. a child whose thymus gland is building an immune system that gets stronger each day when someone's adrenal gland reacts to a scary movie by secreting hormones that make the heart beat

Draw conclusions: based on what you have learned about mass and weight, why do you think the mass did not change but the weight did?

A space vehicle with a mass of 104,328 kg is at an altitude of 45.0 km when its boosters separate. What is the potential energy? Express your answer in scientific notation. a) 4.6 x 106 J b) 4.7 x 106 J c) 4.6 x 107 J d) 4.6 x 1010 J

Is the consumer an important component of food product development?

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.