What is the change in internal energy if 60 J of heat are added to a system

and the system does 40 J of work on its surroundings? Use AU = Q-W.

Why is radio invented?

Calculate the average speed (in m/s) of a cheetah that runs 140 meters in 5 seconds

Give two examples of when you would need to use the measure skill in science?

How much time would it take for an airplane to reach its destination if it traveled at an average speed of 790 km/hr for a distance of 4,700km? What is the airplane's speed in miles/hour?

Which of the following people would NOT be able to run for president under the Constitution? A-a 37-year-old black woman B-the governor of Hawaii, born in Japan C-an 80-year-old man with only an elementary school education D-all would be eligible

If you place 0◦C ice into 0◦C water in an insulated container, what will the net resultbe? Will there be less ice and more liquid water, or more ice and less liquid water, orwill the amounts stay the same? Explain.

At what speed would a car have to move in order to travel 20 kilometers in two hours?

Find the equivalent resistance Req between terminals a and b if terminals c and d are open and again if terminals c and d are shorted together. (Round the final answers to two decimal places.) With terminals c-d open, Req = Ω.

Which of these shows unbalanced forces at work on an object? A. an ice skater turning as he skates around an ice rink B. a bicycle chained to a bike rack at school C. a car driving at a constant 25 miles per hour on a straight street D.

A 4.25 kg block is sent up a ramp inclined at an angle theta=37.5° from the horizontal. It is given an initial velocity?0=15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is? k=0.