What is the change in internal energy if 50 J of heat are released from a system, and the system does 80 J of work on its surroundings?

Which is not true of the weak nuclear force

If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.|v0|=nothingm/s.

What tool is used in laboratories for measuring mass of an object? Select all that apply. scale equal arm balance triple Beam balance graduated cylinder

A boy standing on a 19.6 meter tall bridge sees a motorboat approaching the bridge at a constant speed. When the boat is 27 meters from the bridge, the boy drops a stone to the water below. If the stone strikes the water 3.

Anna throws a ball horizontally off her apartment balcony at a speed of 6.0 meters/second. If the ball falls 10 meters from the balcony to the base of the apartment, calculate how long it takes the ball to reach the base

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.

How the behavior of waves is affected by a medium

Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gravitational force between them?

Why did the work of Rutherford and Marsden convince many scientists that the 'plum pudding' model of the atom was incorrect?