In each cycle, a heat engine receives an input of 1540 J of heat and exhausts 1030 J of heat. What is the thermal efficiency?

0.274

0.456

0.669

0.331

Why was pluto recently reclassified as a dwarf planet? A. Pluto size had changed B. Scientists discovered the Pluto does no orbit the sun C. Scientists discovered other objects of a similar size in the solar system D.

A wheel of mass 60.0 kg is pushed with a net force of 26.4 N. Find acceleration.

If the forces acting upon an object are balanced, then the object A) All of these B) Might be stopped. C) Might be moving at a constant velocity D) Is not accelerating

What is the value of vEp? Select One of the Following (a) 345 mph (b) - 345 mph (c) 255 mph (d) 255 mph

A 12 kg cart is moving at the speed of. 25 m/s. After the speed of the cart is tripled the inertia of the cart will be.

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.