A heat engine does 300 J of work during one cycle. In this cycle 900 J of energy is wasted.

What is the efficiency of the engine?

A. 0.25

B. 0.33

C. 0.50

D. 0.75

How would you expect energy to change her in a chemical reaction? Energy will be increased Energy Will be decreased Energy will be converted into another form Energy will be consumed

Boy pulls a 5.0-kg sled with a rope that makes a 60.0° angle with respect to the horizontal surface of a frozen pond. The boy pulls on the rope with a force of 10.0 N; and the sled moves with constant velocity.

Maisie drags a 1kg mass along a table with a Newton meter so that it accelerates at 0.25 m/s. The Newton-meter reads 0.4N, calculate the force of friction between the mass and the table

Astronaut rachel leaves earth in a spaceship at a speed of 0.960c relative to an observer on earth. rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year).

Particle 1 carrying - 4.0 μC of charge is fixed at the origin of an xy coordinate system, particle 2 carrying + 8.0 μC of charge is located on the x axis at x = 4.0 m, and particle 3, identical to particle 2, is located on the x axis at x = - 4.0 m.

In deep space there is very little friction once they are launched into a probe into deep space where there are no external forces acting on it scientists shut the probe's engines off because the scientists want the probe to

What topic in a biology textbook is directly related to physics

A soccer ball player bounces the ball off her head, changing the velocity of the ball. She changes the x-component of the velocity of the ball from vix = 7.9 m/s to vfx = 5.9 m/s and the y-component from viy = - 3.4 m/s to vfy = 4.5 m/s.

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.