Explain why machine can"t be

100% efficient practically?

What is virtue theory?

What happens at the anode of an electrolytic cell? a. electrons are given up c. electrons are formed b. electrons are accepted d. electrons form bonds

What is the name of the portion of an object movement that combines to give the resulting movement?

With the air density set to 0 kg/m3 (vacuum), what is the relationship between the mass and radius of the ball and its acceleration?

An unbalanced electric charge is sometimes called a

As a fire truck approached Mary, the pitch of the siren got higher. once the fire truck passed and moved away, the sirens pitch got lower. this change in pitch is because in the sound waves

Find the magnitude of the sum of these two vectors

Light waves that cross from an air medium to a water medium will A. O be focused into a straight line. B. O lose energy and dissipate. C. O change length and direction. D. O reflect off the water's surface.

What is a possible cost of using nonrenewable energy resources? A. Costs more money B. Less water pollution C. Sustainable energy D. Greenhouse gases

Kara is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take? A. She should get the Sun to travel around Earth again. B.