If a heat engine pulls 4390.0 J of heat from the hot reservoir and exhausts 3582.2 J of heat to the cold reservoir, what was the work done by the engine? What is the efficiency of this engine in percent? (do not enter the percent sign)

Which of the following best explains how physical science is at the root of other sciences? A. Physical science is the study of everything. B. Physical science includes physics, chemistry, biology, and geology. C.

What kind of waves require a medium to travel? Question 6 options: Light Waves Mechanical waves All waves need a medium to travel Electromagnetic waves

A flock of geese is flying south for the winter. In order to maintain a "V" shape, each goose is flying at the same constant velocity.

How can I get the temperature? Sound Speed = 331 m/s + (0,6xTemperature)

What type of rock is limestone? Describe how a limestone rock is likely to change over a long period of time.

Two uncharged metal spheres, #1 and #2, are mounted on insulating support rods. A third metal sphere, carrying a positive charge, is then placed near #2. Now a copper wire is momentarily connected between #1 and #2 and then removed.

Which waves can travel through a vacuum? A) light waves Eliminate B) ocean waves C) sound waves D) mechanical waves

Select the statement that best describes gravity. Gravity is the force that draws objects closer to the Earth because of the positive or negative charge.

A cylindrical metal rod is 2.40 m long and 5.99 mm in diameter. The resistance between its two ends (at 20oC) is 1.38 * 10-3 Ω. (a) What is the material? (b) A round disk, 2.24 cm in diameter and 1.20 mm thick, is formed of the same material.

Two cars are moving in the same direction in parallel lanes along a highway. At some instant, the velocity of car A exceeds the velocity of car B. Does that mean that the acceleration of car A is greater than that of car B? Explain.