Imagine a Carnot engine has a hot reservoir of 680 K and a cold reservoir of 220 K. What is the efficiency of the engine?

What type of disorder is myasthenia gravis? A. Immune disorder B. Inflammatory disorder C. Structural disorder D. Infectious disorder

In what way is a screw similar to an inclined plane?

Which of the following statements is false? A. Two or more different substances combine physically to form a mixture. B. Two or more different atoms combine chemically to form an element. C. Two or more elements combine chemically to form a compound.

Match each number to how it would appear in scientific notation. A. 2,500 2.5 * 10-1 B. 25 2.5 * 10-3 C. 0.0025 2.5 * 103 D. 0.25 2.5 * 101

Why is chemical energy a part of all chemical reactions?

In a polar covalent bond

Lindsay is late to class and is running down the hallway at a speed of 2 m/s the length of the hallway is 150 meters. How long will it take her to run down the hallway?

Which of the following is evidence that groundwater causes erosion and deposition?

Changing the direction of current will or will not affect the strength of an electromagnet

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3