A closed 2.0-L container holds 3.0 mol of an ideal gas. If 150 J of heat is added, what is the change in internal energy of the system?

a. zero
c. 150 J
b. 100 J
d. 200 J


C

Physics & Space Science

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Gravitational Potential Energy: A projectile is shot straight up from the surface of Earth by means of a very powerful cannon and experiences no appreciable air resistance. If the projectile reaches a height of 35,000 m above Earth's surface, what was the speed of the projectile when it left the cannon? (G = 6.67 × 10-11 N ? m2/kg2, the radius of Earth is 6.38 × 106 m, and Mearth = 5.97 ? 1024 kg)

A. 355 m/s B. 505 m/s C. 827 m/s D. 710 m/s E. 906 m/s

Physics & Space Science

When an artery gets a constricted region due to plaque, how does the pressure in this region compare to the pressure in an unconstricted region adjacent?

a. Since this is a closed system, the pressure is the same in both regions. b. In the constricted region the blood moves at a higher speed than in the unconstricted region, resulting in an increased pressure. c. In the constricted region the blood moves at a higher speed than in the unconstricted region, resulting in a decreased pressure. d. In the constricted region the blood moves at a lower speed than in the unconstricted region, resulting in an increased pressure.

Physics & Space Science

Consider a situation where two moving objects collide, stick to each other, and move off together. For a body oscillating at the end of a spring, the energy is only elastic potential energy

Indicate whether the statement is true or false

Physics & Space Science

A change in the direction of a wave resulting from its meeting an opaque material is called ______________

Fill in the blank(s) with correct word

Physics & Space Science