Coffee is served at a restaurant before you are ready to drink it. To be hottest when you are ready to drink it, you should add cream
A) right away.
B) at any time.
C) when you are ready to drink the coffee.
Answer: A
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The difference between the pressures inside and outside a tire is called the absolute pressure
a. True b. False Indicate whether the statement is true or false
What are the standard units for luminosity?
A) watts B) joules C) newtons D) kilograms E) watts per second
An astronomical telescope is made with lenses of focal lengths 80.0 and 1.25 cm. What magnifying power does this telescope provide?
A. 10 B. 81 C. 79 D. 64 E. 41
A disk of mass m moving in the positive x direction collides with a stationary disk, also of mass m. The first disk moves in a direction ?1 with respect to the x axis, and the second disk moves off in a direction of ?2 below the x axis, as shown in the figure
If v = 10 m/s, ?1 = 30°, and v1f = 8 m/s, what is v2f?
a.
6.9 m/s
b.
6.1 m/s
c.
2.0 m/s
d.
8.7 m/s