Fluid Flow: When you blow some air above a paper strip, the paper rises. This happens because

A. the air above the paper moves faster and the pressure is higher.
B. the air above the paper moves faster and the pressure is lower.
C. the air above the paper moves faster and the pressure remains constant.
D. the air above the paper moves slower and the pressure is higher.
E. the air above the paper moves slower and the pressure is lower.


Answer: B

Physics & Space Science

You might also like to view...

Constant Acceleration Kinematics: A bicyclist starts a timed race at 6.0 mi/h. In order to win, he must average 21 mi/h. Assuming constant acceleration from the start, how fast must he be traveling at the end of the race?

A. 36 mi/h B. 30 mi/h C. 24 mi/h D. 42 mi/h

Physics & Space Science

In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power? (c = 3.00 × 108 m/s, Wien displacement law constant equals 2.90 × 10-3 m ? K, ? = 5.670 × 10-8 W/m2 ? K4)

A) 1.0 × 1014 Hz B) 8.0 × 1014 Hz C) 2.3 × 1014 Hz D) 6.7 × 1014 Hz E) 4.1 × 1014 Hz

Physics & Space Science

An object of mass m moving at speed v0 strikes an object of mass 2m which had been at rest. The first object bounces backward along its initial path at speed v0 . Is this collision elastic, and if not, what is the change in kinetic energy of the system?

a. The collision is elastic. b. The kinetic energy decreases by mv2. c. The kinetic energy decreases by mv2/2. d. The kinetic energy increases by mv2.

Physics & Space Science

What current is flowing in a resistor if 4.0 × 1016 electrons pass a point in the resistor in 0.50 s? (e = 1.60 × 10-19 C)

A) 0.013 A B) 78 A C) 0.31 A D) 6.3 A

Physics & Space Science