A 0.28-kg stone you throw rises 34.3 m in the air. The impulse the stone receives from your hand while being thrown is
a. 2.7 Ns, up.
b. 2.7 Ns, down.
c. 7.3 Ns, up.
d. 7.3 Ns, down.
e. 9.6 Ns, up.
C
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Liquid metallic hydrogen is found in the interior(s) of
a. Uranus. b. Neptune. c. Uranus and Neptune. d. neither Uranus nor Neptune.
According to Bernoulli's equation, the pressure in a fluid will tend to decrease if its velocity increases. Assuming that a wind speed of 1 m/s causes a pressure drop of 0.645 Pa, what pressure drop is predicted by Bernoulli's equation for a wind speed of 5 m/s?
A. 1.29 Pa B. 3.325 Pa C. 16.125 Pa D. 1.94 Pa
If the voltage across a resistor is doubled, the current will
a. remain the same. b. be cut to one-fourth. c. be cut in half. d. be doubled. e. be quadrupled.
Three charged particles are arranged on corners of a square as shown in Figure OQ23.11, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner. What is the direction of the electric field at the upper right corner, which is a point in empty space?