Air pressure is 1.00 × 10^5 N/m2, air density is 1.30 kg/m3, and the density of soft drinks is 1.00 × 10^3 kg/m3 . If one blows carefully across the top of a straw sticking up 0.10 m from the liquid in a soft drink can, it is possible to make the soft drink rise half way up the straw and stay there. How fast must the air be blown across the top of the straw?
a. 0.036 m/s
b. 27 m/s
c. 1.4 m/s
d. 19 m/s
e. 750 m/s
b
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A supermassive black hole that is erupting____
a. will consume all gas and dust in the galaxy b. will heat the gas in the cluster until it all escapes c. is fed by the intergalactic gas of the cluster d. may push its accretion disk away and choke off the eruption e. will push other galaxies away from its parent galaxy
The inductance of a tuning circuit of an AM radio is 4.00 mH. Find the capacitance of the circuit required for reception at 1200 kHz.
A. 2.10 pF B. 4.40 pF C. 21.2 pF D. 43.4 pF E. 27.6 pF
Orientation counts; if looking down the jets of an active core, we see a blazar
Indicate whether the statement is true or false
If object A has more mass than object B,
a. A will weigh more than B. b. A will be harder to accelerate than B. c. A will be harder to keep moving in a circle. d. all of the above