Not taking dark energy into account, we seem to live now in a matter dominated universe, since the observed matter density exceeds the observed energy density
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TRUE
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A steel lift column in a service station is 4.0 m long and 0.20 m in diameter. Young's modulus for steel is 20 × 1010 N/m2. By how much does the column shrink when a 5000-kg truck is on it?
A) 4.7 × 10-7 m B) 8.0 × 10-7 m C) 3.2 × 10-6 m D) 7.8 × 10-6 m E) 3.1 × 10-5 m
A series RLC circuit contains a 20.0-V resistor, a 0.750-mF capacitor, and a 120-mH inductor. If a sinusoidally varying rms voltage of 120 V at f = 500 Hz is applied across this combination of elements, what is the rms current in the circuit?
1.2.33 A 2.6.00 A 3.10.0 A 4.17.0 A 5.none of those answers
A ball thrown upwards reaches a maximum height and then comes back down to the original level. When a body moves in circular motion at constant speed the velocity and acceleration point in opposite directions
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If two sounds are at slightly different frequencies, beats can be heard at a frequency equal to the difference in frequency of the two sources
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