To be able to do work, a system must have _______
Fill in the blank(s) with correct word
energy
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___________ associations and ___________ associations are groups of stars born together but not gravitationally bound to one another
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A bucket of water with total mass 21.0 kg is attached to a rope, which in turn is wound around a 0.050-m radius cylinder, with crank, at the top of a well. The moment of inertia of the cylinder and crank is 0.21 kg m2 . The bucket is raised to the top of the well and released to fall back into the well. What is the kinetic energy of the cylinder and crank at the instant the bucket is moving with
a speed of 5.4 m/s? a. 4.8E+2 J b. 1.2E+3 J c. 3.1E+2 J d. 1.2E+4 J
If the radiant energy from the Sun comes in as a plane EM wave of intensity 1340 W/m2, calculate the peak values of E and B
a. 300 V/m, 10?4 T b. 1000 V/m, 3.35 × 10^?6 T c. 225 V/m, 1.60× 10?3 T d. 111 V/m, 3.00 × 10^?5 T e. 711 V/m, 2.37 × 10^?6 T
If y = 0.02 sin (30x - 400t) (SI units), the frequency of the wave is
a. 30 Hz b. 15/p Hz c. 200/p Hz d. 400 Hz e. 800p Hz