When a star becomes a red giant, its core expands to a roughly proportional larger size too
Indicate whether the statement is true or false
FALSE
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Energy in the Electric Field: A uniform electric field has the strength of 7.0 N/C. What is the electric energy density of this field? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 2.2 × 10-10 J/m3 B. 3.1 × 10-11 J/m3 C. 2.8 × 1012 J/m3 D. 5.5 × 1012 J/m3
An ac generator contains 80 flat rectangular loops of wire, each of which is 12 cm long and 8 cm wide. The loops rotate at 1200 rpm about an axis through the center and parallel to the long side
If the magnetic field in which the loop rotates is uniform, has magnitude 0.30 T, and is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? A) 20 V B) 27 V C) 35 V D) 29 V
A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2. What is the mass of the car?
A) 500 kg B) 1000 kg C) 1500 kg D) 3000 kg E) none of these
You throw a ball straight up. As the ball is going up, the direction of the velocity and acceleration point __________
Fill in the blank(s) with correct word