Why do we have seasons on Earth?
a) Season are caused the Sun moving through the constellations of the zodiac
b) the spin axis of the Earth titled 23.5 with respect to a line normal to the plane of orbit
c) the earth's distance from the Sun varies, so that it is summer the we are closer to the Sun and winter when we are farther from the Sun
The spin axis of the Earth is titled 23.5 with respect to a line normal to the plane of orbit
b) the spin axis of the Earth titled 23.5 with respect to a line normal to the plane of orbit
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Parallel Wires: Two long parallel wires that are 0.30 m apart carry currents of 5.0 A and 8.0 A in the opposite direction. Find the magnitude of the force per unit length that each wire exerts on the other wire and indicate if the force is attractive or repulsive. (?0 = 4? × 10-7 T ? m/A)
A. 2.7 × 10-5 N repulsive B. 7.2 × 10-5 N repulsive C. 3.4 × 10-5 N attractive D. 2.7 × 10-5 N attractive E. 7.2 × 10-5 N attractive
A conducting bar slides without friction on two parallel horizontal rails that are 50 cm apart and connected by a wire at one end
The resistance of the bar and the rails is constant and equal to 0.10 ?. A uniform magnetic field is perpendicular to the plane of the rails. A 0.080-N force parallel to the rails is required to keep the bar moving at a constant speed of 0.50 m/s. What is the magnitude of the magnetic field? A) 0.10 T B) 0.25 T C) 0.36 T D) 0.54 T E) 0.93 T
Only type O stars are hot enough to show ionized ________ in their spectra
Fill in the blank(s) with correct word
Capacitors in Combination: Three capacitors of capacitance 5.00 ?F, 10.0 ?F, and 50.0 ?F are connected in series across a 12.0-V potential difference (a battery).(a) How much charge is stored in the 5.00-?F capacitor?(b) What is the potential difference across the 10.0-µF capacitor?
What will be an ideal response?