How much heat is produced in the 10-? resistor in 5.0 s when ? = 18 V?
a.
72 J
b.
32 J
c.
50 J
d.
18 J
e.
90 J
d
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Florence, who weighs 120 lb, stands on a bathroom scale in an elevator. What will she see the scale read when the elevator is accelerating upward at 2.0 m/s2?
A) 86 lb B) 1.4 × 102 lb C) 96 lb D) 1.2 × 102 lb E) 1.6 × 102 lb
An electron which moves with a speed of 7.5 × 10^3 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6 × 10^-19 C)
a. 1.9 × 10^-15 N c. 2.2 × 10^-24 N b. zero d. 4.8 × 10^-14 N
One of the first tests of the general theory of relativity was the ____
a. description of the orbit of the moon b. determination of the speed of light as a constant c. change in mass of a particle moving at a high speed d. demonstration of a hammer and a feather falling at the same rate on the moon e. determination of the rate of advance of the perihelion of Mercury's orbit
A +7.00 ?C point charge and -9.00 ?C point charge are placed along the x-axis at x = 0.000 cm and x = 40.0 cm, respectively
Where must a third charge, q, be placed along the x-axis so that it does not experience any net electric force due to the other two charges? A) -0.200 m B) 2.99 m C) -0.187 m D) -2.99 m E) 0.187 m