A known weight W is supported at B by two separate cables, AB and BC. Later cable BD with known tensile force TBD 5 W/2 is added to prevent oscillations. The force in cable AB, TAB, is (in terms of weight W):
(A) 20.98W
(B) 0.96W
(C) 20.84W
(D) 20.76W
(D) 20.76W
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What affects the average orbital speed of a star in our galaxy?
A) the star's mass and the mass of the galaxy B) the mass of the galaxy inside its orbit and the size of its orbit C) the mass and age of the star D) the mass and age of the galaxy
Bronco's speed increases after he dives from a hovering helicopter. Relative to an observer in the helicopter Bronco's momentum
A) also increases. B) remains unchanged. C) decreases.
A loop of wire (resistance = 2.0 m?) is positioned as shown with respect to a long wire which carries a current. If d = 1.0 cm, D = 6.0 cm, and L = 1.5 m, what current is induced in the loop at an instant when the current in the wire is increasing at a rate of 100 A/s?
a.
34 mA
b.
30 mA
c.
27 mA
d.
38 mA
e.
0.50 mA
The change in entropy of a mass m of a solid substance which has a latent heat of fusion L and melts at a temperature T is
a. LT/m b. mL ln(T) c. mLT d. mL/T e. L/mT