The output of a generator is 440. V at 20. A. It is to be transmitted on a line with resistance of 0.60 ?. To what voltage must the generator output be stepped up with a transformer

if the power loss in transmission is not to exceed 0.01% of the original power?
A) 4.4 kV
B) 4.4 × 105 V
C) 44.5 kV
D) 22. kV
E) 72.7 kV


C

Physics & Space Science

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Projectile Motion: A projectile is fired from the edge of a cliff as shown in the figure. The initial velocity components are 940 m/s (horizontal) and 96 m/s (vertical). The projectile reaches maximum height at point P and then falls and strikes the ground at point Q. How high is point P above point Q, assuming no air resistance?

A. 470 m B. 490 m C. 45,000 m D. 940 m E. 90,000 m

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Other things being equal, the pole-vaulter having the greatest ________ energy prior to going into the jump should jump the highest.

Fill in the blank(s) with the appropriate word(s).

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Which of the following is an outer planet?

A. Mars B. Jupiter C. Earth D. Venus

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A solid nonconducting sphere (radius = 12 cm) has a charge of uniform density (30 nC/m3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the center of the sphere

a. 22 N/C b. 49 N/C c. 31 N/C d. 87 N/C e. 26 N/C

Physics & Space Science