You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?

a. 45°
b. 23.4°
c. 39°
d. 51°
e. The answer depends on the day of the year.


c

Physics & Space Science

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According to Einstein's special theory of relativity, when compared to an identical clock at rest, a clock moving with constant velocity will run

(a) Slow (b) Fast (c) At the same rate (d) Alternately fast and slow

Physics & Space Science

Imagine a planet like Earth orbiting the Sun, at an average distance of 1 AU but with a highly eccentric orbit. Which of the following statements about this orbit is not true?

A) The period is longer than a year. B) The seasons are very extreme. C) The planet is sometimes very close to the Sun, and sometimes very far. D) The planet does not maintain a constant speed around the Sun.

Physics & Space Science

A baseball player throws a ball straight up into the air. At a height of 3.00 m above the release point, the ball is moving at 1.25 m/s. What was the ball's initial speed?

a. 7.56 m/s b. 7.77 m/s c. 57.2 m/s d. 60.4 m/s

Physics & Space Science

A steel pipe (d3 5 104 mm, d2 5 96 mm) has a plastic liner with inner diameter d1 5 82 mm. The modulus of elasticity of the steel is 75 times that of the modulus of the plastic. Allowable stresses in steel and plastic are 40 MPa and 550 kPa, respectively. The allowable bending moment for the composite pipe is approximately:

(A) 1100 N?m
(B) 1230 N?m
(C) 1370 N?m
(D) 1460 N?m

Physics & Space Science