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.
A
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Banked Curves: The curved section of a speedway is a circular arc having a radius of 190 m. This curve is properly banked for racecars moving at 34 m/s. At what angle with the horizontal is the curved part of the speedway banked?
A. 32° B. 34° C. 30° D. 28° E. 26°
A concave mirror has a focal length of 20 cm. What is the magnification if the object's distance is 100 cm?
A. 1/2 B. 1/4 C. ?2 D. 4 E. ?1/4
Two closely spaced parallel glass plates are separated by 977 nm. What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?
a. 651 nm b. 695 nm c. 655 nm d. 618 nm e. 601 nm
Which of the following are vectors?
(i) your age (ii) your height (iii) acceleration (iv) velocity (v) speed (vi) mass
1.(iii) and (iv) 2.(iii), (iv), and (v) 3.(i), (ii), and (vi) 4.all of these