Waves propagate at 7.40 m/s along a stretched string. The end of the string is vibrated up and down once every 2.25 s. What is the wavelength of the waves that travel along the string?
a. 4.50 m
b. 16.7 m
c. 3.29 m
d. 37.5 m
e. 8.09 m
b
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A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 200 m
What are the magnitude and direction of the net force applied to the car to bring it to rest? A) 1.00 N north B) 10.0 × 103 N south C) 1.00 × 103 N south D) 1.00 N south E) 100 N south
__________ in an x ray spectrum of an atom occurs because of rapid deceleration of the bombarding electrons
Fill in the blank(s) with correct word
Long period comets are thought to reside mainly in the:
A) asteroid belt. B) Kirkwood gaps. C) Kuiper Belt. D) Oort Cloud. E) Interstellar Medium.
Pressure in a Liquid: A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A water-filled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The water pressure at ground level in the hose is closest to which of the following values? The density of water is 1000 kg/m3.
A. 3.9 × 105 N/m2 B. 2.0 × 104 N/m2 C. 9.2 N/m2 D. The question cannot be answered because the cross sectional area of the tank is needed.