A baseball leaves the bat with a speed of 47 m/s and an angle of 45° above the horizontal. A 5.0-m-high fence is located at a horizontal distance of 137 m from the point where the ball is struck. Assuming the ball leaves the bat 1.0 m above ground level, by how much does the ball clear the fence?
a. 59.7 m
b. 47.7 m
c. 49.7 m
d. 121 m
c
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A 1.500 m long uniform beam of mass 30.00 kg is supported by a wire as shown in the figure. The beam makes an angle of 10.00 degrees with the horizontal and the wire makes and angle of 30.00 degrees with the beam. A 50.00 kg mass, m, is attached to the end of the beam. What are the vertical and horizontal components of the force of the wall on the beam at the hinge?
A. H = 1,458 N, V = 454.0 N
B. H = 1,300 N, V = 403.4 N
C. H = 1,179 N, V = 354.9 N
D. H = 979 N, V = 324.5 N
E. H = 750 N, V = 297.3 N
Which of the following statements about Earth's troposphere is not generally true?
A) It is the layer of the atmosphere in which ozone absorbs dangerous ultraviolet light from the Sun. B) It is the lowest layer of the atmosphere. C) It is the layer of the atmosphere in which convection plays the most important role. D) It is a layer of the atmosphere in which temperature declines with increasing altitude.
Consider the interference colors in a film of gasoline on a wet street. The water provides a
A) means of spreading the gasoline into a thin film. B) means of slowing the rapid evaporation of gasoline. C) chemical bond with the gasoline. D) second reflecting surface. E) all of the above
A sound wave coming from a tuba has a wavelength of 1.10 m and travels to your ears at a speed of 253 m/s. What is the frequency of the sound you hear?
a. 278 Hz b. 1/278 Hz c. 230 Hz d. 1/230 Hz e. 252 Hz