Abatter hits a pitched ball when the center of the ball is 1.31 m above the ground. the ball leaves the bat at an angle of 45° with the ground. with that launch, the ball should have a horizontal range (returning to the launch level) of 103 m. (a) does the ball clear a 8.55-m-high fence that is 93.0 m horizontally from the launch point? (b) at the fence, what is the distance between the fence top and the ball center?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly