Projectile Motion: A child throws a ball with an initial speed of 8.0 m/s at an angle of 40° above the horizontal. The ball leaves her hand 1.0 m above the ground and experiences no appreciable air resistance as it moves.(a) How far from where the child is standing does the ball hit the ground?(b) How long is the ball in flight before it hits the ground?(c) What is the magnitude of the ball's velocity just before it hits the ground?

What will be an ideal response?


(a) 7.5 m (b) 1.2 s (c) 9.1 m/s

Physics & Space Science

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_____ is a method for expressing very large or very small numbers by using powers of 10

A) Scientific notation B) The octal numeral system C) The binary number system D) Theoretical notation

Physics & Space Science

Diffraction Gratings: Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?

A. 0.93 ?m B. 1.4 ?m C. 2.8 ?m D. 8.5 ?m

Physics & Space Science

Light of wavelength 687 nm is incident on a single slit 0.75 mm wide. At what distance from the slit should a screen be placed if the second dark fringe in the diffraction pattern is to be 1.7 mm from the center of the diffraction pattern?

A) 0.39 m B) 0.47 m C) 0.93 m D) 1.1 m E) 1.9 m

Physics & Space Science

The number of neutrons in a triton is ______________

Fill in the blank(s) with correct word

Physics & Space Science