A single-slit experiment uses light of wavelength 720. nm with a slit separation of 0.250 mm and a screen placed 2.7 m away
(a) What is the angular width of the central fringe? (b) What is the linear width of the central fringe on the screen? (c) What is the linear distance on the screen between the central maximum and the 1st order maximum?
(a) 5.76 × 10-3 radian
(b) 1.6 cm
(c) 1.2 cm
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What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s?
A) 1 m/s2 B) 2 m/s2 C) 3 m/s2 D) 4 m/s2 E) 5 m/s2
The kind of waves that travel fastest through a long metal rod have
A) short wavelengths. B) waves of medium length. C) long wavelengths. D) all have the same speed
A car travels a distance of 100 km. For the first 30 minutes it is driven at a constant speed of 80 km/hr. The motor begins to vibrate and the driver reduces the speed to 40 km/hr for the rest of the trip. The average speed for the entire trip is
A. 50.0 km/hr. B. 60.0 km/hr. C. 53.3 km/hr. D. 47.5 km/hr. E. 40.0 km/hr.
A 2.0 kg ball is attached to one end of a light rod that is 1.2 m long. The other end of the rod is loosely pinned at a frictionless pivot. The rod is raised until it is vertical, with the ball above the pivot
The rod is released and the ball moves in a vertical circle. The tension in the rod as the ball moves through the bottom of the circle is closest to: A) 20 N B) 40 N C) 60 N D) 80 N E) 100 N