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Determine the change in the internal energy of a system that absorbs 327 cal of thermal energy while doing 750 J of external work. Answer in units of J.
A lightbulb has a resistance of 260 when operating witha potential difference of 130 V. What is the current in the light bulb
Four Identical masses of 500.0g are placed at the corners of a square, distance 0.50 m apart. Find the magnitude of net gravitational force exerted by three masses
A movie projector is equipped with a 0.6-meter focal length lens that is positioned 0.605 meters from the film. How many times larger is the image than the object
Water flowing through a garden hose of diameter2.70cm fills a20.0-L bucket in1.30min. what is the speed of the water leaving the nozzle
The width of the ribbon normal to a radius vector originationg at the star's center is much greater than the thickness of the ribbon in the radial direction.
q1. a projectile is fired horizontally from a gun that is 48.0 m above flat ground emerging from the gun with a speed
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
A baseball (m = 137 g) approaches a bat horizontally at the speed of 40.6m/s (91 mi/h) and is hit straight back at a speed of 45.1m/s (101 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the..
A refracting telescope with a lens whose diameter is 33.0 cm is used to view a binary star system that emits light in the visible region. what is the distance between the two stars
a ball starts from rest and rolls down a hill with uniform acceleration traveling 150 m during the second 5.0 s of its
A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the tooth is formed 11.0 cm behind the mirror. Determine the mirror's radius of curvature
The electric field midway between two equal but opposite point charges is 845 N/C, and the distance between the charges is 16.0 cm. What is the magnitude of the charge on each
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