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Question
A known toy consists of an aligned row of identical steel balls that are suspended by mono?lament so they just touch. When balls collide collisions are very close to completely elastic. When two balls are lifted from one end together and released, two balls pop out from the other end. If in its place one ball popped out with twice the speed of the initial set of two balls, what law of physics would be violated?
1. Conservation of Angular Momentum
2. Conservation of Energy
3. Conservation of Rotational Inertia
4. Newton’s Third Law
5. Conservation of Mass
6. Newton’s Second Law
7. Newton’s First Law
8. Management of Momentum
A variable-speed drill, initially turning at 300 rpm, speeds up to 1300 rpm in a time interval of 0.3 s
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A hot-air balloon is ascending at the rate of 12 m/s and is 84 m above the ground when a package is dropped over the side. Explain how long does the package take to reach the ground?
A long jumper leaves the ground at 45 above the horizontal and lands 8.2 away. What is her "takeoff" speed
A source produces sound waves of time period .001 second and wave length of 20 cm. find the time taken by sound waves to travel a distance of 800 metres.
A structural I beam is made of iron. A view of its cross-section and its dimensions is shown in the figure, where d = 2 cm, w = 29 cm, h = 30 cm, How many atoms are there in this section
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2 mol of He gas initially at STP are sealed in a cylinder with a movable piston. Heat is extracted from the gas until it reaches a temperature of 100 K. What is the thermal efficiency of this engine
A 6.0kg crate is pushed from the top of an incline and travels down the incline with an initial speed of 8m/s.find loss of potential energy
Physics: Speed of car at bottom of driveway; initial speed of bullet, 20 A 2.10 x 10³ kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20° with the horizontal. If an average friction force of 4.0 x 10³ N impedes the mo..
A pair of oppositely charged parallel plates are separated by a distance of 5 cm with a potential difference of 550 V between the plates. A proton is released from rest at the positive plate at the equal time that an electron is released from rest..
Explain by how much time is required for the bullet to reach the target? Using the approximate value of g = 10 m/s2, how far does the bullet fall in this time?
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