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A cannon has a barrel 5 m long and fires a 49 kg projectile with a muzzle velocity of 452 m/s. What is the average force on the projectile?
A battery having an emf of 9.80 V delivers 109 mA when connected to a 60.0 load. Determine the internal resistance of the battery
The temperature of the surface of a certain star is 7500 K. Most hydrogen atoms at surface of the star are in the electronic ground state. What is the approximate fraction of hydrogen atoms that are in the first excited state (and therefore could ..
A ball rolling along at speed v without slipping on a horizontal surface while it comes to a hill that rises at a constant angle above the horizontal.
on a ferris wheel with a 15 m radius, going one loop every 7 seconds, what is the acceleration? What is the ratio of your true weight vs apparent weight
A 0.246-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 36.1%, What is the average current supplied to the car\'s motor?
A thin film of oil (n = 1.27) is located on smooth, wet pavement. When viewed perpendicular to the pavement, How thick is the oil film
A trapeze artist swings in simple harmonic motion with a period of 4.2s. The acceleration of gravity is 9.81m/s2. Compute the length of the cables supporting the trapeze.
One argument against Darwin's theory of evolution draws upon the second law of thermodynamics. Does this mean that organisms violate the Second Law of Thermodynamics
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
suppose the radius of the ball is very small compared to other length scales in the problem. Take starting level as step 0, the next step down as step 1, and so on.
A small, 300 cart is moving at 1.90 on an air track when it collides with a larger, 1.00 cart at rest. After the collision, the small cart recoils at 0.890. Evaluate the speed of the large cart after the collision?
A ray of light is incident oa an angle of 60 degree on once face of a rectangular glass slab of thickness 0.1m and refractive index 1.5. Calculate the lateral shift produced
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