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At what speed does a clock move by respect to an observer that measures it to run at one-third the rate of an identical clock at rest by respect to the observer?
When a car's starter is in use, it draws a large current. The car'slights draw much less current. As a certain car is starting, thecurrent through the battery is 61.8 A and the potential difference across the battery terminals is8.91 V.
Imagine that we add 250 J of thermal energy to 1 liter (L)(1000cm^3) of air initially at room temperature and normal pressure. By how much does its pressure increase
during liftoff a hot-air balloon accelerates upward at a rate of 3.3 . the balloonist drops an object over the side of
A spherical balloon is made from a material whose mass is 2.57 kg. The thickness of the material is negligible compared to the 1.22-m radius of the balloon. Find the absolute pressure of the helium gas
A train travels due south at 60 m/s. It reverses its direction and travels due north at 60 m/s. What is the change in velocity of the train
An equilateral triangle 10 m on a side has a 17 kg spheres whose enters are at each corner of the triangle. A spherical mass each has a radius of 0.5 m. if balls are released from rest, what speed will they have when they collide at the center of the..
a projectile is shot from the edge of a cliff 165 m above ground level with an initial speed of vo105 ms at an angle of
A skier (m=55.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 6.90 m and D = 10.4 m, determine H.
A 94 g piece of ice at 0.0°C is placed in an insulated calorimeter of negligible heat capacity containing 100 g of water at 100°C, What is the final temperature of the water once thermal equilibrium is established
To keep a room at a comfortable 16.0?C , a Carnot heat pump does 310J of work and supplies it with 3840J of heat. How much heat is removed from the outside air by the heat pump
A spring of force constant k=2.5*10^2 N/m is suspended form a rigid support. An object o mass 1.00 kg is attached to the uns How far below the starting point is equilibrium position for the object.
a shotputter throws the shot with an initial speed of 15.0ms at a 45.0 angle to the horizontal. calculate the
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