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A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.0 kg m2. What is the resulting angular speed of the student and the st
A spring is compressed by 0.0527 m and is used to launch an object horizontally with a speed of 2.19 m/s. at what angular frequency (in rad/s) would it oscillate
An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.70 multiply.gif 10-28 kg, what is the speed of the heavier fragment
Consider a fish of average size swimming near the bottom of a lake of depth 46 m. What is the water pressure next to the fish
A piece of radium has an activity of 10 mCi. What is the mass of the radium
A sound wave with intensity 4 mW/m2 interferes destructively with a sound wave that has an intensity of 13 mW/m2
when viewing an object with a magnifying glass whose focal length is 10 cm, What is the observed magnification
A downward force of 60 N is exerted on the top of the book by a hand pushing down on the book. What is the gravitational force acting on the book
An empty storage tank has a volume of 144 ft3. What is the buoyant force exerted on it by the air
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
Use Pascal's principle. Given that Fout is 68 lb., the areas of the output and input cylinders are Aout 21 in2 and Ain 6 in2, what is the input force
Radio telescopes use radio waves (instead of light) to produce images. what is the best possible angular resolution that can be achieved
A 8.5 omegacap.gif resistor and a 5.9 omegacap.gif resistor are connected in series with a battery. Find the potential difference across the battery
A juniper wood plank measuring 5 ft by 0.6 ft by 0.3 ft is totally immersed in water. What is the net force acting on the plank
A 18.2 omegacap.gif resistor, 8.7 omegacap.gif resistor, and a 4.3 omegacap.gif resistor are connected in parallel to a 12 V battery. Determine the current delivered by the battery
An object is recovered from under the sea. Its weight is measured to be 54.6 lb and its volume 1.3 ft3. What is the object's weight density
The length of a simple pendulum is 0.65 m and the mass of the particle (the "bob") at the end of the cable is 0.26 kg. What is the angular frequency of the motion
A 95.0-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
A viewing window in the Atlanta aquarium is 50 inches wide and 50 inches high. what is the outward force on the window
A therapist examines the range of motion of an athlete's knee joint. What was the angular displacement of the lower leg from full extension to full flexion
A weightlifter lifts 200 kg from the floor to a height of 2 m in 2 s. How much work did the weightlifter perform
A person wants to push an 80-kg box across the floor. The coefficient of friction between the box and the floor is 0.5. What is the normal force experienced by the box as it sits on the floor
just when charliw wants to sit down, a 240 lb bully pushes him away with a force of 450 N. what is the force exerted by charlie brown on the bully
A cylindrical rod with a diameter of 2.54 cm and a length of 76.2 cm is initially at a temperature of 20.0 C. Next, After reaching equilibrium, what is the volume of the rod
bowler uses a 5-kg bowling ball. What is the weight of the bowling ball, What is the momentum of the ball