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A cord of length 1.3 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. (a) What is the frequency of the fundamental oscillation? Hz (b) What tension is required if the n = 3 mode has a frequency of 0.60 kHz? N
A 4.00-kg block rests between the floor and a 3.00-kg block as shown in the figure. the 3.00-kg block is tied to a wall by a horizontal rope. how many forces would we draw acting on the block
A rapidly spinning paddle wheel raises the temperature of 600mL of water from 21C to 25C. How much work is done in this process
Two spheres with uniform surface charge denisty, first with radius 7.4 cm and the other witrh radius 5.0cm, What is the surface charge density on each sphere
A helium weather balloon is used to lift a meteorological sensor package high up into the atmosphere. Calculate the number of moles of helium in the balloon
A car starts from rest and travels for 4.7 s with a uniform acceleration of +1.9 m/s2. The driver then applies the brakes, How far has the car gone from its start
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell.
An ideal refrigerator does 160 J of work to remove 570 J of heat from its cold compartment during each cycle. What is the refrigerator's coefficient of performance
A 3-kg block is suspended by a spring and is at rest on the floor. The spring has a spring constant k equal to 360 kg/s2. what is the unstretched length of the spring
water is flowing in a horizontal pipe of variable cross section. Where the cross-sectional area is 1.80x10^-2 m^2, What is the PRESSURE and VELOCITY
A spaceship moves with a speed v = 0.86c relative to a space platform that has a landing strip 4500 m long. What is the apparent length of the landing strip
What is the speed of the block of clay right after the collision. What impulse does the clay exert on the block.
For exercise, a 60 kg athlete runs up a 10-m high hill in 30 seconds. Assume the efficiency of the human body is 25%. Determine her metabolic power
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