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A fire helicopter carries a 580 kg bucket of water at the end of a 20.0 m longcable. Flying back from a fire at a constant speed of 40.0 m/s, thecable makes an angle of 42.0° withrespect to the vertical.
Determine the force of air resistance on the bucket.
A 200-g mass resting on a horizontal frictionless surface is attached to a spring of spring constant 35 N/m. What is the angular frequency of the oscillations
At 20°C, a brass cube has an edge length of 35 cm. What is the increase in the cube's surface area when it is heated from 20°C to 81°C
A 1.5 m^3-volume tank holds oxygen gas (M = 32 g/mole) at the pressure of 500,000 Pa. The temperature is 27 C. Find the mass of oxygen in the tank (in kg)
A cheetah is traveling across the African countryside, initially moving at a constant velocity of 15 m/s. What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds
A 10.1-kg cannonball is fired from a 3,350 kg cannon with a velocity of 198 m/s. What is the speed of recoil of the cannon
A radio-controlled car increases its kinetic energy from 8 J to 10 J over a distance of 5 m. What was the average net force on the car during this interval
A 10 kg block of metal is massed on a spring scale in air. What is the desnity of the metal
Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
The coefficient of static friction between the wall and the rod is μs = 0.575. Determine the minimum distance x from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A.
Calculate the time the microgel would require to recover to 99% of its initial height after the stress is removed. Determine the potential barrier for the molecule aggregation?
How much energy is transferred to the water as heat
An ideal Voltmeter is connected across the terminals of a 12 Volt battery and a light bulb with R = 4.5 ohms is also connected across the battery terminals, Find the power generated by the Emf of the battery
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