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1. A light spring of force constant k = 162 N/m rests vertically on the bottom of a large beaker of water (Figure a). A 5.32-kg block of wood (density = 650 kg/m3) is connected to the spring, and the block-spring system is allowed to come to static equilibrium (Figure b). What is the elongation ΔL of the spring in cm?
2. A helium-filled balloon, whose envelope has a mass of 0.29 kg, is tied to a 3.9-m long, 0.051-kg string. The balloon is spherical with a radius of 0.40 m. When released, it lifts a length h of the string and then remains in equilibrium, as in the figure below. Determine the value of h. Hint: Only that part of the string above the floor contributes to the load being supported by the balloon. (The density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3.)
A 76 kg sprinter starts a race with an acceleration of 5.8 m/s2, What is the magnitude of the net external force on him in N
You fly from Boston's Logan Airport, at sea level, to Denver, at an altitude of 1.6km. What is your gravitational potential energy at the plane's 13km cruising altitude
Rock 1 is thrown straight down from a tower. Rock 2 is thrown straight up from the same height at the same speed as rock 1. find which rock will have the greatest speed
A series RLC circuit consists of a 107 ohm resistor, a 15.0 mH inductor, and a 0.500 nF capacitor. What is the power supplied to the circuit if w =1/2wo
Minh pulls a 10-kg crate on a rough inclined ramp with a cable tension F, directed towards the top and parallel to the plane. The angle of inclination of the plane is 30 and the coefficients of static and kinetic friction between the block and the in..
Evaluate the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
A hollow cone (like a party hat) has vertex angle 2?, slant height L, and surface charge density ?. It spins around its symmetry axis with angular frequency ?. What is the magnetic field at the ti
Find out the moment of inertia of the wheel if the block rises to a height of = 7.70 cm before momentarily coming to rest.
A soap film (n= 1.33) is contained within a rectangular wire frame. The frame is held veritcally so that the film drains downward and forms a wedge with flat faces. What is the wedge angle of the film
How much current is in each resistor? I1, I2, I3, I4. How much power is delivered to each? P1, P2, P3, P4. Compare the sum of the individual powers with the power delivered to the equivalent resistance for the circuit.]
Normal 0 false false false EN-US X-NONE X-NONE Water flows in a pipe
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground
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