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Two balls attached to strings have the same mass and volume, but are made of different materials. Which ball excerts a geater net force on the block
The 210 A current through a spark plug moves 0.270 mC of charge. How long does the spark last
A 150kg uniform board 8m long is supported by two posts: one 1m from the left and the other 2m from the right. Find the forces on the supports
Gven the relationship between angular frequency and wave number derived from some wave equation, determine whether the system is dispersive or nondispersive
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C, determine the final temperature of the system consisting of the ic
A fire hose must be able to shoot a stream of water a specified height, straight up. Calculate the gauge pressure (difference between actual pressure
A proton is at the origin and an electron is at the point x = 0.42 nm, y = 0.39 nm. Find the electric force on the proton
A viewing window in the Atlanta aquarium is 55 inches wide and 46 inches high. what is the outward force on the window
A surface encloses the charges q1=3.4uC , q2=7.0uC, and q3=-3.8uC. Find the electric flux through this surface
The length of the ice block is L1 = 0.00484 m and its temperature is T1 = -11.0 °C. The aluminum block is L2 = 0.00139 m long, Calculate the heat per second per square meter
Two tugboats pull a disabled supertanker. Each tug exerts a constant forace of 1.55*10^6n, What is the toal work they do on the supertanker
You have invented a new game and are playing it with your friends. You have a projectile launcher that fires a brick (mass=2 kg) with a speed and angle that you can adjust. What is the work done by
High-speed stroboscopic photographs show that the head of a 184 g golf club is traveling at 35.2 m/s just before it strikes a 45.9g golf ball at rest on a tee
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 factory worker moves a 23.0kg crate a distance of 4.90m along a level floor at constant velocity by pushing horizontally on it. What magnitude of force must the worker apply
the period of rotation of the moon is about 27 days, 8 hours. The mass of the moon is 7.35x10^22 kg, Find the radius of the satellites orbit
A flywheel turns through 26 rev as it slows from an angular speed of 1.3 rad/s to a stop. What is its angular acceleration
A 60.0 cm long organ pipe is filled with air and is open at both ends. What is the wavelength of the fundamental frequency
A small rubber wheel on the shaft of a bicycle generator presses against the bike tire, What is the peak emf produced by the generator at the end of 4.64 s
If a bungee cord is stretched horizontally to a length of 2.2m , the tension in the cord is 2.3n. What is the tension in the 3.8-m-long cord
An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section is 5.00 m/s. What is the pressure in the narrow section of the pipe
A 30.0-kg object has a drag force with a magnitude proportional to the square of its speed. What is its terminal velocity
A 2 kg mass dropped 2.0 m above a spring with a spring constant of 40.0 N/m. How much does the spring compress
A research submarine has a 10-cm-diameter window that is 8.7cm thick. What is the submarine's maximum safe depth in salt water