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A sign (mass 1700kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.013m^2, What is the stress within the girder
A fixed 0.15 kg solid-disk pulley with a radius of 0.060 m is acted on by a net torque of 5.4 m�·N. What is the angular acceleration of the pulley
A ball is launched from a cannon at the ground level with speed v0=40 m/s at an angle 36.9 degrees above the horizontal. Find the horizontal range
What is the rms speed in meters/second of nitrogen molecules contained in a volume of 4.0 m^3 at 2.4 atm, if the total amount of nitrogen is 1700 moles
a hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. estimate the length of the lake
A 40 kg child sits 1.3 m away from the center of a merry-go-round. If the merry-go-round is traveling with a radial velocity of .78 rad/s, what is the centripetal force on the child
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. calculate the final temperature of the puddle
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 13.5 W. What is HooRU\'s temperature
a piano turner hears one beat every 1.1 second when trying to adjust two strings, How far off in frequency is the other string
Does the level of social responsibility exhibited by Starbucks have any effect on how other coffee retailers are viewed?
a particular organ pipe can resonate at 240 hz, 400 hz, and 560 hz, What is the fundamental frequency of the pipe
Suppose a news report stated that starship Enterprise had just returned from a 5 year voyage while traveling at 0.81c. If the report meant 5.0 years of Earth time, how much time elapsed on the ship
A mover's dolly is used to deliver a refriger- ator up a ramp into a house. What gravitational potential energy is gained by the refrigerator
Suppose you decide to travel to a star 85 light-years away at a speed that tells you the distance is only 10 light-years
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature (almost half of atmospheric pressure). estimate the average time between collisions
Two small plastic spheres are given positive electrical charges. When they are 15 cm apart, the repulsive force between them has magnitude of 0.220N. what is the charge on each sphere
A blackbody is emitting radiation at a rate of 25 W at 27oC. what is the rate of emission
A plot of the temperature versus the energy per kg added to a piece of ice as it goes from below freezing at - 10°C to becoming steam at 110°C consists of straight lines, What
A cart of mass m = 1.4 kg is released from the top of a ramp sloped ? = 13° relative to the horizontal. The length of the ramp is L =9.6 m. find the car's Kinetic Energy at the bottom of the ramp
A 55.3-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
Two forces are acting on a 9.5 kg box on a frictionless surface. Force A has a magnitude of 44 N, Find the magnitude of the acceleration of the box
In the "World's Strongest Man" competition, one event is to pull a 2370 kg truck for 5 m. What is the least amount of force
A Hall probe uses the Hall effect to measure the size of magnetic fields - it does this by measuring the potential difference across the electric field created by the displacement of charge
A car of mass M = 900kg traveling at 50.0km/hour enters a banked turn covered with ice. What is the radius r of the turn
An electric motor rotating a workshop grinding wheel at a rate of 9.20x101 rev/min is switched off. How long does it take for the grinding wheel to stop