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A 7.5 kg object hangs at one end of a rope that is attached to a support on a railroad boxcar. When the car accelerates to the right, the rope makes an angle of 37? with the vertical The acceleratio
An air track has a block with a height h=12.0cm under one support. The other support is 3.50m away. What is the angle of inclination theta?
The coefficient of kinetic friction for a 25 bobsled on a track is 0.10. What force is required to push it down a 5.0 incline and achieve a speed of 64 at the end of 75?
A 0.450-kg ice puck, moving east with a speed of 3.00 mis, has a head-on collision with a 0.900-kg puck initially at rest. Assuming a perfectly elastic collision, what will be the speed and directi
A pilot, whose mass is 80.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 125 m/s and that the radius of the loop-the-loop is 0.557 km. What is the appa
a plane is flying southeast at 215 km/h. Suddenly there is a wind from the north at 75km/h. What is the plane's new velocity with respect to the ground in standard position.
A rifle is aimed horizontally at a target 53 m away. The bullet hits the target 2.5 m below the aim point. what is the time takes and the speed?
A thin circular disk of radius R rotates with angular speed w, about an axis through the centre of the disc and perpendicular to the plane of the disc. A uniform magnetic field B acts parallel to t
A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 10 rad/s over the next 4.0 seconds. Assume that the angular acceleration
A two-slit pattern is viewed on a screen 1.10 m from the slits. If the two fifth-order minima are 76.5 cm apart, what is the total width of the central bright fringe?
A 1.05 liter flask contains a certain quantity of ideal gas at 310 K. Then an equal number of molecules of the same gas is added to the flask, after which the absolute pressure is 1.35 times its or
A cubical box has six faces, each 20 cm × 20 cm. The flux through each face is (the sides are labeled like a die, sides 1 and 6 are opposite to each other, as are 2 and 5, and 3 and 4. Find th
A volume of nitrogen gas has a density of 1.22 kg/m3 and a pressure of 1.18 atm. Find the temperature of the gas and the rms speed of its molecules.
A typical nuclear fission power plant produces about 1.00 GW of electrical power. Assume that the plant has an overall efficiency of 35.0% and that each fission produces 200 MeV of thermal energy.
A tank having a volume of 0.100 m3 contains helium gas at 160 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.25 atm?
Recent research on cell cycle kinetics have shed considerable light on the mechanisms by which the cell progresses from one stage of the cell cycle to the next. Do a bit of library research on the
A powerful bolt of lightning can carry a current of 230 kA. If two such bolts strike simultaneously at a distance of 36 m from each other, what is the magnetic force per meter exerted by one bolt on
Determine the multitarget-single hit parameters D0, Dq, and n.
River Pascal with a volume flow rate of 5.23×105 L/s joins with River Archimedes, which carries 9.80×105 L/s, to form the Bernoulli River. The Bernoulli River is 138.5 m wide and 3.17 m
If the tosser must accelerate the bale from a dead start to V in 6feet how much force must be exerted? What value of angle would minimize this acceleration force?
An archer shoots an arrow horizontally at a target 14 m away. The arrow is aimed directly at the center of the target, but it hits 55cm lower. What was the initial speed of the arrow?
How does the brick's kinetic energy (K) just before striking the ground compare with the gravitational potential energy (U_{grav}) at the top of the building? Set y=0at the ground level.
A cowboy at a dude ranch ?lls a horse trough that is 1 m long, 74 cm wide, and 46 cm deep. He uses a 2.1 cm diameter hose from which water emerges at 2.7 m/s . How long does it take him to ?ll the
If it takes Ann 0.79 s to react and apply the brakes, how many meters will she have moved before she begins to slow down?
After falling from rest from a height of 27 m, a 0.53 kg ball rebounds upward, reaching a height of 17 m. If the contact between ball and ground lasted 1.6 ms, what average force was exerted on the