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A parallel beam of light from a He-Ne laser, with a wavelength of 662 nm, falls on two very narrow slits 0.050 mm apart. How far apart are the fringes in the center of the pattern if the screen is 2
What is the pendulum bob's speed when it passes through the lowest point of the swing?
A 60 kg man was bungee jumping and reached a speed of 30 m/s just before the cord began to stretch. Assume that the cord is a spring with K = 40 N/m, what is the maximum stretch in the cord.
At a rock concert, a dB meter registered 130 dB when placed 2.5 m in front of a loudspeaker on the stage. (a) What was the power output of the speaker, assuming uniform spherical spreading of the so
What is the minimum coefficient of friction required to maintain pure rolling motion for a disk down an inclined plane with an angle of 20.1 degrees?
A rectangular block of ice 12 m on each side and 1.3 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How many penguins of mass 26 kg each c
A 1.62 m wide, 1.38 m high, 1500 kg car hits a very slick patch of ice while going 20.0 m/s. Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed d
An object is 20.8 cm from the surface of a re?ective spherical Christmas-tree ornament 6.53 cm in diameter. What is the position of the image? What is the magni?cation of the image?
A piece of aluminum (specific heat 0.910 kJ/kg 0C) of mass 175 g at 74 0 C is dropped into a Styrofoam cup filled with 183 ml water at 20 0 C.
Calculate the work done by the friction force. What is the work done by the force of gravity?
A parallel-plate air-fllled capacitor having area 40 cm2 and plate spacing 1.0 mm is charged to a potential difference of 600 V. Find (u) the capacitance, (b) the magnitude of the charge on each pla
A 3.00 kg rocket is fired which aquires a speed of 50 m/s after traveling down a 90cm launching tube. Assuming it accelerated uniformly what force acted on it?
The influence of gravity on Mars. g on Mars may be taken as 4.0 m/s2. How long does it take in seconds for the free-falling metal object to reach the Martian surface?
Find the tension in the wire,Find the horizontal component of the force exerted on the rod by the hinge. Find the vertical component of the force exerted on the rod by the hinge.
A space station, in the form of a wheel 110 m in diameter, rotates to provide an artificial gravity. Find the rate of rotation of the wheel (in revolutions per minute) that produce effectwill this .
A bar 5.0 m long has its center of gravity 1.5 m from the heavy end. If it is placed on the edge of a block 1.5 m from the light end and a weight of 750 N is placed on the bar at the light end, it w
The drift velocity of free electrons in a copper wire is 7 mm/s, resistivity is 1.71 × 10-8 · m, and the free electron density is 8.43 × 1028 electrons/m3.
With what minimum speed must you toss a 190 g ball straight up to hit the 15.0 m-high roof of the gymnasium if you release the ball 1.20 m above the ground? Solve this problem using energy.
A 186 watt motor is used to lift a 114 kg container to a height of 6 m. How much time does it take to lift the container with the motor?
A 300 block on a 52.0 -long string swings in a circle on a horizontal, frictionless table at 60.0 . What is the speed of the block?
A rectangular container measuring 16 cm 42 cm 71 cm is filled with water. What is the mass of this volume of water in kilograms and grams?
A thin conducting wire of length 3w forms a planar equilateral triangle. A direct current I flows in the wire. Find the magnetic flux density at the center of the triangle.
The solar power per unit area reaching the Earth's surface is 235 W/m2, averaged over a 24 hour day. If you live in a house whose average power requirement is 3 kW and you can convert solar power t
If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 164 Hz? Answer in units of cm.
You determine that at sealevel and a temperature of 20 deg C, the speed of sound is 365 meters/sec. You know that the actual value is 344 meters/sec. How much is your percentage error?