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The final temperature of the oil and forging at thermal equilibrium is 45.8 °C. Assuming that heat flows only between the forging and the oil, determine the initial temperature in degrees Celsiu
How much work must be done by the brakes to bring the bike and rider to a stop? How far does the bicycle travel if it takes 4.5 s to come to rest? What is the magnitude of the braking force?
If one of the bulbs is removed in circuit II, how will the brightness of the other bulb be affected? Does it matter which bulb is removed?
The mass of a roller-coaster car, including its passengers, is 512 kg. Its speed at the bottom of the track in the figure below is 18 m/s. The radius of this section of the track is r1 = 26 m. Find
A uniform magnetic field of 0.50 T is directed along the positive x axis. A proton moving with a speed of 60 km/s enters this field. The helical path followed by the proton shown has a pitch of 5.0
However, after the crate is in motion, a horizontal force of 57 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.
Calculate the well depth of the xenon atom potential, assuming that A it is approximated by a spherical well with this radius. Does this sound reasonable to you?
Place the large jar (lid off, open end up) on the polarizer and rotate the analyzer while looking through the polarizers and syrup.
A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg. When the rock is submerged in water, the scale reads 4.10 kg. What is the density of the rock?
a 45000g brass sculpture gains 180480 J of thermal energy as its temperature increases from 28 degrees celsius to 40 degrees celsius. What is the approximate specific heat of brass?
A vertical scale on a spring balance reads from 0 to 170 . The scale has a length of 12.0 from the 0 to 170 reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency
An object placed on an equal-arm balance scale requires 12 kg to balance it. When ths object is placed on a spring scale, the spring scale reads 12 kg. What would be the readings of this object of t
Solar cells made of simple silicon convert bright light into electricity with NO moving parts.. What are amps, watts, volts and ohms?
If the coefficient of kinetic friction between the snow and skis is 0.11. what horsepower engine is required if 30 such skiers are on the rope at one time?
A power line carries a current of 97 A west along the tops of 9.0 m-high poles. What is the direction and the magnitude of the magnetic field produced at the ground?
(a) What is the kinetic energy of a beam of electrons with a de Broglie wavelength of 5.0 nm? (b) Through what potential difference should the electrons be accelerated to have this wavelength?
A camel sets out to cross the desert, which is 21.9 km wide in the north-south direction. The camel walks at the unifrom speed 3.51 km/hr along a straight line in the direction 49.6° north of Ea
RC =142 mm, RE =142 mm.The motor frequency is 25 Hz, and Allowed =74.5 MPa. What is the maximum power of the motor?
A mass M of 1.19 kg is attached to the end of a string whose length is 0.650 m. The mass slides without friction on a horizontal surface as indicated in the diagram. If the string can withstand a ma
Where a, b, and c are positive constants such that, for t in seconds, Will be in radians. A) Calculate the angular acceleration of the wheel as a function of time.
When 50 ml of a liquid is heated hrough 20 degree centigrade, its apparent expansion was 0.5 ml. If the coefficient of linear expansion of the container is 9 x 1/1000000 per K , find the coefficient
210 g uniform rod pivoted at one end. The other end is attached to a horizontal spring. The spring is neither stretched nor compressed when the rod hangs straight down. The axle is at the top of th
You want to take a bath with the water temperature at 35.0°C. The water temperature is 38.0°C from the hot water tap and 11.0°C from the cold water tap. You fill the tub with a total of
The first known collision between space debris and a functioning satellite occurred in 1996: At an altitude of 750 km, a year-old French spy satellite was hit by a piece of an Ariane rocket that had
Compare two side-by-side springs, one linear and one non-linear. Adjust the magnitude of k3 so that the two masses start with the same initial force