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Unknown specific heat determined by calorimetry. An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. It is then quickly placed in 0.400 kg of water at 10.0°C, which is contained in a 0.200-kg aluminum calorimeter cup. The final temperature of the system is 30.5°C. Calculate the specific heat of the alloy.
a) Calculate the wavelength of the laser. b) Find the distance between the first dark line and the center bright line. c) Find the intensity of the light 30 mm above the central bright line
An athlete swings a 4.50-kg ball horizontally on the end of a rope. The ball moves in a circle of radius 1.000 m at an angular speed of 0.540 rev/s. What is the tangential speed of the ball
A ski jumper leaves the ski track moving in the horizontal direction with a speed of 25.0 m/ s. Obtain the velocity when the jumper lands
What forces act on a person walking on a level roadway? If that person walks on a level belt of a treadmill, what forces act on that person? Which activity takes more effort?
A person's face is 30cm ini front of a concave shaving mirror. If the image is an erect image 1.5 times as large as the object, what is the mirror's focal length?
During a hard sneeze, your eyes might shut for 0.38 s. If you are driving a car at 96 km/h during such a sneeze, how far does the car move during that time?
A flight controller determines that an airplane is 32 mi south of him. Half an hour later, the same plane is 48 mi northwest of him. termine the magnitude of its velocity during this time
In physics we were told that gravity pulls up down and that a chair for instance pulls up and that the forces balance each other out buy how can a chair have a force i find this a little confusing. Can any1 help?
A thin glass rod is submerged in oil. What is the critical angle for light traveling inside the rod? what is the refractive index of oil and glass
two identical hollow cylindrical neodymium iron boron ndfeb magnets are placed on a nonmagnetic post so that one is
The hot-reservoir temperature of a Carnot engine with 27.0% efficiency is 90.0 degrees C higher than the cold-reservoir temperature. What is the cold-reservoir temperatures
A 10 kg runaway grocery cart runs into a spring with spring constant 240N/m and compresses it by 65cm. What was the speed of the cart just before it hit the spring.
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