Physics Waves And Oscillations Level: Misc Level
A wave generator produces 22.5 pulses in 5.50 s.
a. What is its . period?
b. What is its frequency?
Physics Waves And Oscillations Level: Misc Level
If sound travels at 5600 m/s through a steel rod, what is the wavelength, given a wave frequency of 2000 Hz?
Physics Waves And Oscillations Level: Misc Level
Write the letter of the choice that best completes the statement or answers the question. The time interval during which motion repeats is the--
[A] wave pulse [B] frequency [C] period [D] wavelength
Physics Heat & Thermodynamics Level: Misc Level
Answer the following question(s), showing your calculations. An 8.00x 102-g block of lead is heated in boiling water, 100.0%C, until the block, s temperature is the same as the water,s The lead is then removed from the boiling water and dropped into 2.50x 10 2 g of cool water at 12.2 % C. After a short time, the
a. How much heat is gained by the cool water?
b. On the basis of these measurements, what is the specific heat of lead?
Physics Heat & Thermodynamics Level: Misc Level
Answer the following question(s), showing your calculations. An 8.00x 102-g block of lead is heated in boiling water, 100.0%C, until the block, s temperature is the same as the water,s The lead is then removed from the boiling water and dropped into 2.50x 10 2 g of cool water at 12.2 % C. After a short time, the
a. How much heat is gained by the cool water?
b. On the basis of these measurements, what is the specific heat of lead?
Physics Heat & Thermodynamics Level: Misc Level
Given that ice has a heat of fusion of 3.34x 10 5. J/kg, how much heat must be added to 2.3 kg of ice at 0.0 % C to liquid water at 0.0 %C?
Physics Heat & Thermodynamics Level: Misc Level
The specific heat of methanol is 2450 J/kg-K.Calculate the amount of heat that must be added to 0.21 kg of methanol to raise its temperature by 25% C.
Physics Units Level: Misc Level
Helium has the lowest boiling point of all elements. It boils at -269 % C. Express that temperature in kelvins.
Physics Heat & Thermodynamics Level: Misc Level
Entropy is the measure of a system,s
[A] disorder [B] temperature[C] thermal equilibrium [D] thermal energy
Physics Heat & Thermodynamics Level: Misc Level
The amount of heat needed to melt 1 kg of a substance is the --[A] heat of fusion [B] entropy [C] specific heat [D] heat of vaporization
Physics Ray Optics Level: Misc Level
Gayle runs at a speed of 4 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5 m, her brother, who is initially at rest, hopson her back and together they continue down the hill. what is their speed at the bottom of the hill if the vertical drop is 15 m?Gayle,s mass is 50 kg, the sled has a mass of 5 kg, and her brother has a mass of of 30 kg.
Physics Force & Laws Of Motion Level: Misc Level
Starting from rest, a 10 kg block slides 3 m down a frictionless ramp ( inclined at 30 % from the floor) to the bottom. The block then slides an additional 5 m along the floor before coming to a stop. Determine (a) the speed of the block at the bottom of the ramp, (b) the coefficient of kinetic friction between block and floor, and (c) the mechanical energy lost due to friction.
Physics Force & Laws Of Motion Level: Misc Level
A 2.00 kg block of wood moves up an inclined plane at a constant velocity. If the angle is 30 degrees and the coefficicient of kinetic friction between the block and the plane is 0.435. what is the magnitude of the frictional what is the value of the force (F) going upward to move the block at a constant velocity? If the block has moved 1. 50 m up the incline, what is the amount of work done in the process? what is the change in potential energy in the process?
Physics Work,Power & Energy Level: Misc Level
A 70 kg athlete climbs a rope in the gymnasium at a constant speed of 0.700 m/s.what is the average power (in watts ) developed in the process?If the athlete climbs 5 meters, what is the amount of work done? How much time does climb the 5 meters?
Physics Work,Power & Energy Level: Misc Level
A 20.0 gram ( better make it .0200 kg) bullet is fired horizontally at a slab of wood that is 3.00 cm (better make it 0.0300 m) thick. The bullet hed an initial velocity of 300 m/s. The bullet exits the other side of the wood with a velocity of 280 m/s. What is the change in kinetic energy of the bullet in this process? How much work is done on the bullet by the wood?what is the average acceleration of the bullet while traversing the slab of wood? what is the average force of thewood on the bullet?
