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To measure the wavelength of sodium light using Michaelson's interferometer
A balloon has a volume of 25.0L on a day when the temperature is 30.0 °C. If the temperature at night falls to 10.0 °C, what will be the volume of the balloon if the pressure remains constant?
Hilda Spellman was baking a pie for Sabrina’s 16th birthday, when the dough won’t roll flat on the kitchen table. She hit the 20 cm dough flat using a spatula moving at a velocity of 30 m/s downward, until the dough is 5 mm thick. The dough remained immobile throughout the process.
- If the spring constant of the dough is equal to 50, what is the momentum of the dough?
- What kind of collision is observed in the scenario?
How much energy in KWH is consumed by 600 watt bulb running for 20 hours
A mass of 0.750 kg is hung from a vertical spring with a spring constant of 20 N/m. After coming to equilibrium the mass is then pulled down an additional distance 10 cm and then released from rest. The mass then oscillates from position 3 to 4 to 5 to 4 and back to 3 over and over.
A) List the types of nonzero energy that the system has at xmin (Position 5). B) Calculate xeq.
C) Calculate hmax.
D) Calculate the total energy of the system at xmax (Position 3).
E) Calculate the maximum speed.
F) Calculate the amounts of EK, Eg, and ES when the mass is 4.00 cm above the equilibrium position.
G) Explain two ways that the maximum speed can be decreased
Some workers re-roofing a building are using a slide to get material from the roof to a bin beside the building.
Assume that the slide is frictionless and that the material being slid down starts at the top of the slide at rest.
If the bin is 4.4 m vertically below the top of the slide then at what speed will the material enter the bin? (in m s−1 to 2 s.f)
(a) Find the net electrostatic force at sphere B. (b) Find the net electric field at (4,-3)
A crane is used to lift some building materials which weigh 112 kg from the ground to the top of a building.
If the building materials are being raised by an electrical winch at a speed of 2.13 m s−1 then at what rate is the winch using electrical power? (in W to 3 s.f)
note: use g = 9.81 m s−2.
xygen ( molecular weight 32) is compressed reversibly and polytropically in a
cylinder from 1.05 bar, 15oC to 4.2bar in such a way that one- third of the work input
is rejected as heat to the cylinder walls . calculate the final temperature of the oxygen.
Assume oxygen to be aperfect gas and take Cv = 0.649kJ/kg.K
A long straight wire carries a current of 1.0 A.
(a) At what distance from the wire is the magnitude of the magnetic field
equal to 2.5 x 10^-5 T?
(b)What is the magnitude of the magnetic force that this wire will exert on a
3.0 nC particle moving at 4.2 x 10^4 m/s perpendicular to the field at that
distance?
