Physics Waves And Oscillations Level: Misc Level
A 180 cm long string resonates in three segments when it it vibrated at a frequency of 40 Hz. What is the wavelength and speed of the wave?
Physics Waves And Oscillations Level: Misc Level
Jet aircraft mechanics wearing ear protectors are able to converse with each other becasue the ear protectors block out the sound of the jet engine. What physics concept would account for this?
Physics Waves And Oscillations Level: Misc Level
Why do soldiers break step in marching over a bridge?
Physics Waves And Oscillations Level: Misc Level
A person in a cave emits a sound and receives and echo 2.5 seconds later.How far is that person away from the wall?
Physics Waves And Oscillations Level: Misc Level
Police use Doppler radar to detect speeding cars. Explain how the Doppler effect is used in this application.
Physics Waves And Oscillations Level: Misc Level
A car horn is sounding at 400 Hz as it drives down a straight road at a speed of 20 m/s. What frequency does a hitchhiker hear as the car approaches him ?Recedes from him ?Assume v of sound to be 340 m/ s.
Physics Waves And Oscillations Level: Misc Level
In a certain factory the sound level is read to be 83 d B. Find the sound intensity in watts per square meter.
Physics Waves And Oscillations Level: Misc Level
Using the fact that the speed of sound in water is 1500 m/s, find the bulk modulus of water.
Physics Waves And Oscillations Level: Misc Level
An organ pipe resonates to a sound of frequency 264.0 Hz at 20 degrees C.If the pipe is used on a cold day when the air temperature in it is 12 degrees C, what will be its resonance frequency ?
Physics Electrostatics Level: Misc Level
How much energy is stored by the electric field between two square plates 8.0 cm on a side, separated by a 1.5 mm air gap, the charge on the plate are equal and opposite and of magnitude 420 u C.
Physics Ray Optics Level: Misc Level
a 7.7 -u F capacitor is charged by a 125 -V battery and is disconnect from the battery. when this capacitor (C 1 ) is then connected to a secong (initailly uncharged ) capacitor, c 2 the voltage on the first drops to 15 V. What is the value of c 2? (hin: Charge is conserve)
Physics Misc Topic Level: Misc Level
two identical + 9.5- uc point charges are initially spaced 3.5 cm from each other. it they are released at the same instant from rest, how fast will they be moving when they are very fast away from each other? assume they have identical masses of 1.0 mg
Physics Electrostatics Level: Misc Level
a point charge q create an electric potential of + 125 v at a distance of 15 cm. what is q ?
Physics Kinematics Level: Misc Level
A ski slope is 1.2 kilometers long and is inclined at 13 degrees from the horizontal. A person begins at the top of the slope (assumed to be smooth) and accelerates down wards. Find the time it takes for the person to travel the slope.
Physics Force & Laws Of Motion Level: Misc Level
A child is pushing a box of mass 6 kg up a smooth inclined plane which is at an angle 17 degrees to the horizontal. The box is pushed parallel to the plane, and its acceleration is 0.7 m/s 2.Find the force between the plane and the box.
