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A standing observer perceives a train whistle to have a frequency of 300 Hertz. If the train is moving towards the observer at a velocity of 25 meter per second, obtain the frequency of sound waves emitted from the train? Suppose the speed of sound is 300 m/s.
A pulsed laser emits light in a series of short pulses, each having duration of 24.6 ms. the wavelength of the light is 630 nm and the average power of each pulse is 4.83 mW,. Compute the energy of each pulse.
Sunlight strikes the surface of a lake. A diver sees the Sun at an angle of 26.8° with respect to the vertical
The scale of a spring balance that reads from 0 to 15.0 kg is 12.0 cm long. How much does the package weigh
q1. if the proton is released from rest in a uniform electric field does equivalent electric potential at the protons
A 1.50e-14 kg oil drop accelerates downwards at a rate of 1.80 m/s^2 when placed between two horizontal plates that are 9.40 cm apart. Determine the magnitude of the charge on the oil drop
An electron is fired into midpoint of a field between two charged plates. The initial velocity of the electron is 3.6 x 106 m/s The plates are a distance of 1.60 mmapart. The potential difference for the plates is120.0V.
Positive focal lengths correspond to _______.
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
A loop of diameter d = 12 cm, carrying a current I = 0.4 A is placed inside a magnetic field B = (0.2 T) i^+ (0.4 T) j^. What is the potential energy of the loop
An airplane is flying at 600 km/h at an altitude of 2.0km. how far away is she from being directly below the airplane
What angle does water surface make with the horizontal
a particular ideal solenoid has 1200 turnsm a radius of 10 cm and a current of 4.0 a. an electron is fired from the
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