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1) A burglar alarm is wailing with a frequency of 1200 Hz. What frequency does a cop hear who is driving towards the alarm at a speed of 40.0 m/s? ( Answer : 1336 HZ)
2) A car approaching a stationary observer emits 450 HZ from its horn. If the observer detects a frequency of 470 HZ., how fast is the car moving? speed of sound is 343 m/s (Answer : 15m/s )
3) A carnot engine operates between 20 and 500 degress celcius. How much energy must be supplied to produce 10000 J of work? (Answer 16000 J)
4) Calculate the change in entropy when a 156 gram of ice melts at 0 degrees celcius?
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
Dust particles are pulverized rock, which has density 2500 kg/m3. They are approximately spheres 20 ?m in diameter. what is the root-mean-square speed (thermal speed) of a dust particle at 60°C
The objective lens in a microscope with a 21.0 cm long tube has a magnification of -50.0 and the eyepiece has a magnification of 15.0. What is the focal length of the objective
Examine whether it is reasonable to ignore the effects of gravity for each particle. Evaluate the paths travelled by electron and proton and explain the differences.
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image
Find maximum height reached by the diver using the equation of motion.
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
A current of 7.35 A in a solenoid of length 12.2 cm creates a 0.397-T magnetic field, How many turns does this solenoid contain
a rifle with a mass of 1.2kg fires a bullet with a mass of 6.0g (0.006kg). What is the momentum of the bullet after the rifle is fired
A 61kg skydiver can be modeled as a rectangular "box" with dimensions 21cm x 37cm x 1.8m. What is his terminal speed if he falls feet first
Two objects of masses m and 3.00 m are moving towards each other along the x-axis with the same initial speed of v. The object with mass m is travelling to the left.
Three point charges, -6.05 10-9 C, -9.40 10-9 C, and +7.25 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
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