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1. In your own words, explain the meaning of the following terms:
a. Traverse wavesb. Longitudinal wavesc. Standing wavesd. Shock waves
2. Police use Doppler radar to detect speeding cars. Explain how the Doppler effect is used in this application.
3. 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?
4. Why do soldiers break step in marching over a bridge?
5. Jet aircraft mechanics wearing ear protectors are able to converse with each other because the ear protectors block out the sound of the jet engine. What physics concept would account for this?
6. Suppose you call your dog with an average intensity level of 80 decibels (db). How much more sound energy would you have to put into each call to:
a. Increase to 90 db?b. Increase to 100 db?
If you have two vectors in the x/y plane X= -37.40 & y=48.71. What is the magnitute of the resulant vector and it's angle from the positive x axis
A simple magnifying glass can focus sunlight enough to heat up paper or dry grass and start a fire. what is the intensity of the image of the Sun
cylinder made of red brass (K = 130 W/m degrees C) supports a hot reservoir at a temperature of 64o Celsius. Find the rate of heat flow through the cylinder
How many 104 W lightbulbs can you use in a 102 V circuit without tripping a 17 A circuit breaker? (The bulbs are connected in parallel that means that the potential difference across each lightbulb is 102 V.)
Two protons are placed at a = 4.69 cm above and below the x axis at x = 0 as shown in the figure. An electron is placed along the x axis a distance b = 10.1 cm from the origin. find the magnitude of the electrostatic force on the electron
Negative charge -Q is distributed uniformly around a quarter-circle of radius a that lies in the first quadrant with the center of curvature at the origin. find the x components and y components of the net electric field at the origin for Q=20uc a..
A 7.50-µC particle moves through a region of space where an electric field of magnitude 1250 N/C points in the positive x direction, and a magnetic field of magnitude 1.02 T points in the positive z direction.
A uranium atom is ionized seven times, losing seven electrons inthe process. Its resulting mass is 3.90×10−25 kgand it is given a kinetic energy of 3000 eV. If it circles ina magnetic field at a radius of 4.00 m, what isthe strength of the magnetic f..
Given that the Bohr radius for the lowest energy in hydrogen is a,, = 0.5 A. derive an approximate numerical value on the basis of Newtonian mechanics for the radius of the smallest Bohr orbit about the uranium nucleus.
(a) Determine the distance of the final image relative to the converging lens. (b) What is the height of the final image (including the proper algebraic sign)?
A horizontal 790-N merry-go-round of radius 1.20 m is started from rest by a constant horizontal force of 45 N, Find the kinetic energy of the merry-go-round after 5.0 s
An uncharged nonconductive hollow sphere of radius16.0cm surrounds a17.0µC charge located at the origin of a cartesian coordinate system. A drill with a radius of 1.00 mm is aligned along thezaxis, and a hole is drilled in the sphere. Calculate th..
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