1. What is the difference between “resistance” and “resistivity”?

2. What is the rated resistance of a resistor coded with the color bands: Brown-Gray-White? (Google resistor color codes)

3. Voltmeters measure electric potential; ammeters measure electric current. Which of these two types of measuring device is likely to have an extremely high internal resistance? Which is likely to have a very low internal resistance? Explain your answers.

4. Suppose you have two light bulbs, A and B, which are identical in their construction except that the wire filament in bulb B is twice as thick as the wire filament in bulb A. If you apply the same voltage to the two bulbs, which glows brighter? Assuming the same operating efficiency for the two bulbs, how much brighter?

What is the KV in hand x-ray and why?

Needs the Kilovoltage and why (radiographic factor)

The Compton Effect. X-rays of wavelength ? = 61.0 pm are scattered from a thin foil of boron. What is the wavelength of the Compton scattered photons detected at the following angles (relative to the incident beam)? (Your answer should use three significant figures.)

(a) 15

1) find the vector sum of the three vectors A=0.98N (2cm) at 30˚, B=1.96N (4cm) at 90˚, C=2.94 (6cm) at 225˚. Record the results in graphical (head to tail) and analytical methods.

2) Add the following four displacement vectors using the analytic method. report the x and y components of the resultant, the magnitude of the resultant, and the direction of the resultant. show all work.

A= 5.0 m at 35˚

B= 7.0 m at 90˚

C= 3.0 m at 225˚

D= 2.4 m at 347˚

3)What possible sources of error can you identify for the graphical method of vector addition?

4) What possible sources of error can you identify for the analytical method of vector addition?

5) what possible sources of error can you identify for the experimental method of vector addition?

6) of the graphical and analytical methods, which one do you consider to be more accurate? Why?

7) Why is it not possible to experimently determine the esultant vector directly from the force table?

Can a single force applied to a body change both its translational and rotational motion? Explain and provide two different examples.

3) (a) Consider what happens when you push both a pin and the blunt end of a pen against your akin with the same force. Decide what determines whether your skin is cut

Derive, from the concept of the total energy of a system, the total energy of an oscillating system in terms of k and amplitude. (show all steps begging to end on how you get the equation and answer)

The Space Shuttle travels at a speed of about 7.8 ✕ 10³ m/s. The blink of an astronaut's eye lasts about 120 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?

_____Football Fields

Two sound waves (call them X and Y) travel through the air. Wave X has a wavelength of 0.1 m and a pressure amplitude of 0.04 Pa. Wave Y has a frequency of 3430 Hz and a pressure amplitude of 4 Pa.

Fill in the following:

The intensity of Y is greater than  that of X by ............... times.

Soundwave Y is ................. dB louder than soundwave X.

A box is allowed to slide a distance d down a ramp a constant speed while being pushed by a horizontal force, Fa. The mass of the box is m. The ramp is inclined at an angle of above the horizontal. If the coecient of kinetic friction between the box and the ramp is k, how much work is done by the horizontal force as the box moves a distance d down the ramp? Your answer should only contain the parameters m, d, , k, and the physical constant g.

An EM wave traveling through a vacuum has a frequency of 7.97×1014 Hz. Determine the WAVELENGTH of the wave. Remember, the speed of light is 3×108 m/s. ANS:_________m/wave

Two point charges are fixed on the y axis: a negative point charge q1 = -27 µC at y1 = +0.20 m and a positive point charge q2 at y2 = +0.30 m. A third point charge q = +8.0 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 19 N and points in the +y direction. Determine the magnitude of q2.

I have to write a lab report on "Measuring the value of g". For the theory section, I have to predict my theoretical value for "g " and its uncertainty. Explain how did I arrive to those numbers (do not quote someone else's value for "g").

Does anyone have an idea of how can I do this? Thanks a lot.

On a frictionless surface, a block of mass m1 and velocity v1 = vi is moving to the right when it collides with a spring, of spring constant k, attached to the left side of a stationary block of mass m2. Both blocks are free to slide on the surface.

(a) Argue either from physical principles or with equations that the velocities of the two blocks are the same when the spring is at its maximum compression.

(b) What is the maximum compression of the spring, xmax?
(c) In terms of m1,m2, and v, what are the final velocities of the two blocks after

they finish interacting?