Please respond no later than 9:00 am Saturday, June 16, 2018. Thank you.

Part 1

QUESTION How would the time of the jump and the horizontal distance traveled change if g were changed, for example if the jump could be repeated with the same initial velocity on a different planet? (Select all that apply.)  

Note: I answered b and c from one of your previous post, and got the answer wrong.

a. The time of the jump increases when g is smaller.

b. The displacement increases with increased time of the jump.

c. The time of the jump decreases when g is smaller.

d. Increasing the time of the jump has no effect on the displacement.

e. The displacement decreases with increased time of the jump.

Part 2

A bartender slides a beer mug at 1.2 m/s towards a customer at the end of a frictionless bar that is 1.3 m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar.

(a) How far away from the end of the bar does the mug hit the floor? 0.6181m (This is correct)

(b) What are the speed and direction of the mug at impact?

Speed____________m/s

Direction __________degree below the horizontal

How thick (minimum) should the air layer be between two flat glass surfaces if the glass is to appear bright when 510 nm light is incident normally?
nm
What if the glass is to appear dark?
nm

A magnifying glass is a single convex lens with a focal length of f = +9.50 cm. (Assume the person using the magnifying glass has a near point of 25 cm and the magnifying glass is directly in front of the person's eyes.)

(a) What is the angular magnification when this lens forms a (virtual) image at ???


How far from the object should the lens be held?


(b) What is the angular magnification when this lens forms a (virtual) image at the person's near point?


How far from the object should the lens be held in this case?

The figure is an overhead view of a thin uniform rod of length 0.467 m and mass M rotating horizontally at angular speed 15.7 rad/s about an axis through its center. A particle of mass M/3 initially attached to one end is ejected from the rod and travels along a path that is perpendicular to the rod at the instant of ejection. If the particle's speed v_p is 3.32 m/s greater than the speed of the rod end just after ejection, what is the value of v_p?

Two converging lenses, each of focal length 14.9 cm, are placed 39.3 cm apart, and an object is placed 30.0 cm in front of the first lens. Where is the final image formed?

The image is located
cm  ---Location--- behind the second lens. in front of the first lens. in front of the second lens.

What is the magnification of the system?
M =  ?

An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate (see the drawing). The plates are separated by a distance of 1.4 cm, and the electric field within the capacitor has a magnitude of 2.0 x 10^6 V/m. What is the kinetic energy of the electron just as it reaches the positive plate?

A satellite is in a circular orbit about the earth (ME = 5.98 X10^24 kg). The period of the satellite is 1.40X10^4 s. What is the speed at which the satellite travels?

A transverse harmonic wave travels on a rope according to the following expression: y(x,t) = 0.17sin(2.8x + 17.3t) The mass density of the rope is μ = 0.107 kg/m. x and y are measured in meters and t in seconds.

1)

What is the tension in the rope?

2)

At x = 3.5 m and t = 0.4 s, what is the velocity of the rope? (watch your sign)

3)

At x = 3.5 m and t = 0.4 s, what is the acceleration of the rope? (watch your sign)

4)

What is the average speed of the rope during one complete oscillation of the rope?

5)

In what direction is the wave traveling?

6)

On the same rope, how would increasing the wavelength of the wave change the period of oscillation?

Consider the situation where one IOLab device rolls into another stationary IOlab device and they stick together and they roll off together. When answering the following questions, answer them specifically for this situation.

How could you calculate the total momentum before the collision?      

How could you calculate the total momentum after the collision?      

How could you calculate the total kinetic energy before the collision?      

How could you calculate the total kinetic energy after the collision?      

(Extra information: the IOLab device can generate both Force/Time graphs and Velocity/ Time graphs)

A 58.0 kg bungee jumper is standing on a tall platform (ho = 46.0 m) as shown in the diagram. The bungee cord has an unstrained length of Lo = 9.00 m, and when stretched, behaves like an ideal spring with a spring constant of k = 61.0 N/m. The jumper falls from rest, and the only forces acting on him are gravity and, for the latter part of the descent, the elastic force of the bungee cord. What is his speed when he is at the following heights above the water? (a) hA = 37.0 m and (b) hB = 15.0 m? Ignore the mass of the bungee cord.

a photon beam is made from a target with a high impedance. electron beams of 6 and 16Mev are used in the process, shot at the target. the ratio of beam intensity is measured in the direction of the electron beam (0 degrees) and at 25 degrees from the angle of incidence.nFor what electron bean energy (and why) is the ratio of intensities (i₀/i₂₅) the largest?

Calculate the frequency of the photon emitted when the electron jumps from the n = 3 to the n = 2 energy level.

Modern International Maritime Organization (IMO) regulations specify that ships longer than 200 m must have a ship's whistle whose frequency is between 70 and 192 Hz. Suppose that a 235-m ship has a whistle whose frequency is 187 Hz. If the ship is stationary, what is the maximum speed that an approaching observer can have so that the ship's whistle still satisfies IMO regulations?

Two trains are traveling on the same track and in the same direction. The first train is moving at a speed of 37.2 m/s and blows its horn, whose frequency is 255 Hz. The second train, which is behind the first, detects a frequency of 238 Hz. What is the speed of the second train?

Two trains are traveling on the same track and in the same direction. The first train, which is behind the second train, blows a horn whose frequency is 265 Hz. The second train detects a frequency of 284 Hz. If the speed of the second train is 14.0 m/s, what is the speed of the first train?

READING 2 The eardrum is displaced surprisingly little when a sound wave strikes it. Some idea of the displacement of the eardrum by a sound wave can be obtained by using Equation 7.1: Equation for wave energy The displacement amplitude, A, of the air molecules gives us a lower limit to the displacement of the eardrum.

At the threshold of hearing at 3.4 kHz, the sound intensity is about 10−12W/m2. The threshold of pain begins at an intensity of 1.0W/m2 (19).

What is the amplitude of eardrum vibrations at these intensities?

The density of air is 1.3kg/m3. The speed of sound is 331m/s.

Please write your answers with one decimal places.

(________________10^−3 nm (at threshold of hearing) (This value is ~ 3/100 the diameter of a hydrogen atom!)

________________10^3 nm (at threshold of pain)

I believe the answer to the first question is 3.19 x to^-3 nm

Describe magnetic inductance and give examples.

Describe R-L, L-C, and L-R-C series circuits, and give examples.

( NOT by hand)