On planet #3, you fire a projectile horizontally from the edge of a vertical cliff 34.4 m above the ground, with an initial speed of 72.6 m/s. The projectile lands 63.5 m away from the base of the cliff. What is the value of g for planet #3?

A curve of radius 70 m is banked for a design speed of 100 km/h . If the coefficient of static friction is 0.33 (wet pavement), at what range of speeds can a car safely make the curve?

QUESTION 1

1. In the equation to determine the total magnification for a microscope, what does N stand for?

   	1.	The index of refraction of the eyepiece.
   	2.	The index of refraction of the objective.
   	3.	The average index of refraction of both lenses combined with diffraction.
   	4.	The number of lenses on the microscope.
   	5.	The distance the user can see an image with a relaxed eye.
   	6.	The next point of contact for the observer diffracted lens.

3 points   

QUESTION 2

1. You sometimes see a fringe of color around an image seen in a simple lens. This is caused by

   	1.	differential chronometry.
   	2.	diffractive chronometry.
   	3.	spherical aberration.
   	4.	chromatic aberration.
   	5.	differential aberration.

3 points   

QUESTION 4

1. You can correct nearsightedness by placing a _______ lens in front of the eye

   	1.	compact
   	2.	extended
   	3.	final
   	4.	initial
   	5.	converging
   	6.	diverging

3 points   

QUESTION 7

1. If the focal length of a person's eye is less than that distance from the lens to the retina, then

   we say that person is

   	1.	nearsighted
   	2.	farsighted
   	3.	hyperopic
   	4.	astigmatic

3 points   

QUESTION 8

1. We can use lenses to correct for a person nearsightedness by

   	1.	forming an image of distant objects between the person's eye and their far point
   	2.	forming an image of distant objects the focal point of the eye
   	3.	forming an image of distant objects between the object and their far point
   	4.	magnifying the image of all distant objects

3 points   

QUESTION 9

1. When the eye views a distant object, the ciliary muscles are ______ allowing

   the eye's lens to be more __________

   	1.	tense, curved
   	2.	relaxed, flat
   	3.	compact, narrow
   	4.	retracted, open

3 points   

QUESTION 10

1. The shortest distance at which the eye can focus sharply on an object is referred to

   as the

   	1.	near point.
   	2.	radius of curvature.
   	3.	focal length.
   	4.	ciliary distance.

There is a line of negative charge (-Q) along the y axis (from 0 to L). There is a line of positive charge (+Q) along the x-axis (from 0 to L).

A) Find the electric field at the point (L/2, L/2). Sketch the direction of the field at this point on a diagram of the situation.

B) Find the potential at the point (L/2, L/2).

High-altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate the energy absorbed from a climber's body under the following conditions. The specific heat of ice is 2100 J/kg⋅C∘, the latent heat of fusion is 333 kJ/kg, the specific heat of water is 4186 J/kg⋅C∘.

Part A: Calculate the energy absorbed from a climber's body if he eats 0.50 kg of -15∘C snow which his body warms to body temperature of 37∘C. Express your answer to two significant figures and include the appropriate units.

Part B: Calculate the energy absorbed from a climber's body if he melts 0.50 kg of -15∘C snow using a stove and drink the resulting 0.50 kg of water at 2∘C, which his body has to warm to 37∘C. Express your answer to two significant figures and include the appropriate units.

A simple insulator has a band gap of 4.0 eV, and the Fermi energy may be taken to reside in the middle of the gap. Estimate the probability of an electron at room temperature being in the conduction band.

Question B5

(a) A very hot 0.8 kg copper cylinder at temperature 365.84℃ is dropped into a 0.2 kg copper bowl contains 0.3 kg of water at 20℃. The final temperature of the system is 85℃. Given that specific heat of copper 386 J/kg·K and specific heat of water 4190 J/kg·K.

(i) Find the entropy change ∆S1 of the copper bowl and water.

(ii) Find the entropy change ∆S2 of the copper cylinder.

(iii) Find the net entropy change ∆Snet of the system. Is the process reversible or irreversible?

(b) What are the four processes of Carnot cycle?

A simple pendulum has a mass of 0.650 kg and a length of 7.00 m. It is displaced through an angle of 14.0° and then released. Using the analysis model of a particle in simple harmonic motion, calculate the following. (Give your answer to the thousandths place.)

(a) What is the maximum speed of the bob?


(b) What is the maximum angular acceleration of the bob? (rad/s²)

(c) What is the maximum restoring force of the bob?


(d) Solve parts (a)through (c) by using other analysis models. (Hint: you may need to use separate analysis models for each part.)

(e) Compare the answers.

A circuit consists of a large electromagnet that has an inductance of 52.0 H and a resistance of 8.00 ?, a dc 270 V power source, and an open switch - all connected in series.

A) How long after the switch is closed is the current equal to 10.5 A?

B) How long after the switch is closed is the current equal to 31.9 A?

Meteoroids, meteors, and meteorites are all related. Choose the correct time-ordered pairing.

What are the three types of meteorites?

What is the least common type of meteorite?

Which type of meteorite has the Widmanstatten pattern?

A car with mass 1309 kg is travelling north at a speed of 28.9 m/s. It collides at right angles with a truck (m=2733 kg) travelling east at 16.6 m/s and the two vehicles stick together after the collision. How much kinetic energy is lost during the collision?

• If a block of mass m at speed v collides inelastically with a block of mass M at rest, what is the final velocity of each block? What fraction of the initial energy is lost?

• Two identical circular hockey pucks of radius r traveling towards each other at the same speed v collide elastically. Their centers are separated by a vertical distance d, which is less than r. After the collision, with what angle relative to the initial path of the pucks will each one travel along?

• Explain the physics of Newton’s Cradle.