In the inside of a TV set an electron is accerlerated by a potential difference of 20 kV in an evacuated tube. It is then passed through an uniform magnetic field of 100 mT which deflects it to the desired position on the screen.

1) Draw a diagram showing the path of the electron as it passes from the electron source to the screen.

2) After passing through the accelerating potential, what is the kinetic energy of the electron in eV? In joules?

3) What is the speed of the electron just before it enters the magnetic deflecting field?

4) What will be the radius of curvature of its path in the field?

An artificial satellite is in a circular orbit d=470.0 km above the surface of a planet of radius  r=3.95×10^3 km. The period of revolution of the satellite around the planet is T=1.15 hours. What is the average density of the planet?

A mass weighing 12lb stretches a spring 10in.. The mass is attached to a viscous damper with damping constant 3lb*s/ft. The mass is pushed upward, contracting the spring a distance of 2in, and then set into motion with a downward velocity of 4in/s. Determine the position of the mass at any time . Use as 32ft/s^2the acceleration due to gravity. Pay close attention to the units.

A microscope is used to examine a sample of bacteria that are spread on glass. If the diameter of the objective is twice its focal length and the sample is near the focal point of the objective, determine the shortest distance between two bacteria that can be resolved under the microscope in the terms of the wavelength ? of the light source.
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A solid bowling ball with a radius of 10.9 cm and a mass of 7.3 kg rolls along a bowling alley at a linear speed of 2.6 m/s.  
What is its translational kinetic energy? What is its rotational kinetic energy

A quidditch match is going on between Hufflepuff and Ravenclaw. A Hufflepuff chaser is flying 10 degrees north of east at a speed of 5 m/s. A bludger is heading east at a speed of 10 m/s. The bludger has a mass of 10 kg, and the player plus broom has a total mass of 80 kg. If the chaser catches the bludger (i.e. they collide and stick together), at what angle north of east do they move? Give both the expression and the numerical answer. (If you are not familiar with Harry Potter and its wizard jargon, you can reframe the question with the Hufflepuff chaser (player) as a soccer player and the bludger as a soccer ball.).

Please every step of the expression

A bullet of mass 0.0016 kg moving at 499 m/s impacts a large fixed block of wood and travels 6.7 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet.

Answer in units of kN

A 4.1 kg bucket of water is raised from a well by a rope. The acceleration of gravity is 9.81 m/s^2 .
If the upward acceleration of the bucket is 2.1 m/s2 , find the force exerted by the rope on the bucket of water.
Answer in units of N

A) The potential energy (U) of an object of mass m at a distance R from the center of the earth can be expressed as, U= -GMm/R. Where is the reference location of potential energy and what is the value of potential energy at that reference location?

B) Write a math expression of total mechanical energy for an object of mass m and escape velocity Vesc at the earth's surface.

C) What is the total mechanical energy of an object of mass m when it reaches at infinity with zero velocity.

D) Derive an expression for escape velocity using your answer in part b and c and calculate it. Mass of earth is 6 * 10^24 kg, radius of the earth is 6.4 * 10^6 m and G= 6.67 * 10^-11 N.m^2/kg.

1. If a closed system loses 2200 J of heat (to the surrounding environment) and 800 J of work is done on the system then what was the change in the internal energy of the system.

2. An ideal gas (inside a cylinder fitted with a movable piston) is heated and slowly expands at constant pressure of 5 atm from 1.5 L to 5.5 L.  How much work is done by the gas in this process?

3. If 1,700 J of heat was added to the gas in problem 3, then how much did the internal energy of the system change?

4. What is the efficiency of an automobile engine that has a heat input of 60.0 kJ and a heat output of 25.0 kJ?

5. If the exhaust temperature of the engine in problem 5 is 250° C, then what is the intake temperature?    (The exhaust and intake temperatures are the low and high operating temperatures of the engine, T_L and T_H)

1. In an isobaric compression of an idea gas, a) the internal energy of the gas remains constant,    b) no heat flows into the gas, c) no work is done on the gas, d) work is done on the gas,        and/or e) work is done by the gas.

2. An ideal gas undergoes an isothermal expansion from one state to another.  In this process determine the following (using the sign conventions on page 413):
   • Q = 0, Q > 0 or Q < 0
   • W = 0, W > 0 or W < 0
   • ΔU = 0, ΔU > 0 or ΔU < 0

3. An ideal gas undergoes an isothermal process.  Which of the following are true (may be more than one):  a) No heat is added or removed from the gas, b) the internal energy of the gas does not change and/or c) the average kinetic energy of the molecules does not change.

4. An ideal gas undergoes an adiabatic expansion in which no heat flows into or out of the gas.  As a result determine which of the following properties of the gas increases (may be more than one): a) temperature, b) pressure and/or c) volume.  

5. Can you cool your kitchen by leaving your refrigerator door open?  Why or why not?

6. If 1500 J of heat is added to a system and the system does 1100 J of work, then what was the change in the internal energy of the system?   Assume the system is closed (i.e. a gas inside of a cylinder fitted with a movable piston).

Write the three Newton’s Laws of motion and give one example for each Law:

Newton’s First Law:

Newton’s second Law:

Newton’s Third Law:

b)What is the difference between elastic and inelastic Collison in terms of total momentum and total kinetic energy ?

1) For a concave mirror at what object distance does the associated image transition between upright and inverted?

2) As the object distance increases through the distance you answered in part one does the image transition from upright to inverted or from inverted to upright?

3) For object distances slightly less than the distance you answered in part one is the image location near or far from the mirror and is it in front of or behind the mirror?

4) For object distances slightly more than the distance you answered in part one is the image location near or far from the mirror and is it in front of or behind the mirror?

5) For distances near to the distance you answered in part one is the image reduced or enlarged and is it reduced or enlarged by a small or large amount?

6) Which type of lens exhibits a similar behavior, converging or diverging?

A.

What is an electrical transformer? Discuss basic principles of operation and applications of electrical transformers. Can you relate electromagnetic induction to the operation a transformer?

B.

Discuss similarities and differences between RL and RLC Circuits. How can one tell if an RLC circuit is underdamped or overdamped? What are some applications of RLC Circuits?