Halley's comet, which passes around the Sun every 76 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823

Two stationary positive point charges, charge 1 of magnitude 3.85 nC and charge 2 of magnitude 2.00 nC , are separated by a distance of 43.0 cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

What is the speed V_final of the electron when it is 10.0 cm from charge 1?

Express your answer in meters per second.

Please show your work!

Two point charges are arranged so there is a small distance between them. One charge is positive and the other is negative. If the two charges have different magnitudes, there is a spot (not at infinity) where the total electric field is zero.

1) For the following hypothetical changes in astronomical bodies answer whether the change would make the specified property Larger, Smaller, or Not Changed.

If the radius of the Earth were larger, the force of gravity on objects on its surface would be .....
Larger Smaller Not Changed  

If the mass of the Sun were half as much and the Earth kept the same distance, the period of the Earth's orbit would be .....
Larger Smaller Not Changed  

If the mass of an object dropped on the surface of the Moon were increased, the acceleration of the object would be .....
Larger Smaller Not Changed

If the amount of ozone in the upper atmosphere of a planet is increased the amount of ultraviolet light reaching the surface will be ....
Larger Smaller Not Changed  

If the mass of Mars were greater, the acceleration due to gravity on its surface would be .....
Larger Smaller Not Changed  

If the distance between two planets is increased, the force of gravity is .....

2)

Classify the following statements as True or False based on the Nebular Theory for Solar System formation.
True /False  Rocky, metallic materials as well as volatile materials (He and H compounds) collected into planets near the Sun where the cloud is hot.
True/ False  Material for the planets was left over from the formation of the Sun.
True /False  Most of the thermal energy which started fusion reactions in the Sun originated as thermal energy in the large, hot dark nebula.

A piston contains 600 moles of an ideal monatomic gas that initally has a pressure of 2.44 × 105 Pa and a volume of 1.8 m3. The piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir. The pressure of the gas is increased to 5.44 × 105 Pa while maintaining a constant volume. The volume of the gas is increased to 8.8 m3 while maintaining a constant pressure. The pressure of the gas is decreased to 2.44 × 105 Pa while maintaining a constant volume. The volume of the gas is decreased to 1.8 m3 while maintaining a constant pressure. It may help you to recall that CV C V = 12.47 J/K/mole and CP C P = 20.79 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022 × 1023) times the number of moles of the gas. 1) How much energy is transferred into the gas from the hot reservoir? J 2) How much energy is transferred out of the gas into the cold reservoir? J 3) How much work is done by the gas? J 4) What is the efficiency of this cycle?

An outer wall is covered by insulating material in order to reduce heat loss. Across which layer (bricks or insulation) is the temperature drop is the largest?

7. A 1100-kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m.

(a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (Remember to specify the direction.)

(b) If the road goes down a hill at a 4� angle with respect to the horizontal, what is the constant force applied to the car to bring it to rest?

(c) What is the source of the force that brings the car to rest? (In other words, what is exerting the force on the car?) Explain your answer clearly.

Briefly describe the interior structure of Jupiter and explain why it is layered in this way. How do the interiors of the other jovian planets compare to that of Jupiter?

What is the average mass of a person?

70kg

What is the average mass of a commercial plane?

300,000kg

What is the mass of an electron?

9.109 x 10^-31 kg

What is the wavelength of a person moving at 10 m/s?

????

What is the wavelength of a commercial plane moving at 200 m/s?

????

What is the wavelength of a electron moving at 1% of the speed of light?

????

Why don't we see the quantum properties of the commercial plane and person?

????

I am writing a paper on superfluidity for my physics class and was wondering if anyone could give me some ideas of what to write on and how to write a scientific style paper. If you have any sources that could help that would be great.

1) An object's original position is 30 meters at an angle of 150 degrees and final position is 30 meters at 70 degrees. The object traveling at constant speed in a circular arc clockwise and makes the journey in 12 seconds.

a) Find the Displacement vector

b) find the total Distance traveled.

c)find the avg Velocity vector, avg Speed, and instantaneous Speed.

d) find the avg Acceleration vector and instantaneous Acceleration vector. Show that the avg Acceleration vector points towards the center when placed at the midpoint of the arc!

The 1.3 kg physics book in figure is connected by a string to a 250 g coffee cup. The book is given a push up the slope and released with a speed of 3.5 m/s . The coefficients of friction are μs =0.50 and μk =0.20.

Part A) How far does the book slide?

An 84.0 kg spacewalking astronaut pushes off a 640 kg satellite, exerting a 95.0 N force for the 0.600 s it takes him to straighten his arms.

Part B) How far apart are the astronaut and the satellite after 1.00 min ?

What value resistor will discharge a 3.00 μF capacitor to 10.0% of its initial charge in 2.20 ms ?

A sphere of radius 20 cm and a mass of 3 kg rolls down an incline of 14.6o and 14 cm high. a. Calculate its translational and rotational kinetic energy when it reaches the bottom. b. What is the ratio of the translational kinetic energy to the rotational kinetic energy? c. What quantities does this ratio depend on?

A rocket is launched at an angle of 53.0° above the horizontal with an initial speed of 98 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile.

(a) Find the maximum altitude reached by the rocket.

m (b) Find its total time of flight.

s (c) Find its horizontal range. m