Two stationary positive point charges, charge 1 of magnitude 3.85 nC and charge 2 of magnitude 1.65 nC , are separated by a distance of 48.0 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. Part A What is the speed vfinal of the electron when it is 10.0 cm from charge 1?

On planet Jerousek, which has almost no atmosphere, the acceration due to gravity is 10.5 m/s2m/s2.A projectile is launched from the top of a steep hill with an initial velocity of 30 m/s at an angle of 43º from the horizon. The projectile takes 14 s to hit the ground at the bottom of the hill. (Neglect air resistance)

Part A - How long does it take for the projectile to reach the ground?

Part B - What is the y-component of the projectile's initial velocity?

Part C - How tall is the hill?

Part D - How far horizontally from the base of the launch-point on the hill does the projectile land?

A mass of 0.30 kg on the end of a spring oscillates with a period of 0.45 s and an amplitude of 0.15 m . A) Find the velocity when it passes the equilibrium point. B) Find the total energy of the system. C) Find the spring constant. D) Find the maximum acceleration of the mass.

a) A(n) 85-g ice cube at 0°C is placed in 920 g of water at 20°C. What is the final temperature of the mixture?

b) A 103-g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 87°C. What is the final temperature of the water after the ice has melted?

c) An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 432-g sample of silver at an initial temperature of 89°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Calculate the mass of the aluminum cup.

Determine the position of the Fermi energy level as a function of the concentrations of dopant atoms added to the semiconductor.

A 0.55 kg basketball strikes a smooth floor at 4.0 m/s[20° below the horizontal] and rebounds at 4.0 m/s[20°above the horizontal].
a) Find the horizontal impulse acting on the ball.
b) Find the vertical impulse acting on the ball.

Newton’s 2nd Law experiment using an inclined plane Purpose This lab experiment is to verify Newton’s second law and in the process also obtain the coefficient of kinetic friction between a block and an incline. Theory Newton’s 2nd law states that the net external force on an object in a given direction is equal to the mass of the object multiplied by its acceleration, Fnet = ma, where m is the mass of the object and a is its acceleration. Applying Newton’s 2nd law to the two objects as shown in the figure below, we obtain: m1g – T = m1a (1) T – m2gSin – fk = m2a (2) where fk = kFn (3) and Fn = m2gCos (4) from (2),(3), and (4) T = m2a + m2gSin + km2gCos (5) From (5), and for  = 0, T = m2a + km2g (6) Following equation (5), a graph of T vs. a should give a straight line where the slope will be equal to m2, and the coefficient of kinetic friction may be obtained from the intercept, since the intercept will be equal to (m2gSin + km2gCos) Procedure Open the simulation at https://ophysics.com/f3.html a. Choose a constant value for mass m2. b. Choose a value for  c. Choose a coefficient of friction low enough for the masses to move, and keep this coefficient constant. Verifying the acceleration d. Choose a value for m1 e. Using the “run” and “pause” buttons, run and pause make a table of at least seven data sets of h (take the absolute value) and time. f. Make a graph of h vs. time, and an appropriate curve fit to obtain the acceleration from your graph. (Hint: x = vit + ½ at2) g. Compare the acceleration from your graph with that provided by the simulation. Verifying Newton’s 2nd Law h. Vary m1, and record the corresponding acceleration, a, and tension, T, for several (at least seven) values of m1. i. Create a table for T vs. a j. Make a graph of T vs. a k. Choose an appropriate curve fit to obtain m2 and k from your graph (Hint: Equation 5) l. Compare the m2 and k from your graph to the actual m2 and k m. Repeat steps g to k using  = 0 (Hint: equation 6) n. Compare the two k values obtained from j and k. (do a percent difference) Questions 1. If a constant nonzero force is applied to an object, what can you say about the velocity and acceleration of the object? 2. Why can we neglect forces such as those holding a body together when we apply Newton’s second law of motion? Sources: 1. CCSU Physics Lab Manual 2. Ophysics.com 3. OpenStax College Physics

a. mention and explain the characteristics of the laser beam that distinguishes it from general light
b. write a summary of the working principles of the laser according to the assignment about the laser you have made

A turntable is off and is not spinning. A 1.5 g ant is on the disc and is 18 cm away from the center. The turntable is turned on and 1.4 s later it has an angular speed of 33 rpm. Assume the angular acceleration is constant and determine the following quantities for the ant 0.7 s after the turntable has been turned on. Express all quantities using appropriate mks units.
α =
ω =
v =
a_tan =
a_rad =
a =
F_net =

A naval gun aboard a ship is mounted so as to fire at 30◦above the horizontal.Shells fired from this gun have a muzzle velocity of 0.35km/s. The ship makesa direct approach toward a bunker on a high clifftop 150m above sea-level.It is known that the approaches to the shore have been heavily mined andthat no ship can come closer than 5km.At what horizontal range from the bunker should the ship open fire so asto strike the bunker? (Neglect air resistance, the speed of the ship, and theheight of the gun itself above sea-level.)

Looking at a football match, which of the following describes an event CONSISTENT with the study of Classical Mechanics?

a) The ball gains speed by bouncing into a puddle after a player kicks.

(b) A ball leaves the player's foot without rotation and, after colliding with the crossbar, returns to the player's feet faster than at the start of the kick.

c) In a soccer game, there is no mechanical phenomenon related to the study of physics.

d) The fact that the boot is of large or small nails, of metal or plastic, making the player slip more or less on rainy days, concerns the study of universal gravitation.

e) The encounter between a player's boot and the ball at the time of the kick is an example of a partially elastic shock in which there is a transfer of energy and momentum. ”

Analyzing the alternatives of the above question, we can observe in item “a” a phrase widely used by narrators and sports commentators in their radio and TV broadcasts. This phrase contains one of the many conceptual distortions in physics presented in sports broadcasts. Research and present in the COLLABORATIVE CHALLENGE other phrases that exemplify the extremely distorted view of physics.

How could we justify the goalkeeper's difficulty catching a kick in a rainy soccer match? Review the examples presented by your colleagues and indicate the misconceptions in the sentences. What do you think is the convincing power that a statement of this size can inadvertently wield in the minds of sports aficionados?

How do exposure factors differ when comparing conventional analog to CR/DR?

Two objects are said to be in parallel when they both act on the system in the same way, e.g., two forces are in parallel if they have the same direction and are applied at the same point.

A light rod of length 34.6 cm is held aloft from the ceiling by two springs attached to its ends. The left spring has a stiffness of 23.4 kg/s² and equilibrium length of 23.2 cm and the right spring has a stiffness of 18.8 kg/s² and equilibrium length of 25.3 cm. A ring weighing 610 g is placed 25.4 cm from the left spring.

(a) How much does the left spring stretch?
.067 m
(b) How much does the right spring stretch?
.2334 m
Now, mathematically slide the ring to the point that levels the rod.

(c) At what distance from the left spring should you place the ring in order for the rod to be level?
.14147 m
(d) How far from the ceiling is the rod when it's level?
.383 m
Now consider modelling the two springs as if there were only one spring that held the ring aloft.

(e) What is the equilibrium length of the spring?

(f) How much does the spring stretch when the ring is placed on it?

(g) What is the stiffness of the spring?

need help on e-g

1. If a concave mirror has a focal length of 20 cm, at which object distance will an image larger than objects be formed on screen?

a.) 40 cm b.) 30 cm c.) none of the choices d.) 14 cm e.) 50 cm

2. An electron and proton are projected with the same velocity when a uniform magnetic field perpendicular to the velocity of the two charges is applied. The electron follows a circular path of radius 1 mm. What is the radius of the proton's path?

More than anything I need 5 - 7 of this homework. You have been asked by your supervisors at A&L Engineering to design a roller coaster for a new theme park. Because this design is in the initial stages, you have been asked to create a track for the ride. Your coaster should have at least two peaks and two valleys, and launch from an initial height of 75 meters. Each peak and valley should represent a vertical change of at least 20 meters. In your design, you should plan for a mass between 400 and 600 kilograms. Once you have designed the track, you have been asked to calculate the kinetic energy, potential energy, momentum, and work done by the cart at various points throughout the track. Unless otherwise stated, you can ignore the effects of friction. Following your calculations, you have been asked to describe the energy transfers detailed by these equations. Directions To complete this roller coaster design report, complete the following: Create a diagram of a roller coaster track containing at least two peaks and two valleys. As you complete your report, you may wish to design a more complicated coaster. However, it should still have two peaks and two valleys that meet the requirements below and that you are comfortable using in calculations and descriptions of energy and momentum. Your diagram should include the following information: An initial height of 75 meters At least two peaks and two valleys representing drops of over 20 meters A set mass for your roller coaster cart between 400 and 600 kilograms Calculate the kinetic energy, potential energy, and momentum of the cart at the initial drop for both peaks, and for both valleys. If your coaster has more than two peaks and two valleys, select which peaks and valleys you wish to use in your calculations and clearly mark them on your diagram. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart moves along the track. This should be a narrative description of the energy transfers that occur at the initial launching point, peaks, and valleys. In your descriptions, address the following: At each of the identified points, how was kinetic energy transferred to potential energy, and vice versa? What happens to the total energy of the cart as it moves along the track? Why? How is the principle of conservation of energy applied in this situation? In addition to your description of the motion of the cart on the track, you have been asked to model the motion of the cart as it comes to a stop at the end of the coaster. For these calculations, assume that the cart will inelastically collide with a cart of equal mass at rest on a flat surface. Calculate the momentum and kinetic energy of the cart before and after an inelastic collision. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as a cart inelastically collides with an object of equal mass at rest. This should be a narrative description of the energy transfers that occur as the cart inelastically collides with a cart of equal mass. In your descriptions, address the following: What was the kinetic energy of each cart before and after the collision? What happens to the total energy of the system, now including both carts, as a result of the inelastic collision? Describe how the principle of conservation of energy is applied in this situation. Following the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. There is then a frictional section of the track to slow the cart to a stop over 20 meters. Describe the amount of work due to friction and frictional force exerted to stop both carts over 20 meters. Calculate the work due to friction and frictional force. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart is brought to a stop. This should be a narrative description of the energy transfers—written to describe these concepts to a nontechnical audience—that occur as the cart is brought to a stop. In your descriptions, address the following: What is the kinetic energy of the cart system before and after it has been brought to a stop? What happens to the total energy of the system as a result of this change in motion? Describe how the principle of conservation of energy is applied in this situation.