A hockey puck slides on the ice with an initial velocity of vi1 = 5 m/s in the positive x direction. A second hockey puck is sliding to the left with an initial velocity of vi2 = 3 m/s. The two pucks collide and after the collision puck 1 has a final velocity of vf1 = 3 m/s in the positive x direction at an angle of 30 degrees above the positive x axis. Is the collision elastic or inelastic?

Please show all work.

19.

How is the probability of something defined in terms of microstates and macrostates?

Quantum variation in macrostates

Numbers of alternate realities

Fraction of macrostates containing a microstate

Proportion of microstates that are in a macrostate 20. What was the first programmable machine? The Collosus at Bletchley Park Babbage's Analytical Machine Mauchly, Eckert, and von Neumann's ENIAC The Jacquard Loom 21. Phlogiston was proposed as an explanation for what phenomenon? Life Weather Transmutation Fire

An object is moving along a straight line, and the uncertainty in its position is 2.20 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball (mass = 0.0450 kg) and (c) an electron.

Two rods, one made of brass and the other made of copper, are joined end to end. The length of the brass section is 0.500 m and the length of the copper section is 0.700 m . Each segment has cross-sectional area 0.00700 m2 . The free end of the brass segment is in boiling water and the free end of the copper segment is in an ice-water mixture, in both cases under normal atmospheric pressure. The sides of the rods are insulated so there is no heat loss to the surroundings.

A. What is the temperature of the point where the brass and copper segments are joined?

B.

What mass of ice is melted in 9.00 min by the heat conducted by the composite rod? Express your answer with the appropriate units.

If you were to replace the ocean with or mercury or oil, which works best for a boat's ability to float?. Thank you.

A 6.0 kg freshwater fish at the surface of a lake is neutrally buoyant.If the density of its body with its swim bladder deflated is 1060 kg/m3, what volume of gas must be in the swim bladder for the fish to be neutrally buoyant? Express your answer to two significant figures and include the appropriate units.

1) A mover pushes a 5.87 kg box with a 48.1 N constant horizontal force up a 14.9° ramp that has a height of 2.56 m. If the ramp is assumed to be frictionless, find the speed of the box as it reaches the top of the ramp using work and energy.

2) A 1100 kg car is traveling 35.5 m/s when it comes up to the bottom of a 14.0° hill. If the car coasts up the hill and the coefficient of rolling friction is 0.450, how far up the hill will the car travel?

1.) A 1.00m long, 5.00kg rod is held at one end. How much torque is generated by the bar? What happens to the torque if the mass remains consant but the length is doubled?

2.) A large light (2.00kg) is held away from a wall by a 50.0cm rod (massless) and a cable that attaches to the wall at a 45 degree angle. Find the forces provided by the wall and the cable on the rod.

Compare and contrast the eye and a camera. What parts of the camera correspond to the iris, the retina, and the cornea of the eye?

This week two big concepts discussed are electric fields and electric potential, with electric potential being the basis for voltage. Along with the general discussion of these concepts, some interesting and common applications were briefly talked about like copiers, printers, TVs, etc.

Can you find two examples - one for electric field, one for electric potential - that are connected to the field of biology

Please no handwritten or picture responses - only typed replies.

Suppose you are viewing some red light coming from a galaxy far, far away. The wavelength of the red light is expected to be 6300 nm if the relative speed of the galaxy with respect to your world is zero. That is, if the galaxy and you are not moving toward or away from each other. However, you observe a wavelength that is longer than expected. How would you interpret this observation?     Recall the frequency dependence of the Doppler shift: f’ = f (1 ⁺ u/c).

Compare and contrast alpha and beta decay.

What type of decay should 32Si undergo, and why?

A cube with side length L, and density ρ_C sits at rest on a bathroom scale at the bottom of a large tank. The tank is partially filled with a fluid having density ρ_f, leaving the cube partially submerged. A side profile view of the cube shows the cube face a distance d outside of the fluid, and a distance L-d submerged under the fluid. Determine the distance dwhen ρ_f= 2000 kg/m³, ρ_C= 4000 kg/m³and L = .50 m. Write every step with detail specially when solving for the unknown, since I am trying to learn how to do it and also draw a diagram.

Red light of wavelength 675 nm is incident on a slit of width 4.56 × 10−6 m. An observing screen is placed 1.50 m from the slit.

9a) Find the distance between the third order dark fringe and the central bright fringe (in meters).

9b) If you replaced the single slit with two slits centered on the former position of the single slit, what would the separation between the two slits need to be in order for the second order bright fringe of the double-slit interference pattern to fall on the third order dark fringe of the single slit diffraction pattern?

9c) If the average adult pupil diameter is 3.5 mm, what distance from the observing screen is a person no longer able to resolve (distinguish) the second order bright fringe and the central bright fringe in the double slit interference pattern?

Consider a point charge +q. A) Sketch the electric field lines and equipotetial lines near the charge. B) Explain how to interpret these equipotential lines. In other words, what does electric potential mean in terms of work? C) Indicate the direction of increasing potential in your sketch. D) Consider one potential line in your sketch. How much work is required to move a charge anywhere along that line.