Explain the role of mass transfer in the crystallization process and freeze drying ?

In two vertexes of an equilateral triangle located charge +q and –2q. Find vector of electric field in the third vertex if length of the side of the triangle is a. Diagram is a MUST.

x-ray Equipment Operation and Quality Assurance

Why does the term "density" not apply to digital? How does the histogram help to determine image brightness?

Consider a high energy photon interacting in tissue. The photon first interacts via pair production before undergoing a Compton Interaction. The positron from pair production undergoes annihilation at the end of its life (no longer in-flight). One annihilation photon undergoes a Compton interaction and scatters at an angle of 100 degrees.

Calculate the kinetic energy of the scattered photon.

A case of canned milk weighing 24 ?bs and is released from rest at the top of a plane metal slide which is 30 feet long and inclined of 45º to the horizontal. The air resistance (in pounds) is numerically equal to 1/3 the velocity (in feet per second) and the coefficient of friction on ice is 0.4:

A. Deduce the Differential Equation that models this movement
b. Calculate the velocity of the block at any time "?"
c. Determine the displacement at any time "?"
d. At what time does the milk can reach the end of the shot?

A chain fixed at its ends and subject to uniform gravitational force hangs in the shape of a catenary curve. A parameterization for this curve is r(t)= <t, a cosh t/a +b> Where a and b are constants. You have a 12 ft chain and hang it with its ends on hooks at (-5,10) and (5,10). Find the values for a and b that describe the resulting curve. What is the height of the lowest point of the chain?

Show that the total energy of a harmonic oscillator in the absence of friction is conserved.

An elevator system in a tall building consists of a 800-kg car and a 950-kg counterweight joined by a light cable of constant length that passes over a pulley of mass 280 kg. The pulley, called a sheave, is a solid cylinder of radius 0.700 m turning on a horizontal axle. The cable does not slip on the sheave. A number n of people, each of mass 80.0 kg, are riding in the elevator car, moving upward at 3.00 m/s and approaching the floor where the car should stop. As an energy-conservation measure, a computer disconnects the elevator motor at just the right moment so that the sheave–car– counterweight system then coasts freely without friction and comes to rest at the floor desired. There it is caught by a simple latch rather than by a massive brake. (a) Determine the distance d the car coasts upward as a function of n. Evaluate the distance for (b) n = 2, (c) n = 12, and (d) n = 0. (e) For what integer values of n does the expression in part (a) apply? (f) Explain your answer to part (e). (g) If an infinite number of people could fit on the elevator, what is the value of d ?

Design a synchronous counter, using T flip-flops, that has the following sequence: 0010, 0110, 1000, 1001, 1100, 1101, and repeat. From the undesired states the counter must always go to 0010 on the next clock pulse.

The force acts on a particle
F = 2xy ^ 2i + 2x ^ 2yj N
Find the work done by force by moving the body from the point (0,0) to the point (2,4) following the following paths

1) (0,0) -----> (2,0) -----> (2,4)

2) (0,0) ----> (0,4) ----> (2,4)

3) Along the line that joins both points

4) Along the parabola y = x ^ 2

5) Is a conservative force?

Please make the graphs and justify all your answers please like why the force is o nor conservative

A block of pine wood (p=.43 g/cm³) is floating on a pond. The block is 10 cm x 40 cm x 5 cm thick.

a) How much of the block protrudes above the water?

b) If the block is made to carry a load by placing additional mass on top of it, how much mass must be added to just submerge the block?

Please show all work. Thank you for the help!!!

Describe the photo electric event experimentally. Why can't the photoelectric phenomenon be explained by classical physics?

Please can someone double-check my answers?

1) A ball with a mass of 0.15 kg has a velocity of 5m/s. It strikes a wall perpendicularly and bounces off straight back with a velocity of 3 m/s. The ball underwent a change in momentum of?

1.20 kg*m/s

2) What braking force is supplied to a 3,000 kg car traveling with a velocity of 35 m/s that is stopped in 12 seconds?

F=8750 N

3) A 0.1 kg baseball is thrown with a velocity of 35 m/s. The batter hits it straight back with a velocity of 60 m/s. What is the magnitude of the average impulse exerted on the ball by the bat?

9.5 N*s

4) A 1 kg object is moving with a velocity of 6 m/s to the right. It collides and sticks to a 2 kg object moving with velocity of 3 m/s in the same direction. How much Kinetic energy is lost in the collision?

3J

5) A 2 kg mass moving with a velocity of 7 m/s collides elastically with a 4 kg mass moving in the opposite direction at 4 m/s. The 2 kg mass reverses direction after the collision and has new velocity of 3 m/s. What is the velocity of the 4 kg mass?

1 m/s

6) A mass of 3 kg is attached to a massless spring with a force constant 500 N/m. The mass rests on a horizontal frictionless surface. The system is compressed a distance of 30 cm from the springs initial position and then released. The momentum of the mass when the spring passes its equilibrium position is?

8660.25m/s

7) Can an object have energy without having momentum? Explain.

Yes an object can have energy without having momentum. For example, a rock that is at the top of a cliff has potential energy since it's not moving but there is no momentum.

8) Can an object have momentum without having energy? Explain.

No object that has momentum also has energy. This is because if the velocity is not then the kinetic energy is also not 0 momentum is a vector, but energy is a scalar.

9) An object of mass 2 kg has a linear momentum of 6 kg. m /s. What is this objects Kinetic energy?

9J

10) A box with a mass of 2 kg accelerates in a straight line from 4 m/s to 8 m/s due to the application of a force whose duration is 0.5 seconds. Find the average strength of this force?

16N

11) A 45 kg. girl is sitting on a seesaw 0.6 m from the balance point. How far, on the other side, should a 60 kg. boy sit so that the seesaw will remain in balance?

0.45m

12) A solid cylinder consisting of an outer radius R1 and an inner radius R2 is pivoted on a frictionless axle as shown. A string is wound around the outer radius and is pulled to the right with a force F1 = 3N. A second string is wound around the inner radius and is pulled down with a force F2 = 5N. If R1 = 0.75 m and R2 = 0.35m, what is the net torque acting on the cylinder?

-0.5Nm

15) An object of mass 0.5 kg., moving in a circular path of radius 0.25 m, experiences a centripetal acceleration of constant magnitude 9 m/s2 . What is the objects angular speed?

6 rad/sec

16) An object, originally at rest begins spinning under uniform angular acceleration. In 10 seconds, it completes an angular displacement of 60 rad. What is the value of its angular acceleration?

1.2 rad/s^2

17) The moment of Inertia of a solid uniform sphere of mass m and radius R is given by the equation I = (2/5) mR2 . Such a sphere is released from rest at the top of an inclined plane of height h= 10 m, length L, and the incline angle Ω. If the sphere rolls without slipping, find the linear speed at the bottom of the incline.

11.83m/s

18) An object spins with angular velocity 10 rad/s. If the objects moment of Inertia increases by a factor of 2 without the application of an external torque, what will be the object’s new angular velocity?

1/2 angular velocity (w)

19) A 0.05 kg ball is thrown upward from the ground with an initial velocity of 30 m/s. At its maximum height, the magnitude of the balls acceleration is?

9.80 m/s^2

20) A 15 Newton force is applied to a mass M that is adjacent to a wall, as shown. If the mass is 2 kg, the force that the wall exerts on the mass is equal to?

15N

Demonstrate that the WKB approximation yields the energy levels of the linear harmonic oscillator and compute the WKB approximation for the energy eigenfunctions for the n=0 and n=1 state and compute with the exact stationary state solutions.

Two charges Q1(+2.00µC) and Q2(+2.00µC) are placed symmetrically along the x-axis at x = ±3.00cm. Consider a charge Q3 of charge +5.00µC and

mass 10.0 g moving along the y-axis. If Q3 starts from rest at y=2.00cm, what is its speed when it reaches y=4.00cm?