A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.06, for a distance d = 6.7 m. Then the mass is continued to be pulled up a frictionless incline that makes an angle ? = 33° with the horizontal. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of ? = 33° (thus on the incline it is parallel to the surface) and has a tension T = 46 N.

What is the work done by tension before the block gets to the incline?

What is the work done by friction as the block slides on the flat horizontal surface?

What is the speed of the block right before it begins to travel up the incline?

How far up the incline does the block travel before coming to rest?

What is the work done by gravity as it comes to rest?

During the entire process, the net work done on the block is:

Water movinng in a horizontal pipe has a velocity of 9.0 m/s when the radius of the pipe is 0.0025 metr. determine the velocity of the water when it enters a wider section of the pipe and the radius is 0.075 meter.

Please show work

Determine the density of a unkown smaple by using Archemdes Principle and water. the mass measurement of the sample in air is 200 grams, the mass measurement of the sample in water 147 grams.

please show work

Consider a mass spring system. The spring has a constant k=30N/m and mass=3kg. The mass oscillates w/amplitude of 10cm. a.)what is the frequency of oscillation b.) what is the displacement at time t=0 c.) when is the first time the mass is at maximum displacement? (t=?) d.) what is the maximum acceleration felt by the mass? Where in the motion does this occur? e.)what is the minimum acceleration felt by the mass? Where in the motion does this occur? f.)What is the max potential energy stored in the spring (PE=1/2kx^2)? g.) since energy is conserved, what is the max velocity of the mass (KE=1/2mv^2)?

A 4.00 −kg ball is dropped from a height of 14.0 m above one end of a uniform bar that pivots at its center. The bar has mass 5.50 kg and is 7.40 m in length. At the other end of the bar sits another 5.30 −kg ball, unattached to the bar. The dropped ball sticks to the bar after the collision.

How high will the other ball go after the collision?

How do you do this? How do you set it up?

One mole of a ideal gas initially at temp To=0C undergoes an expansion at a constant pressure of 1atm to four times it original volume. (a) calculate the new temp Tf of the gas. (b) calulate the wok done by the gas during the expansion.

A wood cube 0.40 m on each side has a density of 750 kg/m³ What mass has to be placed on top of the wood so that its top is just at the water level?

What is the energy of a typical visible photon? How many photons enter the eye pre second when one looks at a weak source of light such as the moon who's intensity is about 4.0e-4 w/m 2? Assume a typical visible wavelength be 550nm and diameter of the eye pupil is 8.0 mm

A certain microscope consists of an objective lens, (Lens 1), and a tube lens (Lens 2). The object is placed at the front focal plane of the objective lens and the image is at the back focal plane of the tube lens. The tube lens has a focal length of 200mm. The objective is labeled 20X, which means that the magnification will be 20 when used with this particular tube lens. The working distance (the distance from the object to the front vertex of the objective is given in the instruction manual as 7 mm. The lenses are separated by the sum of their focal lengths. Assuming thin lenses what is the matrix for the combination?

Now the objective isn’t really a thin lens (or even a simple one). Where is its front principal plane located?

Now you have bought the microscope objective talked about above, but you want to build your own microscope. Your tube lens has a focal length of 100mm. You will change the spacing of the lenses so that it is still the sum of the focal lengths. What is the magnification of your microscope.

Two stationary positive point charges, charge 1 of magnitude 3.45nC and charge 2 of magnitude 1.80nC , are separated by a distance of 40.0cm . 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

vfinal of the electron when it is 10.0cm from charge 1?

Consider three point charges at the corners of an equilateral triangle, its base sitting on the x-axis, with charge qA positioned at the origin, qB is at x=+3.50 cm, and qC is at the (top) third corner. qC = +2.60 μC, and the net electric force on qC is 375.0 N in the negative y direction. a. Explain briefly but clearly how you know that qA and qB must have the same magnitude charge and what the sign of that charge must be. b. Find the sign and magnitude of the charges on qA and qB.

Jack (mass 56.0 kg) is sliding due east with speed 8.00 m/s on the surface of a frozen pond. He collides with Jill (mass 44.0 kg ), who is initially at rest. After the collision, Jack is traveling at 5.00 m/s in a direction 34.0∘ north of east. Ignore friction. a) What is the direction of the Jill's velocity after the collision? b) What is the magnitude of the Jill's velocity after the collision?

How does an electron microscope work? Please explain in detail.

A uniform cylinder of radius R and mass M is mounted so as to rotate freely about a horizontal axis that is parallel to, and a distance h from the central longitudinal axis of the cylinder. (a) What is the rotational inertia of the cylinder about the axis of rotation? (b) If the cylinder is released from rest with its central longitudinal axis at the same height as the axis about which the cylinder rotates, what is the angular speed of the cylinder as it passes through its lowest position? State your answers in terms of the given variables, using g when appropriate.

Pre-Lab Questions

1.   How are electric potential and electric field similar? How are they different?

2.   Draw the equipotential lines for a single, positive, charge.

3.   If you were to walk on an equipotential line, how would your electric potential change over time?

4.   What does it mean when equipotential lines are closer together? What does it mean when they are farther apart?

5.   What direction do electric fields travel?

a) Explain with quantification the terms ‘thermal’ and ‘fast’ to describe neutrons.
b) Describe fully three important neutron interactions in a thermal nuclear power reactor.
c) Describe the range of materials in which these neutron interactions occur and their function in a
nuclear reactor.
d) Explain the criticality of the power generation process in terms of these reactions and give a
relevant equation with explanation.