• Using the part 1 data from your physics lab above calculate the following; calculated angle, observed angle and percent difference (show all work outside the table)
• For parts 1, 2, 3, and 4., use L and y to calculate the observed angle. Excel works in radian mode. You can force it into degree mode by using: sin(radians(B4)) or degrees(asin(C4/D4)) where B4 is your angle in degrees and C4 and D4 would be distance measurements.
• For parts 1, 2, and 3, use the wavelength, order number, etc., to calculate the expected angle.
• For parts 1, 2, and 3, calculate the percent difference between the observed and expected angle.

Why do the voltage and current in the pickup coil cycle between negative and positive? Explain in detail using Faraday’s Law. Remember, Lenz’s Law is part of Faraday’s Law! Although it will not be covered explicitly in this class, this is known as alternating current. Points to discuss: How the magnetic flux through the loop changes as the magnet rotates. Is the flux maximal when the magnet is horizontal or vertical on the screen? Why?) How this changing magnetic flux works to create an emf (potential difference) in the coil which alternates over time (use the Faraday’s law equation)

A 3 m^3 rigid tank contains 10 kg of H2O at 70 C.

a. Determine the specific volume of the system

b. Determine the pressure

c. The phase description and quality (x) if it is in the two phase region (saturated mixture)

d. The mass of each phase of water

e. The specific internal energy (u) of the system

A small rock with mass 0.30 kg k g is released from rest at point A A , which is at the top edge of a large, hemispherical bowl with radius R R = 0.48 m m (the figure (Figure 1)). Assume that the size of the rock is small compared to R R , so that the rock can be treated as a particle, and assume that the rock slides rather than rolls. The work done by friction on the rock when it moves from point A A to point B B at the bottom of the bowl has magnitude 0.22 J J .

a. Between points AA and BB, how much work is done on the rock by the normal force?

c. What is the speed of the rock as it reaches point BB?

d.Of the three forces acting on the rock as it slides down the bowl, which (if any) are constant and which are not? Explain.

e. just as the rock reaches point BB, what is the normal force on it due to the bottom of the bowl?

An object is thrown upward with an initial velocity of 32.1 m/s. When the object reaches it maximum height, it is true of the acceleration, a, and the velocity, v, that:

both its acceleration and velocity are zero

both its acceleration and velocity change sign

velocity is equal to zero, but acceleration is not

acceleration is equal to zero, but velocity is not

None of the above.

Please help. Only one answer is true. Please give reason why.

A tin can is filled with water to a depth of 43 cm . A hole 20 cm above the bottom of the can produces a stream of water that is directed at an angle of 34 ∘ above the horizontal.

Part A
Find the range of this stream of water.

Part B
Find the maximum height of this stream of water.

An antitank gun is located on the edge of a plateau that is 60 m above the surrounding plain. The gun crew sights an enemy tank stationary on the plain at a horizontal distance of 2.2 km from the gun. At the same moment, the tank crew sees the gun and starts to move directly away from it with an acceleration of 0.90 m/s². If the antitank gun fires a shell with a muzzle speed of 240 m/s at an elevation of 10deg. above the horizontal, how long should the gun crew wait before firing if they are to hit the tank.

ll

A 1.4-cm-tall object is located 3.0cm to the left of a converging lens with a focal length of 4.0cm . A diverging lens, of focal length -7.4cm, is 14cm to the right of the first lens.

Find the position of the final image.

s2` = -5.7 cm

Find the size of the final image.

h2` = ?

Find the orientation of the final image.

a) real, upright

b) real, inverted

c) virtual, upright

d) virtual, inverted

If you mix 10.5 gm of steam at 100 C with 1,010.0 gm of ice at 0 C what is the change in entropy? Heat of fusion = 79 cal/gm, Heat of vaporization = 540 cal/gm

answer: 6.14

diagram with explanations please

You work for the National Park Service testing a small cannon used to prevent avalanches by shooting down snow overhanging the sides of mountains. In order to determine the range of the cannon, it is necessary to know the speed with which the projectile leaves the cannon (muzzle speed), relative to the ground. The cannon you are testing has a weight of 500 lbs. and shoots a 20-lb. projectile. During lab tests where the cannon is held and cannot move, the muzzle speed is 400 m/s. You want to calculate the projectile's muzzle speed with respect to the ground under field conditions when the cannon is mounted so that it is free to move (recoil) when fired. You take the case where the cannon is fired horizontally using the same shells as in the laboratory.

A 2.00 m long uniform steel bar rests on the ground and against the wall. Both the wall and the ground are frictionless. THe steel bar makes an angle of 50 degrees with the ground. To keep the steel bar in static equilibrium, a horizontal wite attaches the steel bar at 0.500m from the bottom to the wall. The mass of the steel bar is 60kg.

a) Draw a free body diagram showing all the forces on the steel bar b) Using total force =0 write down the equations for both x and y directions. Then solve or simplify the equations as much as you can. c) Choose a point at the axis of rotation and write down all the torques (with sign) based on your choice of rotational axis. Then using total toorque=0, solve all the unknown forces on the steel bar

A solid, homogeneous sphere with a mass of m₀, a radius of r₀ and a density of ρ₀ is placed in a container of water. Initially the sphere floats and the water level is marked on the side of the container. What happens to the water level, when the original sphere is replaced with a new sphere which has different physical parameters? Notation: r means the water level rises in the container, f means falls, s means stays the same. Combination answers like 'f or s' are possible answers in some of the cases i.e r or s, f or s, and r or f or s.

  The new sphere has a density of ρ > ρ₀ and a radius of r = r₀.
The new sphere has a mass of m = m₀ and a density of ρ > ρ₀.
The new sphere has a radius of r = r₀ and a mass of m > m₀.

The new sphere has a radius of r < r₀ and a mass of m > m₀.
The new sphere has a radius of r < r₀ and a density of ρ > ρ₀.

The new sphere has a mass of m < m₀ and a density of ρ >

Two balls of clay collide in a perfectly inelastic, head-on collision. Suppose m1 = 0.5 kg, m2 = 0.25 kg, v1o = +4 m/s, and v2o = -3 m/s. (a) Find the velocity of the combined clay ball after the collision. (b) Find the kinetic energy lost during the collision.

Write down the Beer-Lambert law as it applies to neutron radiography. Calculate the attenuation coefficient of hydrogen and iron for thermal neutrons and for 100 KeV X-rays (four attenuation coefficients in total). Show all steps and quote your resources. How will neutron beam attenuation differ between these two materials and between the two types of radiation?

You shoot an arrow into the air at an initial velocity of 12.5m/s at an angle of 40º.

1. Find the maximum height the arrow reaches in the air.
2. Find the time it takes to reach its maximum height.
3. Find the time it takes to hit the ground. Assume its flight in the air is symmetrical, with the first half of flight traveling upward, and the 2nd half of flight traveling downward.
4. Find how far away it hits the ground.