Q4. A science project exhibit, a capacitor is connected in series with a bulb connected to an ac
source. If its voltage amplitude is held constant, choose the correct option for the light bulb to
glow the brightest at (a) high frequencies (b) low frequencies (c) The brightness will be same at
all frequencies. At what frequency the light bulb will glow the dimmest, if capacitor is replaced by
inductor? When an AC source is replaced by DC source find out whether the bulb will glow or
not in both cases? Justify your answer scientifically. In the above circuit 4.4 μF capacitor in series
with light bulb of resistance 1.5 kΩ connected to 240 V, 50 Hz? How can you evaluate the r.m.s
value of current through the entire circuit? Can you find the average power developed across
the entire circuit? When the capacitor is replaced by the inductor of 450 mH, how can you predict
the r.m.s current and average power in that circuit? In an LCR series circuit, when capacitive
reactance and inductive reactance are equal then what would be the r.m.s current flowing in the
circuit? Prove this r.m.s current higher than r.m.s current in LR and CR circuits calculated in
above cases? Justify your answer.

You are pushing a set of blocks along a frictionless horizontal surface. The blocks are arranged in order by the 1kg block, then the 2kg block, and then the 3kg block; you push the 1kg block.

a. Calculate the force exerted by the 3kg block on the 2kg block.

b. Calculate the force exerted by the 2kg block on the 1kg block.

For both parts show if you are using Newton's 2nd or 3rd Law and where.

List at least three surface imaging techniques, and describe advantage and disadvantage of each one.

when subjected to a force of compression, the length of a bone (compression Youngs modulus 9.3×10^9N/m2, tensile Youngs modulus 4.4x10^10N/m2) decreases by 1.9×10^-5m. when the same home is subjected to a tensile force of the same magnitude, by how much does it stretch?

Ionization Chamber region is used to detect high energetic ? and ? paricles while Proportinal region is suitable to detect ? and ? particles with low energy. Why?

Compton Scattering.A photon of wavelength λcollides elastically with a free electron (initially at rest) of mass m. If the photon scatters at an angle φfrom its original direction of travel, use conservation of relativistic linear momentum and conservation of relativistic energy to derive a mathematical expression for the scattered photon’s wavelength λ’.

1a) Marty McFly needs to go 88 mph (39.3 m/s) to jump back to the future. He is riding his hoverboard holding onto the side of a very very short train, which is chugging faster and faster toward the edge of a cliff (on a flat horizontal). If the cliff is 24 m tall and the train hits the ground 95 m from the base of the cliff, did Marty make it back to the future (how fast was the train going horizontally the moment it left the cliff?)?

1b) Is it possible that Marty’s SPEED increased AFTER the train left the tracks and went over the cliff? Explain. Bonus: What THEOREM might you use to figure out his SPEED right before he hit the ground? (Or explain how you would find his final speed)

1c) Could the horizontal component of his velocity have increased during the fall?

Please write it clearly and label the answers

Briefly explain how intrinsic germanium can be turned into an n-type germanium and a p-type
germanium by doping of selected impurity atoms. Sketch separate 2D diagrams to help illustrate
the bonding/structures of extrinsic Ge in the locality of the impurity atoms.
If an extrinsic germanium crystal has a hole concentration of 2.0x108 cm^-3 at 300 K. Calculate
the electron concentration, n. Is the extrinsic Ge semiconductor an n-type or p-type
semiconductor? Give your reason. (Given the intrinsic electron concentration, ni for Ge is 2.0x1013 cm^-3

Create a diagram and explain the right-hand rule for the motor principle.

Draw a diagram of a single loop DC motor and label all the parts. Write a few sentences explaining how the motor is able to spin.

thank you

An aircraft we will call the "receiver" is approaching a second aircraft in mid-air, which we will call the "tanker", for refueling. The receiver is following the same path as that of the tanker. The tanker is moving at a constant velocity of 500 feet per second, with its position at time t minutes given by s[t]=500t.

At time t = 0 seconds, the receiver is 2000 feet behind the tanker and has velocity 1000 feet per second. At this time, the receiver begins to decelerate at a constant rate, so that its position at time t (along the path of the tanker) is given by:

r[t]=-2000+1000t+1/2 at^2

where the distance is measured in feet, and a is the acceleration (which is negative). This latter function is carefully calculated by the crew so that in a short amount of time the receiver will catch up to the tanker, and at that instant they will match speeds. The receiver will then link up with the tanker and begin refueling.

Observing that both the position and the velocity of the receiver will equal those of the tanker at the time refueling begins, set up a system of equations for a and t (where a is the acceleration of the receiver and t is the time when the two aircraft meet). Solve your system to determine the following:

(a). How long will it take the receiver to catch up to the tanker?

(b). What is the deceleration (negative acceleration) of the receiver?

(c). Draw motion curves (position, velocity, and acceleration curves) for the receiver and the tanker and write a paragraph describing their motions in detail.

(d). Create a graph of the receiver's position and the tanker's position on the same axes. Also, define a function giving the distance between the receiver and tanker, and graph that function as well. Describe what these graphs illustrate.

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00 m to the north, 2.20 m northeast, and 1.10 m at 25.0° west of south. Starting at the same initial point, an expert golfer could make the hole in what single displacement?

Uranium-235 and a thermal neutron can fission into products such as strontium, cesium and cerium plus neutrons. Calculate the expected thermal power released if 236.0021 g of uranium 235 is fissioned into products weighing 235.8007 g over a one day period. (in megawatts)

Create a diagram of a current-carrying wire in a magnetic field. Draw the field lines and explain how the direction of force acting on the wire is determined.

#- Create a sketch of the experiment Michael Faraday performed, label all the parts, and write a brief explanation of how motion is created.

thank you

There are a couple of physics concepts in your paper that are very important — atomic structure and x-rays. Explain these ideas to the reader in terms that your peers in the class can understand. Feel free to use figures. If you do, be sure to give references.

Notes

X-rays are a form of electromagnetic (EM) waves.

EM waves a bit

what distinguishes x-rays from other kinds of EM waves.

Use the dimensional analysis to find the D-dependance of the van der Waals interaction Energy between two semi-infinite bodies.

N.B. : D is the distance between the two semi-infinite bodies.