i) A circular coil with radius 20 cm is placed with
it’s plane parallel and between two straight
wires P and Q. The coil carries current Icoil = 0.5A . Icoil is in
clockwise direction when viewed
from left side. Wire P is located 40 cm to the left of a circular
coil and carries current Ip = 0.2A
while wire Q is located 80 cm to the right of the circular coil and
carries current IQ = 0.6A. Both
Ip and IQ are in the same directions into the paper. Determine the
resultant of magnetic field at
the centre of a circular coil from the top view.
[7 marks]
ii) If the current in wire P is out of the page,
determine the resultant of magnetic field at the centre
of a circular coil. (3marks)
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Question 12
Briefly explain the following:
(a) The Balmer jump
(b) The Lyman limit
(c) The 4000Å break
(d) A forbidden transition
(e) The hydrogen hyperfine transition producing 21cm radiation
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A constant force acts on a 600kg mass for 68s. The velocity of the mass is 10m/s before the force is applied. Its final velocity is 44m/s. What change in momentum does the force produce?
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during a baseball game, a batter hits a foul ball down the left field foul line. while being hit 0.762 m above the ground, the ball was given a velocity of 33.53 m/s at an angle of 55 degrees above the ground. 5 seconds after being hit, the ball was seen clearing a 11.28 m high wall in left field.
a) what is the horizontal distance from home plate to the left wall?
b) what is the vertical distance of the ball above the ground as it travels over the wall?
Please show me how to do this, I'm having a rough time figuring it out.
In: Physics
I need new and unique answers, please. (Use your own words, don't copy and paste), Please Use your keyboard (Don't use handwriting) Thank you..
talk in 500-520 words about (shear wave elastography)
Use your own words, don't copy and paste
Use your own words, don't copy and paste
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A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. It takes 3.7 J of work to compress the spring by 0.14 m . If the spring is compressed, and the mass is released from rest, it experiences a maximum acceleration of 12 m/s2.
Find the value of the spring constant.
Find the value of the mass.
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3. A positive point charge q = +3 µC is placed on the y axis at y = +5 cm. A negative point charge -q = -3 µC is placed at the origin.
a) At how many points on the y axis could an additional positive charge +q be placed without changing the potential energy of the system?
b) Calculate the work done by the field to bring in an additional point charge +q from infinity to the point A. (The other two charges are held in position during this procedure.
c) What is the potential energy U of the square arrangement of charges at right?
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An iron boiler of mass 180 kg contains 730 kg of water at 11 ∘C. A heater supplies energy at the rate of 58,000 kJ/h. The specific heat of iron is 450 J/kg⋅C∘, the specific heat of water is 4186 J/kg⋅C∘, the heat of vaporization of water is 2260 kJ/kg⋅C∘. Assume that before the water reaches the boiling point, all the heat energy goes into raising the temperature of the iron or the steam, and none goes to the vaporization of water. After the water starts to boil, all the heat energy goes into boiling the water, and none goes to raising the temperature of the iron or the steam.
How long does it take for the water to reach the boiling point from 11 ∘C∘C?
How long does it take for the water to all have changed to steam from 11 ∘C∘C?
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Answer briefly the following.
a) What is a primitive cell and write the basic simple cell
names.
b) Write the symmetry operations in crystals.
c) Write the diffraction condition in the Brilloun region with the
opposite lattice vector.
d) Describe Bragg's law and determine the condition of X-rays to be
diffraction in crystals.
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The potential of a particle is given as V (x) = -Vδ (x), with V being a positive number. Find the wave function and energy of the bounded states of this particle.
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A solenoidal coil with 20 turns of wire is wound tightly around another coil with 320 turns. The inner solenoid is 21.0 cm long and has a diameter of 2.50 cm . At a certain time, the current in the inner solenoid is 0.140 A and is increasing at a rate of 1800 A/s .
For this time, calculate the mutual inductance of the two solenoids;
For this time, calculate the emf induced in the outer solenoid by the changing current in the inner solenoid.
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A continuously operating coherent Binary Phase Shift Keying (BPSK) system is made by an engineer. He claims that it is having an average error probability of 10-5. The system produced 1000 errors in a day when tested with a data rate of 500 bits/s and the single-sided noise power spectral density is No=10-10 W/Hz. He also claim that the system is capable of maintaining the error rate even if the received power is as low as 10-6 W. Do you agree with his claims? Give justifications to your answer.
please, I need a clear answer.
In: Physics
Which assumption is true of an ideal gas?
a. The gas has volume because the particles take up space.
b. The particles experience no inter-molecular attractive
forces.
c. The particles undergo inelastic collisions with the surface of
their container.
d. The ideal gas model is not accurate under most conditions.
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A swimmer is peacefully floating motionless in a lake. Determine the fraction of the
total volume of her body which remains visible above the water, given that the density
of her body is 920 kg/m3, and the density of the lake water is 1025 kg/m3.
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The moon has a mass of about 7.3x1022kg amd a radius of 1738km.
a)Calculate the escape speed from the surface of the moon. Express the answer in km/sec.
b) A spacecraft of mass 250kg is launched from the surface of
the moon at a speed of 1500m/sec. Using conservation of mechanical
energy, compute the maximum distance reached by the spacecraft, at
which the spacecraft comes to a stop.
c) if the spacecraft is launched with an initial speed of 5500m/sec
from the surface of the moon, use conservation of mechanical energy
to determine how fast the spacecraft will be traveling when it is
very far from the moon.
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