Calculate the well potential for the fission decay channel resulting in 140Ba and 98Kr.
In: Physics
What is meant by the term `dynamic range' in the context of a
data acquisition system? How can selection of
the wrong dynamic range affect either (a) the precision of the
experimental measurements, or (b) capture of
the entire signal of interest.
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A 0.300-kg ice puck, moving east with a speed of 5.84 m/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic.
A) What is the speed of the 0.300-kg puck after the collision?
Express your answer to three significant figures and include the appropriate units.
B) What is the direction of the velocity of the 0.300-kg puck after the collision? East or West?
C)
What is the speed of the 0.990-kg puck after the collision?
Express your answer to three significant figures and include the appropriate units.
D) What is the direction of the velocity of the 0.990-kg puck after the collision? East or West?
In: Physics
In a test of the elasticity of basketballs, a basketball fired by an air gun against a solid wall, compressing it to 80.0 % of its original volume. The air inside the ball (assume it is all N2 gas) is originally at a temperature of 20.0 ∘C and a pressure of 2.00 atm. The ball's radius is 11.95 cm.
A. What temperature does the air in the ball reach at its maximum compression? Assume that the compression of the air during the bounce is adiabatic.
B. By how much does the internal energy of the air change between the ball's original state and its maximum compression?
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An energy plant produces an output potential of 2100 kV and serves a city 238 km away. A high-voltage transmission line carries 580 A to the city. The effective resistance of a transmission line [wire(s)] is 1.83 Ω/km times the distance from the plant to the city. What is the potential provided to the city, i.e., at the end of the transmission line? Answer in units of kV. 005 (part 2 of 4) 10.0 points How much power is dissipated due to resistive losses in the transmission line? Answer in units of W. 006 (part 3 of 4) 10.0 points Assume the plant charges $ 0.097 /kW · hr for electric energy. At this rate, how much does it cost to transmit energy to the city (by the transmission line heating the atmosphere) each hour? Answer in units of dollars/hr. 007 (part 4 of 4) 10.0 points Consider the money lost by the transmission line heating the atmosphere each hour. Assume the energy plant produces the same amount of power; however, the output electric potential of the energy plant is 20% greater. How much money per hour is saved by increasing the electric potential of the power plant? Answer in units of dollars/hr.
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A 45.4 kg, 3.8 m uniform ladder leans against a frictionless wall. A 99.1 kg person is standing on the ladder down 1.04 m from the top of the ladder. The ladder makes an angle of 50 degrees with the horizontal. What is the minimum coefficient of static friction between the ladder and the ground so that the ladder does not slip?
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A very metal train moving at a constant speed is passing a hippie observer on a platform. On one of the train cars, a Deathcore guitarist is continually hammering out a note at a frequency of 450 Hz. After the guitarist has passed, the hippie hears the sound with a frequency of 420 Hz. What is the speed of the train?
Please explain work, I always rate!!:)
In: Physics
In an industrial cooling process, water is circulated through a
system. If water is pumped with a speed of 4.00 m/s under a
pressure of 6.70 × 105 Pa from the
first floor through a 3.70-cm diameter pipe, what will be the
pressure on the next floor 3.90 m above in a pipe with a diameter
of 2.00 cm?
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The water flow rate for a particular sprinkler is 18 gpm. The water must be projected at least 22 feet in radius. The sprinkler is mounted 10 feet above the ground and is aimed at an angle of 29 degrees above the horiztonal. With what velocity must the water leave the sprinkler? What diameter (inches) should the opening be to achieve this velocity?
Water Velocity = ft/s
Diameter Opening = inches
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What is the smallest area of ice 29 cm thick that will support a 85 kg man? The ice is floating in freshwater.
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Billiard ball A of mass mA = 0.116 kg moving with speed vA = 2.80 m/s strikes ball B, initially at rest, of mass mB = 0.135 kg . As a result of the collision, ball A is deflected off at an angle of θ′A = 30.0∘ with a speed v′A = 2.10 m/s, and ball B moves with a speed v′B at an angle of θ′B to original direction of motion of ball A. Solve these equations for the speed, v′B, of ball B after the collision. Do not assume the collision is elastic.
In: Physics
In: Physics
1. Discuss how a missing atom at a lattice side contributes to the conductivity of a semiconductor
2. Estimate the energy of a photon of X rays. (Answer: 12 keV)
3. On the one hand, we say that electrons in atoms have discrete energies; on the other hand, we say that there is inherent uncertainty in our ability to measure energies. Is there a conflict here?
4. You have just calculated the number density of p-carriers in undoped germanium, a semiconductor, at room temperature. Is it necessary to make a second calculation to find the number density of free electrons?
5. Estimate the energy of a photon of visible light. (Answer: 2.4 eV)
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Suppose that a cannon tower of 1000 feet height was erected at the origin of the coordinate space. The speed of the cannonballs launched by the tower is 1000 feet per second. An armored vehicle is patrolling in a circular path around the tower 8000 feet away at a speed of 10 feet per second. Coordinates was chosen such that at time zero the location of the vehicle is (8000, 0, 0).
(a) Describe the motion of the vehicle with a vector valued function with respect to time t.
(b) At time zero, a cannonball is launched from the tower in the direction of u = <u1,u2,u3>, where ||u|| = 1. Ignoring all resistive forces, describe the motion of the cannonball with a vector valued function with respect to time t. Gravitational acceleration g = 32 ft/s2.
(c) Determine whether it is possible for the cannonball to hit the vehicle. If it is, find the direction in which the cannonball should be launched, and express your answer as a unit vector.
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In a particular frame of reference a virtual particle appears to travel at a speed twice the speed of light. How fast must a different frame move in order for this particle to appear to move instantaneously?
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