Is the following equation dimensionally correct?
v= sqrt(pH/PE)
v= feet per second
p = grams per cubic cm
H = height in feet
PE = joules
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Discuss Fermi theory of Beta Decay in detail?
and what do you mean by nuclear isomerism in Nuclear Physics?
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1)
A homogeneous solid object floats on water with 78% of its
volume below the surface. The same object when placed in a second
liquid floats on that liquid with 71% of its volume below the
surface.
Determine the density of the object.
2)
Determine the specific gravity of the liquid.
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Question 5.
A nailing gun produces a short, loud sound as the tool drives in a
nail. The sound has an intensity
level of 136 dB at the ear of the user (0.2 m from the tool), for a
duration of 0.1 s.
(a) What is the corresponding sound intensity? (1.5 marks)
(b) The tool is a good approximation to a point source of sound.
What is the rate at which it
produces sound energy? (1.5 marks)
(c) How much energy would be transported to the user’s eardrum (of
area 6.0 x 10-5 m2) as the
tool drives in a nail? (1.5 marks)
(d) Explain why earplugs or earmuffs are recommended to be worn
when using the tool.
(0.5 mark)
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A 36 V battery of negligible internal resistance is connected to a 47 kΩ and a 21 kΩ resistor in series.
a).
What reading will a voltmeter, of internal resistance 95 kΩ , give when used to measure the voltage across the first resistor?
Express your answer using two significant figures.
V47 kΩ=
b).
What is the percent inaccuracy due to meter resistance for each case?
Express your answer using two significant figures.
V not ideal−V ideal/V ideal=
c).
What reading will a voltmeter, of internal resistance 95 kΩ , give when used to measure the voltage across the second resistor?
Express your answer using two significant figures.
V21 kΩ=
d).
What is the percent inaccuracy due to meter resistance for each case?
Express your answer using two significant figures.
V not ideal−V ideal/V ideal=
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4) A planet is orbiting a star at a distance of 1.20 × 1011 m with a period of 0.750 Earth years. What is the acceleration of the planet?
5) A fan is rotating at a constant 360.0 rev/min. What is the magnitude of the acceleration of a point on one of its blades 10.0 cm from the axis of rotation?
6) A particle travels in a circular orbit of radius 10.0 m. Its speed is changing at a rate of 15.0 m/s2 at an instant when its speed is 40.0 m/s. What is the magnitude of the acceleration of the particle?
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In a single slit experiment, the central maximum is:
|
The same size as all of the other maximums. |
|
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Twice the size of the other maximums. |
|
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Half the size of the other maximums. |
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Just slightly larger than the other maximums. |
Electrons would be ejected from silver if the incident light had a frequency of:
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1.03 x 1015 Hz |
|
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1.02 x 1015 Hz |
|
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1.01 x 1015 Hz |
|
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None of the options is correct |
What is the mass equivalent of an x-ray with a frequency of 5.63 x 1017 Hz?
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4.14 x 10-33 kg |
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2.59 x 10-14 kg |
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1.24 x 10-24 kg |
|
|
None of the options is correct. |
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Tennis balls traveling at greater than 100 mph routinely bounce off tennis rackets. At some sufficiently high speed, however, the ball will break through the strings and keep going. The racket is a potential-energy barrier whose height is the energy of the slowest string-breaking ball. Suppose that a 100 g tennis ball traveling at 220mph is just sufficient to break the 2.0-mm-thick strings. Estimate the probability that a 150mph ball will tunnel through the racket without breaking the strings.
Give your answer as a power of 10 rather than a power of e.
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The drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. Surface (1) has an area of 2.10 m
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Prove that in a cubic crystal, a direction [hkl] is perpendicular to the plane (hkl) having the same indices.
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can a pendulum clock be used in an earth- satellite?
2) It is proposed to move a particle in SHM on a rough horizontal surface y applying an external force along the line of motion. Sketch the graph of the applied force against the position of the particle. Note that the applied force has two values for a given position depending on whether the particles is moving in positive or negative direction.
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True or false
1:The electric potential is the same at any point on a single equipotential line.
2:Electric field lines always emanate from positive charges and terminate on negative charges.
3:Equipotential lines always perpendicularly cross the electric field lines.
4:It is possible that equipotential lines occasionally cross each other.
5:The electric field lines point in a direction opposite to the equipotential lines.
6: Electric field lines emanating or terminating on an isolated charge are spaced uniformly as they emanate or terminate.
7:When mapping the equipotential lines, we need to take readings for the entire conductive sheet.
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TYPE with KEYBOARD, please please
What is the purpose of Conservation of linear momentum experiment?
What is the theory of Conservation of linear momentum experiment? Write a paragraph on elastic and inelastic collision. Include related equations as well
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