In visible light, which color has the longest wavelength?'
Are Microwave, Visible Light, Gamma rays in order of lowest to highest energy?
are Radio broadcast, cell phone and GPS examples of technologies that uses radio waves
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Each of the two identical springs in the figure below has force constant k = 1.16 103 N/m, d = 1.21 m, and θ = 29.0°. (a) Find the unstretched length of each spring. (b) Find the instantaneous acceleration of the weight if it is pulled 10.0 cm lower and released.
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A charge of 3.77 μC is held fixed at the origin. A second charge of 3.45 μC is released from rest at the position (1.25 m, 0.570 m).
A.) If the mass of the second charge is 2.85 g , what is its speed when it moves infinitely far from the origin?
B.)At what distance from the origin does the second charge attain half the speed it will have at infinity?
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The blood speed in a normal segment of a horizontal artery is 0.100 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to 1/5 of its normal cross-sectional area. What is the difference in blood pressure between the normal and constricted segments of the artery?
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An object with mass 0.190 kg is acted on by an elastic restoring force with force constant 10.3 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.90×10−2 J.
A) What is the amplitude of oscillation?
Express your answer with the appropriate units.
A=
B) What is the potential energy when the displacement is one-half the amplitude?
Express your answer with the appropriate units.
U=
C) At what displacement are the kinetic and potential energies equal?
Express your answer with the appropriate units.
x=
D) What is the value of the phase angle ϕ if the initial velocity is positive and the initial displacement is negative?
Express your answer in radians.
phi =
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1. In your own words, explain why Einstein's "greatest blunder" is no longer considered a blunder.
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7. An inductor is designed to filter high frequency noise from power supplied to a personal computer. Do you connect the inductor in series or in parallel with the computer? Explain.
Please explained detailed step by step, with diagram.
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In music, middle C has a frequency of about 256 Hz - the precise frequency depends on the tuning scheme. How does the wavelength of a middle C note propagating through air compare to the size of a typical human body? How does the wavelength of the same note propagating through water compare to the human body? What frequency of sound in air has a wavelength nearly the size of a human head? This size is important because we have diminished ability to determine the direction to a source of this tone.
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Neutron interactions
[5 marks] Calcu late the m aximum energy transfer of a 2 MeV neutron via an elastic scatterin g collision with 1 H and 12 C nucle i, respectively.
[5 marks] Calculate the number of collisions to slow the 2 MeV neutron down to the thermal energy (0.025 eV) with the 1 H and 12 C moderators, respectively .
[4 marks] Discuss the efficiency of the processes that slow down the neutron using the results obtained in (b).
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A stick is resting on a concrete step with 2727 of its total length ?L hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. A moment later, a second, identical ladybug lands on the other end of the stick, which results in the stick coming momentarily to rest at ?=41.3∘θ=41.3∘ with respect to the horizontal, as shown in the figure.
If the mass of each bug is 3.093.09 times the mass of the stick and the stick is 16.3 cm16.3 cm long, what is the magnitude of the angular acceleration ?α of the stick at the instant shown?
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At what distance on the axis of a current loop is the magnetic field half the strength of the field at the center of the loop? Give your answer as a multiple of R.
Express your answer in terms of R using two significant figures.
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When a 26.0-V emf device is placed across two resistors in series, a current of 11.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 59.0 A. What is the magnitude of the larger of the two resistances?
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At the rate at which the Sun is losing mass in the solar wind, how many years will it take the Sun to lose as much mass as Uranus?
It will take ___ × 108 years.
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The accelerating force of the wind on a small 300-kg sailboat is 780 N northeast. If the drag of the keel is 552 N acting west, what is the acceleration of the boat?
A. 4.4 m/s2 due east
B. 1.8 m/s2 due north
C. 2.6 m/s2 northeast
D. 3.2 m/s2 north by northwest
E. 0.23 m/s2 due east
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The uncorrected eye. For the following questions, assume that
the distance between the eye lens and the retina is 1.70 cm. In
other words, since the image is always formed on the retina, the
distance between the lens and the image is always 1.70 cm. Also
note that, as is seen in the ray diagram, since the eye lens is
converging and the image is on the opposite side of the lens
compared to the object, the image is always real.
part e) The nearsighted patient in part c tries to view an object
that is very far away (object at infinity). Use the focal length
calculated in part c to determine the location of the image. How
does this compare to the distance from the eye lens to the retina?
What kind of image is seen on the retina?
part f) The farsighted patient in part d tries to view an object
that is 25cm away, which a person with normal vision can see
clearly. Use the focal length calculated in part d to determine the
location of the image. How does this compare to the distance from
the eye lens to the retina? What kind of image is seen on the
retina?
calculated pt c: f= 1.70cm calculated pt d: f= 1.63cm
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