##### 2.5 Use the de Broglie relation λ=h/p to find the wavelength of electrons with kinetic energy...

2.5 Use the de Broglie relation λ=h/p to find the wavelength of electrons with kinetic energy equal to 550 eV. Indicate if relativistic or classical calculations are required.

2.3 Determine the energy of an electron and a photon if each has momentum equal to 1.071 x 10-21 kgm/s. Provide answer with 4 significant figures.ual to 550 eV. Indicate if relativistic or classical calculations are required.

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##### An L-R-C series circuit consists of a 60.0 Ω resistor, a 10.0 μF capacitor, a 3.60...

An L-R-C series circuit consists of a 60.0 Ω resistor, a 10.0 μF capacitor, a 3.60 mH inductor, and an ac voltage source of voltage amplitude 60.0 V operating at 1450 Hz .

a.) Find the current amplitude across the inductor, the resistor, and the capacitor.

b.) Find the voltage amplitudes across the inductor, the resistor, and the capacitor.

c.) Why can the voltage amplitudes add up to more than 60.0 V ?

d.) If the frequency is now doubled, but nothing else is changed, which of the quantities in part A and B will change?

- only current amplitude will change

-only voltage amplitude across the inductor and capacitor will change

-only voltage amplitude across the inductor will change

-current amplitude and voltage across the any circuit element will change

e.) Find new current amplitude across the inductor, the resistor, and the capacitor.

f.) Find new voltage amplitudes across the inductor, the resistor, and the capacitor.

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##### 1) Conceptual differences and differences in equations between the electric dipole and magnetic dipole. Add as...

1) Conceptual differences and differences in equations between the electric dipole and magnetic dipole.

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##### Does the acceleration vector change at all throughout the projectile’s flight? Why or why not? Compare...

Does the acceleration vector change at all throughout the projectile’s flight? Why or why not?

Compare two complementary angles such as 30? and 60?. What is the same? What is different?

How does changing the initial velocity affect the projectile’s motion?

How does the time spent in the air depend on the launch angle?

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##### using energy: a mass, m1 = 5kg, resting on a frictionless ramp is connected to a...

using energy: a mass, m1 = 5kg, resting on a frictionless ramp is connected to a cable that passes over a pulley which is then attached to a second hanging mass, m2 = 2. see diagram. if the blocks are released from rest, then how far will the have moved when their velocities are 4 m/s

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##### You wish to buy a new freezer for your basement. The primary use of the freezer...

You wish to buy a new freezer for your basement. The primary use of the freezer will be to prepare ice for family parties. You have a very large family, with grandparents, parents, sisters, brothers, uncles, aunts, cousins, nephews, nieces, and grandchildren. As a result, family birthday parties are held every couple of weeks, and you need lots of ice for drinks. You want the freezer to convert 10.1 kg of water at 23.0°C to 10.1 kg of ice at

−9.4°C

in 2.00 h. But, in order to keep your electric bill down, you want the power rating of the freezer to stay below 100 W. From these requirements, you determine the minimum COP of the freezer that will satisfy your needs. (Consider that the specific heat of water is 4,186 J/(kg · °C), the specific heat of ice is 2,090 J/(kg · °C), the latent heat of fusion of water is 3.33 ✕ 105 J/kg, and the latent heat of vaporization of water is 2.26 ✕ 106 J/kg.)

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##### With the aid of a diagram, write a short account of the image formation process in...

With the aid of a diagram, write a short account of the image formation process in the human eye. Include notes on the correction of common conditions (myopia, hypermetropia and presbyopia) using suitable lenses

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##### 1. What is a given= 0.215 [ms^-2] and diameter of disk with uniform mass distribution= 19.5...

1. What is a given= 0.215 [ms^-2] and diameter of disk with uniform mass distribution= 19.5 [cm].

theta= ?

2. Using information found in previous question, if the dropping mass is 195 [g], then what is T?

T= ? [Nm]

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##### A hollow plastic sphere is held below the surface of a freshwater lake by a cord...

A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.700m3 and the tension in the cord is 840N. What is the mass of the sphere?

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##### height time1 time2 time3 time4 avg time 2 m 0.45 s 0.43 s 0.35 s 0.36...

 height time1 time2 time3 time4 avg time 2 m 0.45 s 0.43 s 0.35 s 0.36 s 0.39 s 1.8 m 0.4 s 0.5 s 0.48 s 0.42 s 0.38 s 1.4 m 0.41 s 0.36 s 0.37 s 0.33 s 0.37 s 1.1 m 0.37 s 0.33 s 0.33 s 0.40 s 0.36 s

1) Using one of your heights and times from when the object was released to when the object hits the floor, calculate g. (This is an experimental value of g)

2) Using all of you height data points, figure out how to make a linear graph of height and time. Determine the slope of the graph. This is related to your second experimental value of g. Determine your second experimental value of g.

3) compare both your experimental values of g to the theoritcal value.

4) What is the percentage difference btween your experimetal values of g and the accepted value, 9.81m/s2 ?

5) How do you account fo this difference?

6) Does the theoritcal value for g fall within the final error range (the uncertainity) of your experimental value?

7) Explain with the primary limitation on your data and how it can be corrected. What factor in the experiment had the biggest effect on collecting valid data and how would you make the experiment more accurate?

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##### Correct asnwer for 5 star rating. Suppose that you release a small ball from rest at...

Correct asnwer for 5 star rating.

Suppose that you release a small ball from rest at a depth of 0.520 m below the surface in a pool of water. If the density of the ball is 0.285 that of water and if the drag force on the ball from the water is negligible, how high above the water surface will the ball shoot as it emerges from the water? (Neglect any transfer of energy to the splashing and waves produced by the emerging ball.)

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##### Cesium-124 has a half-life of 30.9 s. a) How many Cs-124 nuclei are in 19 micrograms...

Cesium-124 has a half-life of 30.9 s.

a) How many Cs-124 nuclei are in 19 micrograms of said isotope?

b) How about after 2.4 min?

c) How strong is its activity then?

d) After which time has activity dropped below 1.0 Bq?

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##### What is fluorescence and how is it generated? explain absorption and emission

What is fluorescence and how is it generated? explain absorption and emission

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##### The two wires carry current i1 and i2, respectively, with positive current to the right. The...

The two wires carry current i1 and i2, respectively, with positive current to the right. The charge q is positive and has velocity v to the right.

True False  If i1 is greater than i2, then the force on q is north.
True False  If v = 0, then the force on q is zero.
True False  If i2 = - i1 then the force on q equals zero.
True False  If i2 = 0 and i1 is greater than zero, then the force on q points into the page.
True False  If i1 = 0 and i2 is greater than zero then the force on q is south.
True False  If i2 = 0 and i1 is greater than zero, then the magnetic field near charge q points out of the page.
True False  If i1 = i2, then the wires are attracted to each other.

 Incorrect. Tries 4/20 Previous Tries

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##### 8.) When you look at most people

8.) When you look at most people

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