roadjester
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roadjester:
Group Title
40. A sample consists of \(1.00 X 10^6\) radioactive nuclei with a halflife of 10.0 h. No other nuclei are present at time t = 0. The stabl…
 updated 9 months ago
 62 replies
 1 Medal
Mathematics

Silent_Sorrow:
Group Title
Special Relativity  Use spacetime diagrams to propose a resolution to the runner on the train paradox.
 updated 10 months ago
 12 replies
 1 Medal
Mathematics

roadjester:
Group Title
Planck's constant and the photoelectric effect:
Someone help. I have no clue what the difference between standard deviation and standard …
 updated 10 months ago
 2 replies
 No Medals Yet
Mathematics

roadjester:
Group Title
32. An electron has a kinetic energy of 12.0 eV. The electron is incident upon a rectangular barrier of height 20.0 eV and width 1.00 nm. If…
 updated 10 months ago
 5 replies
 No Medals Yet
Mathematics

Silent_Sorrow:
Group Title
At noon a rocket ship passes the Earth with a velocity 0.8c. Observers on the ship and on the Earth agree that it is noon. At 12:30 pm as re…
 updated 10 months ago
 9 replies
 No Medals Yet
Mathematics

averyshred:
Group Title
One string of a certain musical instrument is 75.0cm long and has a mass of 8.77g . It is being played in a room where the speed of sound is…
 updated 10 months ago
 5 replies
 No Medals Yet
Mathematics

QueenBee232:
Group Title
In a thunderstorm at 20.0 C Amanda is able to see a lightning strike and hears the thunderclap about 3.0 s afterwards. How far was the light…
 updated 10 months ago
 11 replies
 1 Medal
Mathematics

Unitystep:
Group Title
In the most detail you can possibly explain, how would I find the 'K' or the spring constant of a slope where the 'y' axis is labeled as New…
 updated 10 months ago
 27 replies
 1 Medal
Mathematics

roadjester:
Group Title
28. Suppose a quantum particle is in its ground state in a box that has infinitely high walls (see Active Fig. 41.4a). Now suppose the left…
 updated 10 months ago
 1 reply
 No Medals Yet
Mathematics

QueenBee232:
Group Title
Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?
 updated 10 months ago
 17 replies
 1 Medal
Mathematics

CNmubarak:
Group Title
The sun radiates about 3.6 x 1026 joules of energy each second. How much mass does the sun lose each second? Show your work.
 updated 10 months ago
 4 replies
 No Medals Yet
Mathematics

CNmubarak:
Group Title
A force is a push or a pull. Newton's third law further defines the meaning of force. Explain.
 updated 10 months ago
 6 replies
 2 Medals
Mathematics

CNmubarak:
Group Title
Suppose you are on an airplane moving at high speed. If you flip a coin straight up it will land in your lap rather than a great distance be…
 updated 10 months ago
 3 replies
 2 Medals
Mathematics

ngott3:
Group Title
can someone explain the solution to me for this question
 updated 10 months ago
 3 replies
 4 Medals
Mathematics

Clink33:
Group Title
What is the magnitude of the force on an electron moving with a velocity v = 6.1106 m/s parallel to a magnetic field B = 1.83102 T?
…
 updated 10 months ago
 2 replies
 1 Medal
Mathematics

m806texas:
Group Title
so theres this physics question
 updated 10 months ago
 3 replies
 1 Medal
Mathematics

CNmubarak:
Group Title
A boy fires a table tennis launcher. Briefly describe the forces and impulses on the launcher and the ball. Which has more momentum? Which i…
 updated 10 months ago
 3 replies
 1 Medal
Mathematics

CNmubarak:
Group Title
In terms of momentum change, explain why it is best to "give" when catching a baseball. Provide other examples of situations in which you wa…
 updated 10 months ago
 7 replies
 No Medals Yet
Mathematics

briannamariee33:
Group Title
if an atom has 34 protons and 40 neutrons, what is its mass number?
 updated 10 months ago
 2 replies
 3 Medals
Mathematics

CNmubarak:
Group Title
You do work on something when you lift it against gravity. How does this work relate to gravitational potential energy? If the lifted object…
 updated 10 months ago
 7 replies
 1 Medal
Mathematics

m806texas:
Group Title
Consider a small car of mass 1296 kg and a large sport utility vehicle (SUV) of mass 3640 kg. The SUV is traveling at the speed limit (v = 3…
 updated 10 months ago
 3 replies
 No Medals Yet
Mathematics

babixz101:
Group Title
Which of the following is true about the atom shown below? Choose all that apply. (2 points)
https://www.connexus.com/content/media/886560…
 updated 10 months ago
 2 replies
 No Medals Yet
Mathematics

selenadebby:
Group Title
An 85m long train begins accelerating at a constant rate from rest. The front of the train passes a railway worker, who is standing 300 mete…
 updated 10 months ago
 4 replies
 No Medals Yet
Mathematics

QueenBee232:
Group Title
Which of the following kinds of electromagnetic radiation has the shortest wavelength and the highest energy photons?
ultraviolet waves
…
 updated 10 months ago
 12 replies
 1 Medal
Mathematics

Silent_Sorrow:
Group Title
Two inertial frames of reference O and O’ are in the standard configuration, frame O’ having velocity v with respect to frame O. At the inst…
 updated 10 months ago
 6 replies
 No Medals Yet
Mathematics

dixiemitsy:
Group Title
Would someone help me with this problem?
How many 160 resistors must be connected in parallel to draw a current of 6A from a 120V source?
 updated 11 months ago
 23 replies
 1 Medal
Mathematics

AleezaButler:
Group Title
Can someone check this worksheet for me?
 updated 11 months ago
 3 replies
 1 Medal
Mathematics

Mashy:
Group Title
Any Nice online course on Special theory of relativity? or any good website source?
Most I saw, have only the introductory concepts with …
 updated 11 months ago
 16 replies
 1 Medal
Mathematics

Data_LG2:
Group Title
In the figure below, the pulleys and the cord are light, all surfaces are frictionless, and the cord does not stretch.
(a) How does the a…
 updated 11 months ago
 2 replies
 1 Medal
Mathematics

harishk:
Group Title
Can any one tell me
how to separate hcl + water solution without adding any base.......?????
…
 updated 10 months ago
 10 replies
 No Medals Yet
Mathematics
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