A sheet of glass is coated with a 501-nm-thick layer of oil (n = 1.42).
1.For what visible wavelengths of light do the reflected waves interfere constructively?
2.For what visible wavelengths of light do the reflected waves interfere destructively?
3.What is the color of reflected light?
| Red | |
| Yellow | |
| Orange | |
| Green-blue |
4.What is the color of the most part of transmitted light?
| Yellowish green | |
| Blue | |
| Orange | |
| Red |
In: Physics
consider a device to register osmotic pressure, in which it is placed a solution containing 20 grams of hemoglobin in a liter of solution in the right compartment and pure water in the left compartment is placed. Explain the phenomenon that occurs and determine the molecular weight of the hemoglobin if at equilibrium, the water height of the right column is 77.8 mm above the left column if the temperature remains at 35 ° C
In: Physics
-Do electric fields extend through the interior of an insulator in static equilibrium?
-Do electric fields extend through the interior of an conductor in static equilibrium?
-What is the relationship between electric field lines and equipotential lines?
In: Physics
6. [2pt]
In the lab Springs, a student sits on a bosun's chair
suspended by a spring. If the spring
has a spring constant, k = 1020 N/m, and is stretched by 0.5 m,
how
much energy is stored in the spring?
Correct, computer gets: 127.5 J
7. [2pt]
The student gets off the bosun's chair very carelessly and all the
energy in the
spring is converted into the kinetic energy of the seat. The mass
of the seat is
1 kg. Once the spring has fully contracted, what is the speed of
the seat?
Answer:
8. [2pt]
Unfortunately, the student was hit on the head by the seat as it
flew up. Some of the kinetic energy of the seat will be converted
into
gravitational potential energy; neglect this. Assume the impact
speed of
the seat is the same as in the previous question. If the seat comes
to rest in 0.01 s as
it hits the student's head, what force would the seat exert on the
student's
head?
Be safe. Remember: get off the bosun's chair
carefully!
Answer:
I GOT QUESTION 6, BUT NOT 7 AND 8.
In: Physics
A long horizontal wire carries 26.0 A of current due north. The Earth's field 21.0 cm due west of the wire points north but downward, 44 ∘ below the horizontal, and has magnitude of 5.0×10−5T
What is the magnitude of the net magnetic field 21.0 cm due west of the wire?
What is the angle below the horizontal of the net magnetic field 21.0 cm due west of the wire?
In: Physics
8. Does the period of a simple pendulum depend on the amplitude of its motion? Explain.
In: Physics
a) A charge of 1C is affixed to the x axis at 20cm and a charge of 4C is affixed at -10cm, where must a charge of -10C be placed in order to have zero electrostatic force on it?
b) If instead, a charge of -3C is placed somewhere on the x-axis, where must it be placed so that the origin (0,0) will experience zero electric field?
Please include detailed NEAT explanation.
In: Physics
A sprinter accelerates at 3.08 m/s2 for a certain number of seconds during a 100.0 meter race. She runs the rest of the race at top speed and finishes the race in 10.59 s. What is her top speed?
In: Physics
A 890 g wooden block is initially at rest on a rough horizontal
surface when a 15.8 g bullet is fired horizontally into (but does
not go through) it. After the impact, the block-bullet combination
slides 6.50 m before coming to rest. If the coefficient of kinetic
friction between block and surface is 0.750, determine the speed of
the bullet immediately before impact.
(No Response) m/s
In: Physics
Ball 1, with a mass of 140 g and traveling at 13 m/s , collides head on with ball 2, which has a mass of 320 g and is initially at rest.
What is the final velocity of the ball 1 if the collision is perfectly elastic?
Express your answer in meters per second.
What is the final velocity of the ball 2 if the collision is perfectly elastic?
What is the final velocity of the ball 1 if the collision is perfectly inelastic?
What is the final velocity of the ball 2 if the collision is perfectly inelastic?
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A rocket is launched at an angle of 53.0° above the horizontal with an initial speed of 98 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile.
(a) Find the maximum altitude reached by the rocket.
(b) Find its total time of flight.
(c) Find its horizontal range.
In: Physics
For college physics. Please write in paragraph form, typed. Thanks!
Respond to the following:
In your own words, explain potential energy, kinetic energy, conservation of energy and examples in daily life.
In your own words, explain the definition of work in Physics.
In your own words, explain Hooke's Law and elastic potential energy.
In: Physics
| A football is kicked straight up into the air; it hits the ground 3.6 s later. |
Part A What was the greatest height reached by the ball? Assume it is kicked from ground level. Express your answer with the appropriate units.
SubmitRequest Answer Part B With what speed did it leave the kicker's foot? |
In: Physics
a) Explain and give a numerical example of time dilation.
b) Explain and give a numerical example of length contraction.
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A 2.9 kg block with a speed of 3.6 m/s collides with a 5.8 kg block that has a speed of 2.4 m/s in the same direction. After the collision, the 5.8 kg block is observed to be traveling in the original direction with a speed of 3.0 m/s. (a) What is the velocity of the 2.9 kg block immediately after the collision? (b) By how much does the total kinetic energy of the system of two blocks change because of the collision? (c) Suppose, instead, that the 5.8 kg block ends up with a speed of 4.8 m/s. What then is the change in the total kinetic energy?
In: Physics