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Ellis Shepard
Physics
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 535 nm? The index of refraction of the film is 1.32, and there is air on both sides of the film.
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Xzavier Humphrey
Physics
Water Cycle
1. True or False:
The earth always has the same amount of water because it
is constantly forming more water AND losing water at
similar rates.
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Frye
Physics
What are physical properties?
A. The difference between a substance and a mixture
B. The difference between a heterogeneous and a homogeneous mixture
C. Characteristics used to tell the difference between matter
D. Properties that can change the chemical composition of matter
(APEX)
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Cristopher Kaiser
Physics
If an astronaut goes on a space walk outside the Space Station, she will quickly float away from the station unless she has a tether holding her to the station. Part A Choose the correct explanation why does the statement make sense (or is clearly true) or does not make sense (or is clearly false). Choose the correct explanation why does the statement make sense (or is clearly true) or does not make sense (or is clearly false).
a. This statement is true. She and the Space Station have different orbits at the beginning and will move apart.
b. This statement is true. She and the Space Station cannot share the same orbit and will move apart quickly.
c. This statement is false. She and the Space Station have different orbits at the beginning but will stay together due to mutual gravity.
d. This statement is false. She and the Space Station share the same orbit and will stay together unless they are pushed apart.
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Yukon
Physics
6. If a car went a distance of 225 kilometers in 4
hours, what is the speed of the car?
a 56.25 km/h
b. 900 km/h
c. 450 km/h
d. 0.0178 km/h
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Madeleine Carney
Physics
In which city rusting is a problem delhi or mumbai
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Dallas Crane
Physics
Juan measured the temperature of salt water. He then added 273 to the measured value. Which conversion is Juan m
likely doing?
degrees Celsius to degrees Fahrenheit
degrees Celsius to kelvins
kelvins to degrees Celsius
degrees Fahrenheit to degrees Celsius
Mark this and return
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Gemma Collins
Physics
A baseball has a mass of 0.45 kg and is thrown with a speed of 25 m/s. what is the momentum of the baseball?
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Avery
Physics
Two boxes hang from a solid disk pulley that is free to rotate as the blocks rise/fall.
The left box has a mass m1 = 4.3 kg and the right box has a mass m2 = 2.1 kg. The pulley has mass m3 = 2.5 kg and radius R = 0.15 m. 1)
1) What is the linear acceleration of the left box? (up is the positive direction) m/s2
2) What is the angular acceleration of the pulley? (let counter-clockwise be positive) rad/s2
3) What is the tension in the string between the left mass and the pulley? N
4) What is the tension in the string between the right mass and the pulley? N
5) The boxes accelerate for a time t = 1.51 s. What distance does each box move in the time 1.51 s? m
6) What is the magnitude of the velocity of the boxes after the time 1.51 s? m/s
7) What is the magnitude of the final angular speed of the pulley? rad/s
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Frida Riggs
Physics
If your weight is force created by gravity on your body, and therefore is the Earth pulling you down, what is the reaction force?
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Demarion Arias
Physics
If an object is moving with a velocity of 24 m/s and has an acceleration of - 4m/s2,
how long will it take it to stop?
A.-6s
B. 6s
C.-96 s
D. 20s
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Jaydan Stout
Physics
How does the growth of organisms get affected by environmental and genetic factors?
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Guest
Physics
A rubber ball with mass 0.20 kg is dropped vertically from a height of 1.5 m above a floor. The ball bounces off of the floor, and during the bounce 0.60 J of energy is dissipated. What is the maximum height of the ball after the bounce
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Baylee Stanton
Physics
Which of the following are NOT properties of bases?
Check all that apply.
A. Reacts with certain metals
B. Slippery
C. Tastes Bitter
D. Reacts with baking soda to produce carbon dioxide
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Cole Snyder
Physics
What is the electric force between a glass ball that has 2.5 uc charge and a rubber ball that has a - 1.5 uc charge when they are separated by a distance of 5.0 cm
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