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Aaliyah Sanders
Physics
Which of the following diagnostic procedures uses ultrasound?
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Woodard
Physics
Why is it easier to read black text on a white background than to read green text of any light color?
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Willow Mcknight
Physics
If object A has more mass than object B, does object A contain more matter? Explain.
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Emilia Wong
Physics
Describe a beach that was near stormy seas and powerful waves
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Villarreal
Physics
We all depend on electricity. Most electricity is created by electromagnetic generators at large power plants and distributed through an electric grid. The electric grid in the United States is interconnected and includes more than 400,000 miles of electric transmission lines. However, the grid has not been well maintained, and the number and severity of power outages has been rising over the past decade. Because the grid is interconnected, a severe power outage in one area can quickly spread to other areas.
How long could you survive without electricity? What parts of your life would be affected by loss of electricity? Should you prepare for an electricity outage, and if so, how would you prepare? What backup system could your family or community install to generate limited amounts of electricity during an outage? How does this system create an electric force field and generate electric current?
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Hugh Lucas
Physics
A rock with mass m = 4.00 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 17.4 N (a combination of gravity and the buoyant force exerted by the medium) and by a fluid resistance force f=kv, where v is the speed in m/s and k = 2.16 N*s/m.
a. Find the initial acceleration a0.
b. Find the acceleration when the speed is 3.00 m/s.
c. Find the speed when the acceleration equals 0.1 a0.
d. Find the terminal speed vt.
e. Find the coordinate, speed, and acceleration 2.00 s after the start of the motion.
f. Find the time required to reach a speed of 0.9 Vt.
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Sport
Physics
On arrival at a vehicle collision, you observe a small fire in the engine compartment. A bystander is attempting to smother the fire with a jacket as you approach with an A-B-C extinguisher from your ambulance. Which of the following is the BEST method of extinguishing the fire?
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Luna Khan
Physics
Gertrude writes a short story in which the main character must enter a nuclear-powered spaceship's engine room that has lost its shielding in order to prevent the engine from flooding the rest of the ship with radiation. The main character is not wearing protective gear. What effects are best for Gertrude to consider when planning what may happen to the character? non-stochastic effects such as possible DNA mutations later in life resulting from the short-term, high-level exposure non-stochastic effects such as severe burns and radiation sickness resulting from the short-term, high-level exposure stochastic effects such as possible DNA mutations that are unlikely to occur from the single, low-level exposure stochastic effects such as severe burns and radiation sickness resulting from the long-term, low-level exposure
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Lane Willis
Physics
PV = nRT, is the a. equation of state of an ideal gas
b. theorem of equipartition of energy
c. second law of thermodynamics
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Amara Porter
Physics
Which conducting electricity has the most harmful effects?
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Jack Serrano
Physics
Which is the farthest known planet from the sun?
a. Jupiter
b. Saturn
c. Uranus
d. Neptune
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Liberty Newman
Physics
Laser light of wavelength 470 nm shines on a pair of slits at normal incidence, producing a pattern of maxima on a large screen 92.0 cm away from the slits. The second order maximum is observed to be 31.7 cm away from the central maximum.
a. Find the angle at which this second maximum is seen.
b. Determine the spacing between the slits.
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Brandon Weaver
Physics
What does the slope of a line of best fit represent
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Kinley Lowery
Physics
A bowling ball is pushed with a force of 22.0N and accerlates at 5.5 m/s square. What is the mass of the bowling ball
A - 4.0 kg
B-0.25 kg
C-25 kg
D-4.00 kg
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Melissa Hill
Physics
How to eat butter. I want to know how you all eat the butter.
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