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Everett Hurst
Physics
An unusual fog that is denser than air begins to fill a room should the people in the room walk out or crawl out
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Brynn
Physics
A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music is 83.9 dB at a distance of 6.91 m from the door. At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m.
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Jimena Carson
Physics
An element's atomic number is 45. How many protons would an atom of this element have?
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Yaretzi Osborn
Physics
Which of earth's spheres do mountains, lakes, trees, clouds, ice, and snow represent? (which sphere does each one belong in?) ?
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Leroy Arroyo
Physics
Finish this sentence to describe whar happens ro potential energy: as the height of an object increases
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Dana
Physics
Where does the energy in the ecosystem start?
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Kael Little
Physics
At a fabrication plant, a hot metal forging has a mass of 75 kg and a specific heat
capacity of 430 J / (kg? C°). To harden it, the forging is immersed in 710 kg of oil that has
a temperature of 32 °C and a specific heat capacity of 2700 J / (kg? C°). The final
temperature of the oil and forging at thermal equilibrium is 47 °C. Assuming that heat
flows only between the forging and the oil, determine the initial temperature of the
forging.
(5)
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Adelyn Contreras
Physics
gaseous h2 and br2 are added to an evacuated 1.15L container kept at 298K. The intial partial pressurre of H2 (g) is 0.782 atm and that of Br2 (g) is 0.493 atm. Find the partial pressures of HBr when the system reaches equilibrium
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Deborah
Physics
Andrea asked her brother to take a 4 ft floating raft out of the water near the wave-swept shore. Using this raft as a measuring tool, she estimated that the wavelengths of these particular ocean waves were about 11 ft.
How fast are these surface ocean waves if the frequency remains 16 Hz?
Answer in units of ft/s.
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Brandon Cooley
Physics
1kg of gold will have seven times the volume of 1kg of aluminium? True/False
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Emilia Kidd
Physics
A soccer player kicks the ball toward a goal that is 16.8 m in front of him. The ball leaves his foot at a speed of 16.0 m/s and an angle of 28.08 above the ground. Find the speed of the ball when the goalie catches it in front of the net.
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Nathanial Byrd
Physics
2. Two identical conducting spheres are placed with their centers 0.30 m apart. One is given a charge of 12 x 10-9 C and the other is given a charge of - 18 x 10-9 C. a. Find the electric force exerted on one sphere by the other. b. The spheres are connected by a conducting wire. After equilibrium has occurred, find the electric force between the two spheres.
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Mulligan
Physics
According to Archimedes principle, if an object s weight is greater than the weight of the fluid displaced, the object will float? True or false?
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Raegan
Physics
A drop of blood is discovered at a crime scene. In order to determine if it is human blood, the forensic investigator performed the precipitin test using "anti-human antibodies from a rabbit. The sample coagulates. What origin is the sample from?
a) cat
b) dog
c) human
d) rabbit
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Mejia
Physics
How much power should a braked 1.5t car have to be braked to reduce its speed from 30m / s to 10m / s in 5s?
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