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Physics
Physics
High School
five time constants are required to fully charge or discharge a capacitor. group of answer choices true false
Physics
High School
A stove burner applies 9000J of thermal energy to a system causing an increase of 6000J. What happened to the other 3000?
Physics
High School
a softball player leaves the batter's box, overruns first base by 3.0 meters, and then returns to first base. compared to the total distance traveled by the player, the magnitude of the player's total displacement from the batter's box is
Physics
High School
planet x has a mass of m and a radius of r. planet y has a mass of 3m and a radius of 3r. identical satellites orbit both planets at a distance r above their surfaces, as shown above. the planets are separated by such a large distance that the gravitational forces between them are negligible. question how does the gravitational field gx at the surface of planet x compare with the gravitational field gy at the surface of planet y?
Physics
High School
Large stars can explode as they finish burning their nuclear fuel, causing a supernova. the explosion blows away the outer layers of the star. according to newtons third law, the forces that push the outer layers away have reaction forces that are inwardly directed on the core of the star. these forces compress the core and can cause the core to undergo a gravitational collapse. the gravitational forces keep pulling all the matter together tighter and tighter, crushing atoms out of existence. under these extreme conditions, a proton and an electron can be squeezed together to form a neutron. if the collapse is halted when the neutrons all come into contact with each other, the result is an object called a neutron star, an entire star consisting of solid nuclear matter. many neutron stars rotate about their axis with a period of 1s and, as they do so, send out a pulse of electromagnetic waves once a second. these stars were discovered in the 1960s and are called pulsars.What is the speed of a point on the equator of the star?
Physics
High School
In order to gather warmth, alligators can often be found lying on the grassy banks of lakes during the daylight hours to regulate their body temperature. How is heat transferred to the alligator?.
Physics
High School
8. A skydiver, with a weight on Earth of 1470 N, jumps on a foreign planet and after 5 seconds the net force acting an him is 600 N downward as he encounters an alien air resistance of 300 N. What is gravity on this alien planet?
Physics
High School
A ball rolls without slipping down incline a, starting from rest. At the same time, a box starts from rest and slides down incline b, which is identical to incline a except that it is frictionless. Which arrives at the bottom first?.
Physics
High School
When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 ev. What is the maximum kinetic energy of the photoelectrons when light of wavelength 300.0 nm falls on the same surface?
Physics
High School
The electron configuration for an atom is 1 s 2 2 s 2 2 p 2. How many electrons does the atom have?.
Physics
Middle School
Calling all physics geniuses! An object is placed 20cm in front of a convex lens whose focal length is 12cm. What type of image is formed?Super helpful if you could answer in terms of inverted/upright/magnified/diminished/real/virtual...etc.
Physics
High School
A 8.0-m long wire with a mass of 10 g is under tension. a transverse wave for which the frequency is 570 hz, the wavelength is 0.10 m, and the amplitude is 3.7 mm is propagating on the wire. the maximum transverse acceleration of a point on a wire is closest to:_______.
Physics
High School
how does the gravitational field gx at the surface of planet x compare with the gravitational field gy at the surface of planet y?
Physics
College
The following images show four identical Sun-like stars and their companion planets, all traveling in circular orbits. In each case, the mass of the planet is given in Jupiter masses and the orbital distance is given in Astronomical Units (AU), Rank each case based on the strength of the gravitational force exerted by the extrasolar planet on its contrastar, from weakest to strongest if you think that two or more) diagrams should be ranked as equal, drag one on top of the others to show this equality (Not to scale) View Available Hints) Reet Help One Jupiter Mass Four Supiter Masse 20 One Jupiter Mas Tho Supiter Hasses Weakest Strongest
Physics
High School
in a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 105.0 mhz in opposite directions inside a narrow cavity with reflectors at both ends, causing a standing wave pattern to occur. part a how far apart are the nodal planes of the magnetic field? express your answer in meters. templatessymbols undoredoresetkeyboard shortcutshelp nothing m request answer part b if the standing wave pattern is determined to be in its eighth harmonic, how long is the cavity?
Physics
High School
If a hydrogen atom were enlarged to be 2 mi wide, what size would the single proton in its nucleus be?About the size of a city blockAbout the size of a stadiumAbout the size of a golf ball
Physics
High School
in an l-r-c series circuit, the rms voltage across the resistor is 30.0 v, across the capacitor it is 90.0 v, and across the inductor it is 55.0 v. what is the rms voltage of the source?
Physics
High School
which electromagnetic radiation wavelength is efficiently observed using ground based telescopes?
Physics
High School
Based on what you know about how fossils are created, rank the following organisms based on the likelihood that they would be preserved in the fossil record.1. Jellyfish2. Plant Leaf3. Coyote4. Fish5. Clam
Physics
High School
at the moment a roller coaster reaches the bottom of its loop, in what direction is the centripetal acceleration pointed?
Physics
High School
How does the wavelength of infrared compared with the wavelength of?
Physics
College
The books on the bottom shelf experience more gravity than the books on top, because they are closer to the ground.A TrueB False
Physics
College
sirius looks brighter than alpha centauri, but we know that alpha centauri is closer because its apparent position in the sky shifts by a larger amount as earth orbits the sun
Physics
College
to conduct category 1 operations over people, the small unmanned aircraft: [source: ac-107-2, small unmanned aircraft systems (small uas) (as amended)]
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