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Guest
PhysicsPhysics
What is the mass number of a potassium atom that has 20 neutrons
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Brendon
PhysicsPhysics
If an atom has a mass number of 23, which of the following is always true?

The number of protons in the nucleus does not equal the number of neutrons.

The atomic number is less than 11.

The atom is not an isotope.

The atom has an odd number of neutrons.
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Bugsey
PhysicsPhysics
What does the law of conservation of energy say
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Guest
PhysicsPhysics
How many elements are in the lanthanide series?
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Kayley Mahoney
PhysicsPhysics
Photon energy is proportional to which of the following. a. speed of light in a vacuum. B frequency of the light emitting the photon. C intensity of the light emmitting the photon. D wavelegnth of light emmitting thr photon.
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Alvin
PhysicsPhysics
Each half of earth surface is called
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Lewis
PhysicsPhysics
Explain how wavelength and frequency are important when determining the type of light.
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Macy
PhysicsPhysics
Suppose that you had an electrically charged stick. If you divided the stick in half, each half would have half the original charge. If you split each of these halves, each piece would have a quarter of the original charge. Can you keep on dividing the charge in this manner forever? If not, why not?
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Cullen Valenzuela
PhysicsPhysics
Technician a says that when measuring a rotor's thickness variation, you should measure the rotor in a minimum of five to eight places around the face of the rotor. technician b says that as long as the rotor faces look smooth after machining them, you don't have to measure them again. who is correct?
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Kyler Shaffer
PhysicsPhysics
What acceleration will you give to a 25kg box if you push it with a force of 85N
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Haley
PhysicsPhysics
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. assume that the rate of charge flow in a lightning bolt is about 24000 c/s and this lasts for 105 µs or less. how much charge flows between the ground and the cloud in this time?
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Mac
PhysicsPhysics
If F1 = 390 N and F2 = 550 N, determine the angle θ (0∘≤θ≤180∘) between them, so that the resultant force has a magnitude of FR = 780 N. Express your answer to two significant figures and include the appropriate units.
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Layne
PhysicsPhysics
How are Global winds and Local winds similar?
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Guest
PhysicsPhysics
A patient needs to take 375 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 375 mg dosage? Assume that these pills are scored and can be cut in half if necessary.
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Rene
PhysicsPhysics
How long would it take the Earth to complete 4 orbits around the Sun?
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