Physics, 15.09.2021 05:20 freshysans4
An atom has at least one positive proton and at least one negative electron. Which of the following is true about the protons and electrons in an atom? A. Protons and electrons are mixed together in a cloud. B. Protons and electrons orbit close together around a central nucleus. C. Protons and electrons are stuck together in neutral pairs. D. Protons and electrons are far apart with lots of empty space in between.
Answers: 3
Physics, 21.06.2019 17:50
Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.
Answers: 3
Physics, 22.06.2019 12:10
Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?
Answers: 2
Physics, 22.06.2019 14:00
How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c
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Physics, 22.06.2019 16:30
In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.
Answers: 3
An atom has at least one positive proton and at least one negative electron. Which of the following...
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