rutherford was the first to hypothesize that electrons orbit a positively charged nucleus a. true b.false

1 answer:

7 0

A) true; he performed experiments which showed that negatively-charged electrons orbited the positively-charged nucleus.

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Substances found in the food that the body needs

Marina CMI [18]

Answer:

There are six major nutrients: Carbohydrates (CHO), Lipids (fats), Proteins, Vitamins, Minerals, Water.

Explanation:

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Tom Sawyer runs 10 m/s down the dock and leaps on to his floating raft already moving 1.5 m/s away from shore. If Tom weighs 70

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Answer:

Not the right answer in the options, speed is 4.47 m/s, and the procedure is coherent with option A

Explanation:

Answer A uses mass and velocity units, which are momentum units. By using the conservation of momentum:

. $p_{initial} =p_{final} \\m_{Tom}*v_{Tom}+m_{raft}*v_{raft}=(m_{Tom}+m_{raft})*v_{both} \\70*10+130*1.5 kg*m/s=895kg*m/s\\v_{both}=\frac{895 kg*m/s}{200 kg} =4.47 m/s$

Since Tom stays in the raft, then both are moving with the same speed. From the options, the momentum is in agreement with option A, however, the question asks for speed.

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3 years ago

Which particle of the atom has a positive charge? A. proton B. electron C. nucleus D. neutron

mafiozo [28]

Two of these choices are correct. The nucleus of the atom has a positive charge, because of the positively charged protons in there.

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3 years ago

Light refracts when traveling from air into glass because light

ella [17]

Answer:

Speed of light changes

Explanation:

Since glass is denser than air so the speed of light in glass is less than in air so light rays bend i.e. refract.

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Two technicians are discussing a state emission test. Technician A says that a vent valve that is not able to close can cause th

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Answer: correct option is C

both Technicians A and B are right

Explanation:

Test cycles specify the specific conditions under which the engine or vehicle is operated during the emission test. The vent valve that is not able to close can cause the system to fail the on-board test. Also, a leaking gas cap can cause a failure of the EVAP test.

There are many different test cycles issued by various national and international governments and working groups

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