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3 years ago

45 points PLEASE HELP ME!!!! Describe Rutherford's contribution to the atomic model

2 answers:

7 0

Rutherford was the first person to make a model of an atom that was mostly accurate, the only thing is in his early model there were electrons and protons, at this time Rutherford did not know of a neutron and was not discovered until 1932.<span />

Lostsunrise [7]3 years ago

3 0

Rutherford (1871–1937) was responsible for a remarkable series of discoveries in the physics, especially in the atomic model.

He identified the atomic nuclei - a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom.

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6. A garden hose attached to a nozzle is used to fill a 15-gal bucket. The inner diameter of the hose is 1.5 cm, and it reduces

Vesna [10]

Answer: 1.135 L/s; 1.35 kg/s, 22.57 m/s

Explanation:

Given

Volume of bucket $V=15\ gal\approx 56.78\ L$

time to fill it $t=50\ s$

Volume flow rate

$\dot{V}=\dfrac{56.78}{50}=1.135\ L/s\approx 1.135\times 10^{-3}\ m^3/s$

The inner diameter of the hose $D=1.5\ cm$

diameter of the nozzle exit $d=0.8\ cm$

we can volume flow rate as

$\Rightarrow \dot{V}=Av\quad \quad \text{v=average velocity through nozzle exit}\\\\\Rightarrow 1.135\times 10^{-3}=\frac{\pi }{4}d^2\times v\\\\\Rightarrow 1.135\times 10^{-3}=\frac{\pi }{4}(0.8\times 10^{-2})^2\times v\\\\\Rightarrow v=\dfrac{4\times 1.135\times 10^{-3}}{\pi \times 64\times 10^{-6}}=22.57\ m/s$

Mass flow rate

$\Rightarrow \dot{m}=\rho \times \dot{V}\\\Rightarrow \dot{m}=1\ kg/L\times 1.135\ L/s=1.35\ kg/s$

5 0

3 years ago

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecu

AfilCa [17]

Answer:

Explanation:

The first law of thermodynamics states that:

$\Delta U = Q-W$

where

U is the internal energy of the gas, which represents the sum of the chemical and thermal energy stored in the atoms and molecules of the gas

$\Delta U$ represents the variation of internal energy

Q is the heat absorbed by the system

W is the work done by the system

So, the sum of the chemical and thermal energy stored in atoms and molecules is represented by U, the internal energy.

8 0

3 years ago

Read 2 more answers

which of the laws of motion states to every action there is an equal but opposite reaction letter a Newton's first law see Newto

nataly862011 [7]

Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

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3 years ago

Which sentence most likely explains why the rock has large open pores

hoa [83]

ur answer is C) Bubbles formed in the magma when it was still in liquid form.

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3 years ago

The speed of a car is 40m/s after 10 sec suddenly there was a crowd and the driver reduces its speed to 20m/s. What is the decel

aliya0001 [1]

Explanation:

the number 0.4 in P4 from east

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3 years ago