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3 years ago

Name the particle in the nucleus of an atom that gives the nucleus a positive charge

Physics

2 answers:

Crazy boy [7]3 years ago

8 0

The answer is d...............

monitta3 years ago

8 0

A) proton

This is simply a matter of actually learning the terms. To wit
A) proton - One of two different particles found in the nucleus of an atom. They have about the same mass as a neutron, and have a positive charge.

B) photon - The basic unit of light.

C) neutron - The other particle found in the nucleus of an atom. They have no electrical charge and are about the same mass as a proton.

D) electron - The particle that "orbits" the nucleus of an atom. They're much lighter than either protons or neutrons, and have a negative charge.

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The angular momentum of a flywheel having a rotational inertia of 0.140 kg ·m2 about its central axis decreases from 3.00 to 0.8

Rasek [7]

Answer

given,

I = 0.140 kg ·m²

decrease from 3.00 to 0.800 kg ·m²/s in 1.50 s.

a) $\tau = \dfrac{\Delta L}{\Delta t}$

$\tau = \dfrac{0.8-3}{1.5}$

τ = -1.467 N m

b) angle at which fly wheel will turn

$\theta= \omega t +\dfrac{1}{2}\alpha t^2$

$\theta= \dfrac{L}{I} t +\dfrac{1}{2}\dfrac{\tau}{I}t^2$

$\theta= \dfrac{3}{0.14}\times 1.5+\dfrac{1}{2}\dfrac{-1.467}{0.14}\times 1.5^2$

θ = 20.35 rad

c) work done on the wheel

W = τ x θ

W = -1.467 x 20.35 rad

W = -29.86 J

d) average power of wheel

$P_{av} =-\dfrac{W}{t}$

$P_{av} =-\dfrac{(-29.86)}{1.5}$

$P_{av} =19.91\ W$

7 0

3 years ago

Read 2 more answers

A centrifuge in a medical laboratory rotates at an angular speed of 3,500 rev/min, clockwise (when viewed from above). When swit

Ratling [72]

Answer:

The magnitude of angular acceleration is $232.38\ rad/s^2$ .

Explanation:

Given that,

Initial angular velocity, $\omega_i=3500\ rev/min=366.5\ rad/s$

When it switched off, it comes o rest, $\omega_f=0$

Number of revolution, $\theta=46=289.02\ rad$

We need to find the magnitude of angular acceleration. It can be calculated using third equation of rotational kinematics as :

$\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{-(366.51)^2}{2\times 289.02}\\\\\alpha =-232.38\ rad/s^2$

So, the magnitude of angular acceleration is $232.38\ rad/s^2$ . Hence, this is the required solution.

6 0

3 years ago

What is the energy in space left over from the big bang called

Lilit [14]

It is called the CMBR, which stands for cosmic microwave background radiation. It was discovered by Arno Penzias and Robert Wilson in 1964.

5 0

3 years ago

How is the atmospheric pressure detected. plsss help...

andrezito [222]

Answer:

Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes. Meteorologists describe the atmospheric pressure by how high the mercury rises.

Explanation:

Hope it helps you

have a nice day

6 0

2 years ago

How are rocks weathered as in this example seen here?A) The rocks change their composition. B) The rocks are being chemically we

Vladimir79 [104]

Answer:

Is there a picture-

Explanation:

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3 years ago