What direction does tangential velocity point?

Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Check all that apply

umka21 [38]

__Protons and neutrons have similar mass.

__Electrons are smaller than a proton or a neutron.

Explanation:

The three particles involved in this problem are:

Proton: it is positively charge, it is found in the nucleus of the atom, and its mass is $m_p = 1.67 \cdot 10^{-27} kg$
Neutron: it has no electric charge, it is also found in the nucleus of the atom, and its mass is approximately equal to that of the proton (just slightly larger)
Electron: it has negative electric charge, it orbit around the nucleus of the atom, and its mass is much smaller than that of the proton: $m_e = 9.11 \cdot 10^{-31} kg$

We can now analyze each of the given statement:

__Protons and neutrons have similar mass. --> TRUE

__Protons and electrons have similar mass. --> FALSE, the electron is much lighter

__Neutrons and electrons have similar mass. --> FALSE, the neutron is much heavier

__Protons are smaller than a neutron or an electron. --> FALSE, protons are similar to the neutrons

__Neutrons are smaller than a proton or an electron. --> FALSE, neutrons are similar to the protons

__Electrons are smaller than a proton or a neutron. --> TRUE

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3 0

3 years ago

Read 2 more answers

Velocity (m/s)

alekssr [168]

Explanation:

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(a) The segment A shows acceleration as velocity increases with the increase in time.

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(b) The segment C shows the object is slowing down as the time increases in segment C, the velocity decreases and afterwards it comes to rest.

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(c) The velocity is segment B is 40m/s. And in the diagram there is no change in velocity.

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(d) The acceleration of segment B is zero. As there in no change in curve and it is moving with uniform velocity.

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<h2>Thank you!</h2>

3 0

2 years ago

what is the density of a substance that has a mass of 2.0 g , and when placed in a graduated cylinder the volume changed from 70

lubasha [3.4K]

A material with a mass of 2.0 g when placed in a graduated cylinder the volume changed from 70 ml to 75 ml has a density of 0.4 g/mL.

How do I calculate the substance's density?

We'll start by getting the substance's volume. This is attainable as follows:

Water volume: 70 mL

75 mL = volume of material + water.

Substance volume =?

Substance volume equals (substance volume plus water) - (Volume of water)

Substance volume = 75 - 70

5 mL is the substance's volume.

Finally, we will calculate the substance's density. Below is an example to help:

2.0 g is the substance's mass.

5 mL is the substance's volume.

Substance density =?

Mass / volume equals density.

Substance density = 2/5

0.4 g/mL is the substance's density.

The density is therefore 0.4 g/mL.

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6 0

1 year ago

Which part of a laser printer applies a positive charge to the paper that attracts the toner particles to it

Shalnov [3]

The part of laser printer that applies a positive charge to the paper in order to attract the toner particles is known as transfer roller.

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What is a laser printer:

A laser printer is a kind of printer that uses the electrostatic digital printing process to perform printing. It makes use of the static electricity and toner powder in place of liquid ink.

The toner is applied to specific areas which are dependent on the charge difference created or on the static electricity.

Following are the components of a laser printer:

Scanning unit:

This unit of a laser printer generally consists of a laser diode, a

scanning motor and a polygon mirror.
It also consists of two-beam alignment lenses.

Cartridge unit:

This unit of laser printer consists of three drums, namely primary

charging roller (PCR), organic photoconductive drum (OPC) , and

image transfer roller (ITR).
The transfer roller is also present at a close vicinity of the

printer's toner cartridge.

Fuser assembly unit:

This unit of laser printer consists of a pressure roller and a fuser roller, where the fuser roller assembly consists of a heating

element.

Therefore, the transfer roller unit of a laser printer applies a positive charge to the paper that attracts the toner particles to it.

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6 0

2 years ago

Plz plz answer quick...

Kruka [31]

I think it would increase because the lynx is a predator of the snowhare

3 0

3 years ago