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3 years ago

14

In some states the highway patrol uses planes carrying radar devices to monitor traffic. As the plane files over traffic, the ra

dar device can tell the officers how fast each car is moving at that moment in time. The radar determines the cars

1 answer:

MatroZZZ [7]3 years ago

4 0

The answer is Instantaneous speed

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If an electron moves in a circle of radius 21 cm perpendicular to a B field of 0.4 T, what are the speed of the electron and the

kodGreya [7K]

Answer:

a)

$v = 4.048 *10^6$ m/s

b)

Angular frequency = $1.92 * 10^7$

Explanation:

As we know

$v = \frac{qBr}{m}$

q is the charge on the electron = $3.2 * 10^{-19}$ C

B is the magnetic field in Tesla = $0.4$ T

r is the radius of the circle = $0.21$ m

mass of the electrons = $6.64 * 10^{-27}$ Kg

a)

Substituting the given values in above equation, we get -

$v = \frac{3.2 * 10^{-19}*0.4*0.21}{6.64 * 10^{-27}} \\v = 4.048 *10^6$ m/s

b)

Angular frequency =

$\frac{4.048 * 10^6 }{0.21} \\1.92 * 10^7$

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2 years ago

What part of an atom bonds with other atoms? ? A the innermost electrons B valence electronsany C the outermost protons D any el

kaheart [24]

Ionic bonds occur when electrons are donated from one atom to another. Each type of atom forms a characteristic number of covalentbonds with other atoms. An example of that is a hydrogen atom with one electron in its outer shell forms only one bond, its out most orbital becomes filled with two electrons.
the outermost protons

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3 years ago

Whar are codes of behavior in the gym that should be followed

Sunny_sXe [5.5K]

Answer: Always ask. ...

Put your weights back. ...

Be mindful of your surroundings. ...

Bring a towel. ...

Clean up after yourself (and, if you have to, other patrons). ...

Selfies: Try to be discreet about them. ...

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3 years ago

CN you help me with this question?

qaws [65]

25% i believe because if were talking 50 percent half it would be 25.

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2 years ago

In the reaction at Blood Falls, iron and oxygen combine to form iron oxide, which is called rust (water is also present). The re

uranmaximum [27]

Reactant is<span> a substance that is in a chemical </span>reaction<span>. Product is a substance that is produced by the chemical </span>reaction. A chemical change that you are familiar with isrust<span>. In this chemical </span>reaction<span>, </span>oxygen<span> and </span>iron<span>, which are the </span>reactants,combine to form<span> a product called </span>iron oxide(rust<span>)
(Mark me as brainiest, vote, and give thanks! Trying to rank up!)</span>

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2 years ago

Read 2 more answers