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3 years ago

What are alkaline earth metals used for?

Physics

2 answers:

Tomtit [17]3 years ago

6 0

Answer:

C firework

Explanation:

from Quizlet

Makovka662 [10]3 years ago

4 0

The answer is C. Fireworks

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Across what potential difference does an electron have to be accelerated in order to reach the speed v=3e7 m/s?

zmey [24]

When an electron is accelerated through potential difference then the speed that it attain will be explained by energy conservation

here by energy conservation we can say that

change in kinetic energy of electron = electrostatic potential energy gained through given potential difference

kinetic energy is given as

$KE = \frac{1}{2}mv^2$

electrostatic potential energy is given as

$PE = qV$

now by energy conservation

$qV = \frac{1}{2}mv^2$

given that for electron

$m = 9.1 * 10^{-31} kg$

$v = 3 * 10^7 m/s$

$q = 1.6 * 10^{-19} C$

now by plug in values

$1.6 * 10^{-19} * V = \frac{1}{2}*9.1* 10^{-31} *(3*10^7)^2$

$V = \frac{4.095 * 10^{-16}}{1.6 * 10^{-19}}$

$V = 2559.4 Volts$

So here it is accelerated through potential difference of 2559.4 Volts

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3 years ago

Help meeeeeeeeeeee<br>what is the rheostat and what its ruleeee??

oee [108]

Answer:

A rheostat is a variable resistor which is used to control current. They are able to vary the resistance in a circuit without interruption. ... It uses only two connections, even when 3 terminals (as in a potentiometer) are present.

Explanation:

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3 years ago

What is a newton equal to in terms of units of mass and acceleration?

Dimas [21]

1 newton =
the force that accelerates 1 kilogram of mass at the rate of 1meter per sec²

1 N = 1 kg-m/s²

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4 years ago

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Consider two mass-less springs connected in series. Spring 1 has a spring constant k₁, and spring 2 has a spring constant k₂. A

olga2289 [7]

Explanation:

Below is an attachment containing the solution.

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3 years ago

Can someone please help me it's urgent!

Alik [6]

Answer:

It's the first one

Explanation for answer:

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3 years ago

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