3 years ago

What is radioactivity????

1 answer:

5 0

Radioactivity is a nuclear phenomenon. It is the process of spontaneous emission of α (alpha particles) or β (beta particles) and γ (gamma particles ) radiations from the nucleus of atoms during their decay.

Uranium and radium are the two radioactive substances.

Explanation:

<h3>Hope it helps you!!</h3>

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Blababa [14]

When a liquid or a gas is heated, it expands and becomes less dense, so it rises, while the cooler, denser liquid or gas sinks. (Not sure if this helps but this is what I hit)

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3 years ago

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What is the dimension of resistivity

Alexandra [31]

Answer:

Are you looking for the formula? because if so:

M L^2 T^-3 I^-2

Explanation:

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3 years ago

An inductor is connected to an AC power supply having a maximum output voltage of 3.00 V at a frequency of 280 Hz. What inductan

Sergio [31]

Answer:

L = 0.48 H

Explanation:

let L be the inductance, Irms be the rms current, Vrms be the rms voltage and Vmax be the maximum voltage and XL be the be the reactance of the inductor.

Vrms = Vmax/(√2)

= (3.00)/(√2)

= 2.121 V

then:

XL = Vrms/I

= (2.121)/(2.50×10^-3)

= 848.528 V/A

that is L = XL/(2×π×f)

= (848.528)/(2×π×(280))

= 0.482 H

Therefore, the inductance needed to kepp the rms current less than 2.50mA is 0.482 H.

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3 years ago

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allsm [11]

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3 years ago

A truck’s suspension spring each have a spring constant of 769 N/m. If the potential energy of the right front spring is 250 J,

Alex Ar [27]

Answer:

x = 0.81 m

Explanation:

given,

spring constant, k = 769 N/m

Potential energy of the spring = 250 J

distance of spring compression = ?

using conservation of energy

potential energy will equal to the spring energy

$PE = \dfrac{1}{2}kx^2$

$250= \dfrac{1}{2}\times 769\times x^2$

x² = 0.650

x = 0.81 m

Hence, the spring is compressed to 0.81 m

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3 years ago

What is radioactivity????​

What is radioactivity????