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3 years ago

Neutral atoms of a specific element can have different numbers of which of the following?

Physics

2 answers:

torisob [31]3 years ago

7 0

Answer there answer is neutrons

Explanation:

Ksenya-84 [330]3 years ago

5 0

Isotopes of an element have different number of neutrons.

The answer is B
Hope it helps!

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Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, the repulsive force b

sdas [7]

Answer:

Explanation:

Case I: They have same charge.

Charge on each sphere = q

Distance between them, d = 14.8 cm = 0.148 m

Repulsive force, F = 0.235 N

Use Coulomb's law in electrostatics

$F=\frac{Kq_{1}q_{2}}{d^{2}}$

By substituting the values

$0.235=\frac{9\times10^{9}q^{2}}{0.148^{2}}$

$q=7.56\times10^{-7}C$

Thus, the charge on each sphere is $q=7.56\times10^{-7}C$ .

Case II:

Charge on first sphere = 4q

Charge on second sphere = q

distance between them, d = 0.148 m

Force between them, F = 0.235 N

Use Coulomb's law in electrostatics

$F=\frac{Kq_{1}q_{2}}{d^{2}}$

By substituting the values

$0.235=\frac{9\times 10^{9}\times 4q^{2}}{0.148^{2}}$

$q=3.78\times10^{-7}C$

Thus, the charge on second sphere is $q=3.78\times10^{-7}C$ and the charge on first sphere is $4q = 4\times 3.78\times 10^{-7}=1.51 \times 10^{-6} C$ .

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4 years ago

How could rescue workers use squeezing or compressing to get energy to their flashlights during rescue missions?

Neko [114]

Answer:

Explanation:

During rescue missions, different types of energy can be devices for flashlight, this could be human powered energy such as squeezing or compressing. In flashlight electrical energy is converted to light and thermal energy.

A squeezing or compressing to get energy for flashlight can be regarded as "DYNAMO PROCESS" it involves spinning of "fly wheels" into the flashlight through consistent squeezing ,which is connected to a dynamo(Dynamo supply electrical current). Hence the needed light is seen on the bulb of the flashlight.

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3 years ago

You volunteer for chalkboard cleaning duty and you get to work with the erasers. As you rub the dust off of the chalkboard, whit

Anna71 [15]

Answer:

A physical change

Explanation:

You are wiping chalk particles from the board to the eraser which is just changing the location of the chalk particles, a physical change.

you're not changing the chalk into a new substance or causing a chemical reaction, which would be a chemical change.

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4 years ago

The _____ force is the sum of all the forces that act upon an object.

Sauron [17]

In many physical situations, an object will be subject to many different forces such as gravity, friction or an external force. Finding the sum of these forces ultimately indicates if the object will move and in what direction it will move in. The sum of all forces that act upon an object is known as the net force. It can be found by simply adding individual force vectors together.

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3 years ago

Read 2 more answers

Please answer quick!!

raketka [301]

Answer:

Explanation:

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3 years ago