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2 years ago

1. Given an element's atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus?

Physics

2 answers:

DanielleElmas [232]2 years ago

8 0

C. Number of protons = atomic number; number of neutrons = mass number - atomic number

tatiyna2 years ago

6 0

Answer:

last one. c

Explanation:

atomic number; number of neutrons = mass number - atomic number is the very important to find the number of the question.

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How many mL of water would be displaced by 408 g of lead

Natasha2012 [34]

For this, we must know the density of lead. This is 11.36 grams per cubic centimeter. The mass present is 408 grams. Therefore, the volume occupied will be:
408 / 11.36 = 35.9 cubic centimeters. This is the volume of water that will be displaced.
Now, we know that one cubic centimeter is equivalent to one mL. Therefore,
35.9 ml of water will be displaced.

6 0

3 years ago

Starting from zero, an electric current is established in a circuit made of a battery of emf E, a resistor of resistance R and a

igor_vitrenko [27]

Answer:

time constant will decrease and steady state current will decrease on increasing the resistance

Explanation:

As we know that the EMF of cell is E which is used to connected across a resistor and an inductor.

So we will have

$E - iR - L\frac{di}{dt} = 0$

here we know that

$i = \frac{E}{R}(1 - e^{-Rt/L})$

now here we have

$\tau = \frac{L}{R}$

so if we increase the value of resistance of the wire then the time constant will decrease

and hence it will take less time to reach near the steady state value

also the steady state current will be smaller in that case

8 0

3 years ago

A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60

Bumek [7]

Answer:

1.2cm

Explanation:

V=(2ev/m)^1/2

=(2*1.6*10^19 x2500/ 1.67*10^27)^1/2

=6.2x10^5m/s

Radius of resulting path= MV/qB

= 1.67*10^-27x6.92*10^6/1.6*10^-16 x0.6

=0.012m

=1.2cm

5 0

3 years ago

Read 2 more answers

What is the importance of measurement? <br>

Kruka [31]

Answer:

To know the time ,length area

8 0

3 years ago

A charged particle is located in an electric field where the magnitude of the electric field strength is 2.0x10^3 newtons per co

Alexxandr [17]

Answer:

20.7

Explanation:

:0 because basis of the daily occured

6 0

2 years ago