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4 years ago

How many neutrons are present in an atom of iron-54? A) 26 B)28 C)30 D) 54

Physics

2 answers:

aleksklad [387]4 years ago

4 0

Answer:

Explanation:

olga_2 [115]4 years ago

4 0

Answer:

the answer is b

Explanation:

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Which of these statements describe friction? Check all that apply. Friction allows objects to slide over each other without any

devlian [24]

Since friction is something rubbing against each-other with resistance the answers would be... b, and e

3 0

3 years ago

Read 2 more answers

An aircraft, traveling northward, lands on a runway with a speed of 79 m/s. Once it touches down, it slows to 6.0 m/s over 785 m

Musya8 [376]

Answer:

$-3.95m/s^2$ , South

Explanation:

We are given that

Initial speed of aircraft,u=79 m/s

Final speed of aircraft,v=6 m/s

Distance,s=785 m

$v^2-u^2=2as$

Substitute the values

$(6)^2-(79)^2=2a(785)$

$36-6241=1570a$

$-6205=1570a$

$a=-\frac{6205}{1570}=-3.95m/s^2$

Where negative sign indicates that the direction of acceleration is opposite to direction of motion.

Therefore, the direction of acceleration is south.

5 0

4 years ago

Explain solar and lunar eclipse.with diagram.

Lunna [17]

Explanation:

an eclipse happens when one

astronomical body block light

from or to another, the moon moves into

the shadow of earth cast by sun... In a solar

eclipse, the moon passes between Earth

and the sun stops some all of the sun's light

from reaching Earth

4 0

3 years ago

Read 2 more answers

If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above a

Sever21 [200]

This is an incomplete question, here is a complete question.

The bulk modulus for bone is 15.0 (GPa). If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to compress her bones by 0.130% of their original volume?

Answer : The change in pressure will be, $1.95\times 10^7Pa$

Explanation : Given,

Bulk modulus = $15.0GPa=15.0\times 10^9Pa$

Change in volume = 0.130 % of original volume

Let the original volume be, V

So, Change in volume = $\frac{0.130}{100}\times V$

Formula used for change in pressure is:

$\Delta P=\beta \frac{\Delta V}{V}$

Now put all the given values in this formula, we get:

$\Delta P=(15.0\times 10^9Pa)\times \frac{(\frac{0.130}{100}\times V)}{V}$

$\Delta P=1.95\times 10^7Pa$

Thus, the change in pressure will be, $1.95\times 10^7Pa$

8 0

4 years ago

When Jacob bats a baseball with a net force of 4.719 N, it accelerates 33 m/s2. What is the mass of the baseball?

andreev551 [17]

Answer:

Mass=0.143 kg

Explanation:

From the Newton's second law of motion the force applied to an object is directly proportional to the acceleration produced and the acceleration is in the direction of the force.

F=ma where F is the force, m is the mass of the object and a i the acceleration.

m=F/a

=4.719N/33 m/s²

=0.143 kg

5 0

3 years ago