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4 years ago

How many neutrons are contained in 2 kg? Mass of one neutron is 1.67x10-27 kg.

Physics

1 answer:

pav-90 [236]4 years ago

8 0

Answer:

1.2 × 10^27 neutrons

Explanation:

If one neutron = 1.67 × 10^-27 kg

then in 2kg...the number of neutrons

; 2 ÷ 1.67 × 10^-27

There are.... 1.2 × 10^27 neutrons

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Which element is usually listed first in the formula of a binary

Elina [12.6K]

Answer: the element with the lowest electronegativity

Explanation:

3 0

3 years ago

A volleyball player bumps a ball across a net with the velocity and angle shown below. What is the maximum height of the ball?

Marrrta [24]

Answer:

D. 12.4 m

Explanation:

Given that,

The initial velocity of the ball, u = 18 m/s

The angle at which the ball is projected, θ = 60°

The maximum height of the ball is given by the formula

h = u² sin²θ/2g m

Where,

g - acceleration due to gravity. (9.8 m/s)

Substituting the values in the above equation

h = 18² · sin²60 / 2 x 9.8

= 18² x 0.75 / 2 x 9.8

= 12.4 m

Hence, the maximum height of the ball attained, h = 12.4 m

6 0

3 years ago

Which law states that a charge cannot be created or destroyed?. A. Law of Conservation of Charge . B. Law of Conservation of Mot

Sedbober [7]

The correct answer for the given question above would be option D. The law that states that a charge cannot be created nor destroyed is the Law of Conservation of Energy. The Law of Conservation of Energy states that the total amount of energy in an isolated system remains constant over time. Therefore, it can never be created nor destroyed.

7 0

4 years ago

Optics of the eye: the closest object that a typical young person with normal vision can focus on clearly is closest to:______.

Natali [406]

The human eye is one of the most valuable sense organ. The closest object that a typical young person with normal vision can focus closest to is 25 cm

The lens in the eye forms the image on the retina. The image formed is real and inverted. The retina is a very delicate membrane containing numerous light sensitive cells.

This light sensitive cells gets activated when light falls on it and generates electric signals. These electric signals are sent to the brain via the optic nerves present in the eye. The brain finally processes these signals and thus we see the object clearly.

The ability of the lens of the eye to adjust its focal length accordingly is called the power of accommodation,

The minimum distance, at which the object can be seen clearly without any strain is called the least distance of distinct vision.

To see an object clearly without any strain is when we place it at about 25 cm from the eye.

Tolearn more about optics of the eye : brainly.com/question/22371574

#SPJ4

5 0

2 years ago

) Calculate current passing in an electrical circuit if you know that the voltage is 8 volts and the resistance is 10 ohms

Svetach [21]

Explanation:

Hey, there!

Here, In question given that, 

potential difference (V)= 8V

resistance (R)= 10 ohm

Now,

According to the Ohm's law,

V= R×I { where I = current}

or, I = V/R

or, I = 8/10

Therefore, current is 4/5 A or 0.8 A.

(A= ampere = unit of current).

Hope it helps... 

6 0

4 years ago