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3 years ago

Plz help me it is improtant

Physics

1 answer:

marishachu [46]3 years ago

7 0

I think it is b cause I don’t think you do that

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HELP PLEASE<br>I need help on these 2 questions

Olegator [25]

I will be brief

5. There is no displacement as it didn't move

6. Time cannot go backwards so it cannot be negative

8 0

4 years ago

What is Mass definition for physics

jolli1 [7]

Answer:

Scientific Definition of Mass Mass is the quantity of inertia (resistance to acceleration) possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion (force equals mass times acceleration).

Explanation:

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And Another Wendys Roast

4 0

3 years ago

The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10âˆ’12w/m2. Find the

Monica [59]

Answer:

The distance d from the car at which the sound from the stereo can still be discerned = 97720.5 m

Explanation:

Sound intensity heard at distance is related to the distance with the relation = (power of sound at the source)/(surface area of the wall of an imaginary sphere at the distance in question)

I = P/4πd²

Assuming the car has 2 speakers,

P = 0.06 W × 2 = 0.12 W

d = ?

For the intensity of the least discernible sound,

I = 10⁻¹² W/m²

10⁻¹² = 0.12/4πd²

d = 97720.5 m

8 0

3 years ago

The construction of a flat rectangular roof (6.17 m × 5.92 m) allows it to withstand a maximum net outward force of 2.00 × 104 N

Blababa [14]

Answer:

$v_2=29.13\ m/s$

Explanation:

It is given that,

Dimension of the rectangular roof, (6.17 m × 5.92 m)

The maximum net outward force, $F=2\times 10^4\ N$

The density of air, $\rho=1.29\ kg/m^3$

The Bernoulli equation is used to find wind speed of this roof blow outward. It is given by :

$P_1+\dfrac{1}{2}\rho v_1^2=P_2+\dfrac{1}{2}\rho v_2^2$

Here, $v_1=0$ (since air inside the roof is not moving)

$v_2=\sqrt{\dfrac{2(P_1-P_2)}{\rho}}$

Since, $F=(P_1-P_2)A$

$v_2=\sqrt{\dfrac{2F}{\rho A}}$

$v_2=\sqrt{\dfrac{2\times 2\times 10^4}{1.29\times 6.17\times 5.92 }}$

$v_2=29.13\ m/s$

So, the wind speed of this roof blow outward is 29.13 m/s. Hence, this is the required solution.

5 0

4 years ago

Which states of a hydrogen atom can be excited by a collision with an electron with kinetic energy k = 12. 5 ev?

Sophie [7]

The answer is the excited state of the hydrogen atom, n=24 and Z=23

Kinetic energy of electron is, $\mathrm{KE}=\frac{13.6 \mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$

For the excited state of the hydrogen atom , n=24 and Z=23

K.E= $\frac{13.6 \times 23^{2}}{24^{2}}=$ 12.5

What is the hydrogen atom?

The hydrogen atom is the most basic of all the atoms since it just has one proton and one electron.
There are two more hydrogen isotopes, deuterium and tritium, in addition to protium, which is the most prevalent form of the atom.
The hydrogen atom consists of a proton and an electron, and has a spherical symmetry that can most easily be studied using a spherical polar coordinate frame.

To learn more about hydrogen atom visit: brainly.com/question/1462347?

#SPJ4

5 0

2 years ago