hi can someone pls answer the question number 2 pls i srsly need it. thank u :) ​

Answer:

ok its 58

Explanation:

yes

Answer:

Visible light has much smaller wavelengths and can pass through the holes unobstructed. It isn't possible to see (resolve) objects and features smaller than the wavelength of light (electromagnetic radiation) used so this is why the mesh works.

Explanation:

The flow of electricity in a certain path is the circuit.

The bottleneck event of the plants in an area results in secondary succession.

A bottleneck is an event that drastically reduces the population size of an organism. The bottleneck may be caused by various events, such as an environmental disaster, the hunting or habitat destruction that results in the deaths of organisms.

Secondary succession is a type of ecological succession in which plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity e.g., farming or road or building construction.

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Answer:

the glass and paper have diffrent charges

Explanation:

if the glass is charged positively then the paper was charged negatively

the to charges were to attract think of it as a magnet

Answer:

The answer is B. the glass and the paper have different charges

Explanation:

The glass will attract the pieces of paper. Remember opposite charges attract

Answer:

The velocity of model rocket 1 second after ignition is 50 m/s.

Explanation:

time taken(t) = 1 second

initial velocity (u) = 0 m/s

acceleration (a) = 50 m/s²

final velocity (v) = ?

Now,

a = (v-u)/t

or, 50 = (v-0)/1

or, 50 = v

so, v = 50 m/s

Apply first equation of kinematics

[tex]\\ \tt\hookrightarrow v=u+at[/tex]

[tex]\\ \tt\hookrightarrow v=0+50(1)[/tex]

[tex]\\ \tt\hookrightarrow v=50+0[/tex]

[tex]\\ \tt\hookrightarrow v=50m/s[/tex]

Hi there!

We can use a summation of torques to solve.

Recall the equation for torque:
[tex]\large\boxed{\Sigma \tau = rF}[/tex]

r = distance from fulcrum (balance point)

F = force (in this instance, weight, N)

We can set the fulcrum to be the balance point of 30 cm.

Thus:
Meter ruler:

Center of mass at 48 cm ⇒ 48 - 30 = 18 cm

Object:
At 6cm ⇒ 30 - 6 = 24 cm

For the ruler to be balanced:
[tex]\large\boxed{\Sigma \tau_{cc} = \Sigma \tau_{ccw}}[/tex]

Thus:
[tex]M_Rg(18) = 60g(24)\\M_R = \frac{60(24)}{18} = \boxed{80 g}[/tex]

The mass of the ruler is 80 grams.

If the body were moved to 13 cm:
B (balance point) - 13 = distance of object

48 - B = distance from ruler center of mass to balance point

[tex]80g(48 - B) = 60g(B - 13)\\\\3840 - 80B = 60B - 780\\\\4620 = 140B\\\boxed{B = 33 cm}[/tex]

The new balance point would be 33cm from the zero end.

The mass slows to a rest from an initial speed of 10.0 m/s in a matter of 1.50 s. If we assume constant acceleration, then the mass has acceleration a such that

0 = 10.0 m/s + a (1.50 s)   ⇒   a ≈ -(10.0 m/s)/(1.50 s)

The net force acting on the mass as it slows down is

∑ F[horizontal] = -F[friction] = ma

where m = 15.0 kg, and we take the direction in which friction is acting to be negative. Then

-F[friction] = -(15.0 kg) (10.0 m/s)/(1.50 s)   ⇒   F[friction] = 100 N

Answer:

375 km

Explanation:

Using the equation, d = vt, we simply plug in the numbers:

v = 150 km/hr

t = 2.5 h

d = (150 km/hr)*(2.5 h)

d = 375 km

Answer:

Balloon

Explanation:

it inflates because of the air pressure inside

Answer:

Explanation:

KE =1/2mv²

KE =1/2(1000kg)(15m/s)²

KE = 500kg (225 m²/s²)

KE = 112,500 JJ

Answer:

.

Explanation:

Can you specify what is the question asking for

Answer:

market

Explanation:

took the quiz

He can make the experiment more reliable by repeating the experiments about three times and then taking the average value.

Conduction is a mode of heat transfer in which there is no actual movement of the particles of the substance. Oliver can make his results more reliable by accurately observing the time taken before the pin falls off and by repeating the experiments about three times and then taking the average value.

Also, he need to;

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Answer:

Vibrations

Explanation:

That is why when under water it sounds muffled and you cannot hear clearly.

Answer:

Vibrations

Explanation:

Vibrations are transferred through water. That's how dolphins are able to tell where food, family, and objects are

please vote brainliest!!

Answer:

6 kg

Explanation:

p = mv

Answer:

Wire length, current value, and potential difference certainly belong to the continuous category.

Perhaps, eye color would be the 4'th value because of the continuity involved

With the use of formula, the frequency of the tuning fork is 13.6 Hz

A tuning fork can be used to determine the speed of sound in air using a resonance tube. The apparatus needed for this experiment are;

The experiment begins when a student holds a pipe vertically, with one end submerged in water while the opposite end is out in the air. Just above the pipe, the student holds a tuning fork. The student carefully moves the pipe up and down, varying the level of water inside of it, until they detect a strong resonant sound.

Given that the student detects this sound when the length of air inside of the pipe measures 56.25 cm, and then again when the length is 68.75 cm. Taking the speed of sound in air to be of 340. m s–1.

The parameters given are:

[tex]L_{1}[/tex] = 56.25 cm

[tex]L_{2}[/tex] = 68.75 cm

V = 340 m/s

The formula to use for this question is

V = 2F( [tex]L_{2}[/tex] - [tex]L_{1}[/tex] )

340 = 2F (68.75 - 56.25)

340 = 2 x 12.5 x F

340 = 25F

F = 340/25

F = 13.6 Hz

Therefore, the frequency of the tuning fork is 13.6 Hz

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Answer:

In both scenarios the speed would increase

Answer:

What would happen to the speed of a sound wave if it moved from ocean water to air?

✔ It would slow down.

What would happen to the speed of a sound wave if it moved from a cooler room to a warmer one?

✔ It would speed up.

:)

Answer:

$18

Explanation:

Each of the was qiven $18

All together =24

24 divide it by 4 (because there were 4 people there)

= 6  (6+6+6+6)

= 24

=6+12=18    

.Hence each of them was given $18

Answer:

4(m−12)=24

4m-48=24

4m= 24+48

4m=72

m=18

Explanation:

it correct i did it on my school work and get an A+

The sound power the person generated is [tex]2.313 \times 10^{-5} \ W[/tex].

The area of the sound wave is calculated as follows;

[tex]A = 4\pi r^2\\\\A = 4 \pi \times (2)^2\\\\A = 50.272 \ m^2[/tex]

The sound power the person generated is calculated as follows;

[tex]P = I A\\\\P = 4.6\times 10^{-7} \ W/m^2 \ \ \times \ \ 50.272 \ m^2\\\\P = 2.313 \times 10^{-5} \ W[/tex]

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We have that the dipole moment in nCm is considering the parameters

electric field strength 1.5 cm and  the axis of the dipole, is 1.5×105 N/C. is

From the question we are told

The electric field strength 1.5 cm from an electric dipole, on the axis of the dipole, is 1.5×105 N/C.

Generally the equation for the Electric field  is mathematically given as

[tex]E=\frac{2P}{4\pi*r^3}\\\\Therefore\\\\P=\frac{ 1.5×10^5*1.5*10^{-3}}{2}\\\\[/tex]

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'These"

Explanation: galaxy

Answer:

More dense

Explanation:

Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.

The expression for the time period using method of dimensions is [tex]T = [L]^{1/2}\times [LT^{-2}]^{-1/2}[/tex].

The period of oscillation of a simple pendulum is the time taken for the pendulum to make a complete rotation.

The period of oscillation of a simple pendulum is calculated as;

[tex]T = 2\pi \sqrt{\frac{l}{g} }[/tex]

where;

L is length (m)

g is acceleration due to gravity (m/s²)

The expression for the time period using method of dimensions is given as;

[tex]T = [L]^{1/2}\times [LT^{-2}]^{-1/2}[/tex]

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The spacing between the fringes does not depend on the width of the slit.

The light intensity produced by the slits increases with increased width of the slit. The screen thus develops brighter fringes as the slit width increases.

On the screen, coloured fringes will be created if the white light replaces monochromatic light.

Diffraction is the breaking up of an electromagnetic wave as it passes a geometric structure (e.g. a slit), followed by reconstruction of the wave by interference. Diffraction occurs for all types of waves, including sound waves.

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Answer:

If an objecta is at equilibrium, then all the individual forces are balanced. There is no unbalanced force acting upon the objecta.