What could it be.... (science)

Answer:

A) blindness

Explanation:

Answer:

E = 12.9 kJ

Explanation:

Given that,

Mass of John, m = 55 kg

It is standing on the edge of a diving board which is at a height of 24 m.

We need to find his mechanical energy. The mechanical energy of John is equal to its potential energy such that,

E = mgh

E = 55  kg × 9.8 m/s² × 24

E = 12936  J

or

E = 12.9 kJ

So, his mechanical energy is equal to 12.9 kJ.

Answer:

true

Explanation:

Answer:

Explanation:

A. True

B. Lead is a conductor....

Answer:

v_t = [tex]\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }[/tex]

Explanation:

Let's describe the motion and forces on the marble when it falls into the graduated cylinder filled with water.

Initially, the marble in the air falls under the influence of its weight (gravity force), when it enters the water, a friction force appears that INCREASES with SPEED and opposes the movement, this force is called Stokes force.

              Fr = 6π R η v

where η is the viscosity of water

also because of this in a liquid it has an upward thrust, given by Archimedes' law, this thrust is CONSTANT

              B = ρ_l g V_l

in that case the volume of liquid(V_l)  is equal to the volume of the marble.

Constant force of gravity

               W = mg

using the concept of density

                ρ_body = m / V

                W = ρ_body g V_body

we apply Newton's second law

                Fr + B - W = ma

the friction force increases and the other two are constant, so acceleration decreases until reaching zero, at this point the forces are in BALANCE

                Fr + B - W = 0

and the speed remains constant, being called TERMINAL SPEED

                v_t = [tex]\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }[/tex]

from this point on, the displacement is proportional to the time

Answer:

The sand absorbed more heat than the soil.

Explanation:

your welcome

Answer: D.

Explanation:

Answer: The answer is D

Explanation: I got it right on my test

Answer:

It controls the amount of current.

Explanation:

A resistor helps control and maintain the circuit which is it's main function.

Answer:

The Four Elements in Everyday Life.

First Element: Earth. The earth is full of a wide variety of rocks and minerals which provides the soil to grow vegetation and support life. The two ...

Second Element: Water.

Third Element: Air.

Fourth Element: Fire.

Hope this help you!:)

Answer: 18 5.0 012

Explanation:

Oil is used in industrial hydraulic systems, because It is environmentally safe. Option C is correct.

Hydraulic systems work and accomplish tasks by utilizing a pressured fluid. Another way to say it is that the pressurized fluid makes everything operate.

Because of the tremendous power of liquid fuel in hydraulics, hydraulics are often utilized in heavy machinery.

Oil is used in industrial hydraulic systems, because It is environmentally safe.

Hence,option C is correct.

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#SPJ2

Answer:

:c: H* : A: :C: H* :A: :C: H* :A:

Assuming brown hair (B) color is completely dominant over blond hair (b), then the father's genotype must be bb.

the angle of incidence is always equal to the angle of reflection,

Explanation:

Important Information. When light is reflected from a surface, the angle of incidence is always equal to the angle of reflection, where both angles are measured from the path of the light to the normal to the surface at the point at which light strikes the surface. This equality is known as the law of reflection.

Answer:

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface

Globular star clusters form from tightly packed groups and/or older ancient stars.

Globular star clusters can be defined as ancient stars packed in a spherical and/or symmetrical shape.

Globular star clusters represent the most common types of groups (i.e., clusters) of ancient stars.

These groups of stars (globular) are characterized to be densest in the center of the cluster.

In conclusion, globular star clusters form from tightly packed groups and/or older ancient stars.

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Answer:

P=I²R

Explanation:

P=2*10^-3 square times 10

4 times ten raise to power minus 5

Answer:

The power is 300 watts.

Explanation:

Given that,

Current, I = 20 a

Voltage, V = 15 volts

The electrical power of any device is given by the product of current and voltage. It can be given by :

P = VI

So,

P = 15 × 20

= 300 W

So, the power is 300 watts.

Answer:

can u make the picture less blurry pls

Explanation:

Answer: Lol “USE CORRECT UNITS!” I GOT YOU BABES: 9/3=3 current is 3 amperes.

Explanation:

Answer:

what

Explanation:

Answer:

El periodo del péndulo simple, para oscilaciones de poca amplitud, viene determinado por la longitud del mismo y la gravedad.

Explanation:

No influye la masa del cuerpo que oscila ni la amplitud de la oscilación. Donde: T: Periodo del péndulo.

Answer:

C

Explanation:

Without thinking, the answer is C.

The problem is with D. Of course it is going to depend on the transparency. If the material is a rock, then the light won't go through, and n >>>1.  I don't think you are intended to think that way, but I sure wish D wasn't there. I'd answer C, but be prepared to see it come out as D.

Answer:

it and i quote you "is less than in free space

Explanation:

i cant explain

Answer:

D

Explanation:

since we press the key , air molecules ate presented and sound wave is formed what we hear.

Answer:

B

Explanation:

Answer:

your answer is A

Explanation:

brainliest plzzzz

Answer:

c is the correct answer

Answer:

helium,oxygen, shoe blackboard,juice,coffe,iron,rock,ozoneand water

Answer:

To the Left

Explanation:

Answer:

PE = 882 J

Explanation:

Through the International System we know that the gravity of the earth is 9.8 m/s², so...

Data:

Formula:

Replace and solve:

The potential energy of the sled is 882 Joules.

Greetings.

Answer:

It must be 225 J.

Explanation:

According to

Work done = Force × distance travelled

                    =  75      × 3

                    = 225 J

This answer is taken so since no angles are stated in the question.

Answer:

The intensity of the net electric field will:

[tex]E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C[/tex]

Explanation:

Here we need first find the electric field due to the first charge at the midway point.

The electric field equation is given by:

[tex]|E_{1}|=k\frac{q_{1}}{d^{2}}[/tex]

Where:

So, we will have:

[tex]|E_{1}|=(9*10^{9})\frac{20*10^{-6}}{0.1^{2}}[/tex]

[tex]|E_{1}|=1.8*10^{7}\: N/C[/tex]

The direction of E1 is to the right of the midpoint.

Now, the second electric field is:

[tex]|E_{2}|=k\frac{q_{2}}{d^{2}}[/tex]

[tex]|E_{2}|=(9*10^{9})\frac{8*10^{-6}}{0.1^{2}}[/tex]

[tex]|E_{2}|=7.2*10^{6}\: N/C[/tex]

The direction of E2 is to the right of the midpoint because the second charge is negative.

Finally, the intensity of the net electric field will:

[tex]E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C[/tex]

I hope it helps you!

The net electric field midway between these two charges is 2.52 x 10⁷ N/C.

The electric field strength between two point charges is the force per unit charge.

Electric field strength due to +20.0 μC charge

[tex]E _1 = \frac{kq_1}{r^2} \\\\E_ 1 = \frac{9 \times 10^9 \times 20 \times 10^{-6}}{(0.1)^2} \\\\E _1 = 18 \times 10^6 \ N/C[/tex]

Electric field strength due to -8μC charge

[tex]E _2 = \frac{kq_2}{r^2} \\\\E_ 2 = \frac{9 \times 10^9 \times 8 \times 10^{-6}}{(0.1)^2} \\\\E _2 = 7.2 \times 10^6 \ N/C[/tex]

The net electric field midway between these two charges is calculated as follows;

[tex]E_{net} = 18 \times 10^6 \ + \ 7.2 \times 10^6\\\\E_{net} = 25.2 \times 10^6 \ N/C\\\\E_{net} = 2.52 \times 10^7 \ N/C[/tex]

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Answer:

A. Both open and close

Explanation:

just took the test