Help me plssssss !! :)))))

Answer:

hitting it with a hammer to determine if it breaks or bends

Answer:

exposing it to a flame to see if it catches on fire

Explanation:

A chemical property is when the matter changes into a different substance. This is true when you expose it to a flame because if a substance is burned, it will change into a new substance. All the other options are examples of physical changes.

-I also took the quiz and got 100%

Hope this helps!

Answer:

3 seconds

Explanation:

Applying,

Applying,

v = u±gt................ Equation 1

Where v = final velocity, u = initial velocity, t = time, g = acceleration due to gravity.

From the question,

Given: v = 0 m/s ( at the maximum height), u = 30 m/s

Constant: g = -10 m/s

Substitute these values into equation 1

0 = 30-10t

10t = 30

t = 30/10

t = 3 seconds

Answer:

there it is fella tried o. ma own consciousness

Answer:

  W = 3.75 kJ

Explanation:

Power is defined by the relational

          P = W / t

          W = P t

the yield is 25% = 0.25

           W = 0.25 Wo

           W = 0.25 250 60

           W = 3750 J

            W = 3.75 kJ

Answer:

Graph B

Explanation:

Graph B represents the motion of the body as the body moves at a speed first this show the rise in speed. And then it's comes to rest where time is constant the speed drops down and the body comes to rest...

Answer:

induced current

Explanation:

intentionally manipulated.

Answer:

1. Magnet Polarity 2.Induced Current

Explanation:

Like the guy above said

Answer:

10 segundos.

Explanation:

Primero sabemos que la unidad Hz es equivalente a uno sobre segundo, entonces:

1 Hz = 1 s^-1

Lego sabemos que la relación entre frecuencia f y periodo T es:

T = 1/f

Entonces el periodo es la inversa de la frecuencia.

Si en este caso sabemos que la frecuencia es 0.10 Hz, tenemos:

f = 0.10 Hz = 0.10 s^-1

Entonces el periodo sera:

T = 1/f = 1/(0.10 s^-1) = (1/0.10) s = 10 s

Esto significa que una vibración completa le toma 10 segundos.

Answer: The statement gaining potential energy is always associated with a force field, is true about potential energy.

Explanation:

The energy acquired by an object due to its position is called potential energy.

Basically, a force field exerts a force that gives rise to potential energy of an object. For example, gravity, spring force etc.

This means that gaining potential energy is always associated with a force field.

A change in position does not always means that an object gains potential energy. For example, a spring will have more potential energy when it is compressed or stretched.

Hence, change in position of an object not necessarily means always gain in potential energy.

There are two types of potential energy that is, gravitational potential energy and elastic potential energy.

Thus, we can conclude that the statement gaining potential energy is always associated with a force field, is true about potential energy.

Answer:

Explanation:

The first one and the last one are the correct answer.

Explanation:

everything can be found in the picture

Answer: The answer is C.

Explanation: 1 centimeter is equal to 0.01 of a meter and 178 centimeters times 0.01 is 1.78 meters, Hope that helps

Answer: the pressure increases with the amount of water pushing in on all sides of the diver, for example, when you jump into a pool and you head is above water it a little harder to breathe, it is the same way for divers when they are diving at increasingly deep depths, the deeper you are the more water is pressing in on you.

Explanation:

Answer:

I'm pretty sure the velocity is 2.88 m/s

Explanation:

hope this is right good luck

Answer:

0.348

Explanation:

Acellus

Answer:

a) The distance is 30 km

The time duration is 5 hours

b) s₁ is approximately 28.142 km or s₁ is approximately 1.505 km

Explanation:

The initial speed with of the person, v₁ = 6 km/h

The distance the walked by the person, d = From point A to point B

The rate at which the person increases the speed, Δv = 1.5 km/h

The time it takes for the person to arrive at point B from point A at the new speed, t₂ = 1 hour earlier than when walking at 6 km/h

a) Let t₁ represent the time it takes the person walking from point A to point B at 6 km/h, we have;

t₂ = t₁ - 1...(1)

d/t₁ = 6...(2)

d/t₂ = 6 + 1.5 = 7.5

∴ d/t₂ = 7.5...(3)

From equation (2), we have;

d = 6 × t₁ = 6·t₁

Plugging in d = 6·t₁, and t₂ = t₁ - 1 in equation (3) gives;

d/t₂ = 7.5

∴ 6·t₁/t₁ - 1 = 7.5

6·t₁ = 7.5 × (t₁ - 1) = 7.5·t₁ - 7.5

7.5·t₁ - 6·t₁ = 7.5

1.5·t₁ = 7.5

t₁ = 7.5/1.5 = 5

t₁  = 5

The time it takes the person walking from point A to point B at 6 km/h, t₁  = 5 hours

The distance from point A to point B, d = 6 km/h × 5 hours = 30 km

b) The distance the person travels at the initial speed, v₁ (6 km/h) = s₁

The duration the person pauses for a rest = 15 minutes = 1/4 hours

The speed with which he walks the rest of the journey, v₂ = 7.5 km/h

The time earlier than expected that he arrives, Δt = 30 minutes = 0.5 hours

We note that the total distance, d = 30 km

The expected time, t₁ = 5 hours

Therefore, we have;

s₁ + s₂ = 30 km

s₂ = 30 - s₁

v₁/s₁ + 1/4 + v₂/s₂ = t₁ - 0.5

Therefore;

6/s₁ + 1/4 + 7.5/(30 - s₁) = 5 - 0.5 = 4.5

6/28.142+ 1/4 + 7.5/(30 - 28.142) = 5 - 0.5 = 4.5

6/s₁ + 7.5/(30 - s₁) = 4.5 - 1/4 = 4.25

-(3·s₁ + 360)/(2·s₁²- 60·s₁) = 4.25

2·s₁²- 60·s₁) × 4.25 + 3·s₁ + 360 = 0

17·s₁²- 504·s₁ + 720 = 0

s₁ = (504 ± √((-504)² - 4 × 17 × 720))/(2 × 17)

s₁ ≈ 28.142 or s₁ = 1.505

The distance the individual travels at v₁ = 6 km/h, s₁ ≈ 28.142 km or 1.505 km

Answer: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close because the kinetic energy of the particles of matter increases with the increase in temperature. In cold foods, kinetic energy is less while in hot foods, kinetic energy is more

hope this helps

Smell spreads due to diffusion. In hot food the molecules have a lot of kinetic energy , and they therefore spread fast , whereas in cold food the kinetic energy of the molecules are less and they don't spread far.

Answer:

big half like whale is so big

Answer:

7.2 N

Explanation:

Applying,

F = BIL................. Equation 1

Where F = Force due to current through the element, B = magnetic field, L = Length of the element.

From the question,

Given: B = 12 Tesla, L = 6 cm = 0.06 m, I = 10 A

Substitute these values into equation 1

F = 12(0.06)(10)

F = 7.2 N

Hence the force through the element is 7.2 N

Answer:

electron dot diagram is the answer to your question.

Answer:

the time period is 14.00

Explanation:

it.answer help you

Answer:

option 3, as circuit breakers are mostly used as precautions

Answer:

So, sensitivity of the galvanometer can be increased either by increasing the number of turns (N), using strong magnets or increasing the area of the coil (A). So, the correct answer is that the sensitivity of a moving coil galvanometer can be increased by increasing the number of turns of the coil.

Answer:

a refraction

b reflection

creflection

d refraction

brainliest plzz

Explanation:

f d exerxs#wzwzeixneizneunxudnxuexneixneuxbwhxe xje xejz ejznejzne

Answer:

We have,

then,

Answer:

[tex]N_P = 40\ N_S[/tex]

To reduce the output voltage to 6v in transformers if the input voltage is 240v​, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.

Explanation:

The change in voltage of a transformer depends upon the turns ratio of the transformer between secondary and primary coil. Following formula can be used to determine the turns ratio in this case:

[tex]\frac{N_P}{N_S} = \frac{V_P}{V_S} \\\\[/tex]

where,

[tex]N_P[/tex] = No. of turns in the primary coil

[tex]N_S[/tex] = No. of turns in the secondary coil

[tex]V_P[/tex] = voltage in the primary coil = 240 V

[tex]V_S[/tex] = voltage in the secondary coil = 6 V

Therefore,

[tex]\frac{N_P}{N_S} = \frac{240\ V}{6\ V} \\\\N_P = 40\ N_S[/tex]

To reduce the output voltage to 6v in transformers if the input voltage is 240v​, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.

Answer:

lowest level contains more energy

Explanation:

Answer:

The Answer is FRICTION!

Answer:

h = 44.5 m

Explanation:

Given that,

Power of the engine, P = 5 hP = 3728.5 W

Weight of the load, W = 2000 lb = 8900  kg

We need to find how high the load be raised in 10 s.

We know that,

Power, [tex]P=\dfrac{W}{t}[/tex]

Where

W is work done

Also,

1 Pound = 4.45 newtons earth (N)

[tex]P=\dfrac{F\times h}{t}\\\\h=\dfrac{Pt}{F}\\\\h=\dfrac{8900\times 10}{2000}\\\\h=44.5\ m[/tex]

So, the height raised by the load is 44.5 m.

Answer:

Explanation:

Let's call the large box "1" and the smaller box "2". The equation for this works so that momentum is conserved, as the Law states.

[tex][(m_1v_1+m_2v_2)]_b=[m_1+m_2)v]_a[/tex] That says that the momentum of the larger box plus the momentum of the smaller box before the collision has to equal the momentum of the combined masses since they stick together. Filling in:

[(4(12) + 2(0)] = [(4 + 2)v] and

48 + 0 = 6v so

v = 8 m/s to the right