Which of these elements would be the best
semiconductor?
O Ar
O Se
O Rh
O Po

The minimum amount of water needed for bathing assuming the water begins at room temperature is 16.58kg.

When two bodies at different temperature come into contact, they share the heat through conduction. After some time, temperature of both becomes equal. This condition is said to be a body in thermal equilibrium with other.

Heat gained by the water = heat lost by the ill person

m x Cw x ΔT = M x Cp x Δt

where, mass of person M = 80kg, Cp =specific heat of body =3470, specific heat of water Cw= 4186, then mass of water m will be

m x 4186 x (37-25) =- 80 x 3470 x (37-40)

m = 16.58kg

Thus, the mass of water needed is 16.58kg.

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Answer:

6 v

Explanation:

V = IR

   = 3 A * 2 ohm = 6 v

Emotional elevation can occur in individuals or in groups, therefore, it is false that emotional elevation only occurs in animal kin groups.

Emotional elevation is the process whereby the moods of individuals are elevated due to their interactions with others or due to other factors.

Emotional elevation can occurs in individual animals or those on animal kin groups.

Therefore, it is false that emotional elevation only occurs in animal kin groups.

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Answer:

F

Explanation:

Let's find the relationship

[tex]\\ \rm\Rrightarrow E=h\nu[/tex]

[tex]\\ \rm\Rrightarrow \lambda=\dfrac{c}{\nu}[/tex]

Answer:

Option D

Explanation:

Option D is correct

Answer:

According to the standard big bang model of cosmology, time began together with the universe in a singularity approximately 14 billion years ago.

Explanation: the big bang

Answer:

approximately 14 billion years ago

Let's see

[tex]\\ \rm\Rrightarrow \dfrac{KE_1}{KE_2}=\dfrac{2}{1}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{0.5(2)v_1^2}{0.5(8v_2^2)}=\dfrac{2}{1}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{v_1^2}{4v_2^2}=\dfrac{2}{1}[/tex]

[tex]\\ \rm\Rrightarrow v_1^2=8v_2^2[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{v_1^2}{v_2^2}=\dfrac{8}{1}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{v_1}{v_2}=\dfrac{2\sqrt{2}}{1}[/tex]

[tex]\\ \rm\Rrightarrow v_1:v_2=2\sqrt{2}:1[/tex]

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Answer:

cows a consumer

Explanation:

because it can make food by its own

Answer:

the rainbow spectrum. red orange yellow green blue violet. It breaks into ultra violet.

Explanation:

Answer:

See below ~

Explanation:

An object will sink in water when its density is greater than that of water, which is 1 g/cm³.

Volume of the box is 1331 cm³. (11³)

Maximum mass of sand will be 1331 g. [because 1331/1331 = 1 g/cm³]

If the volume of sand is greater than 380.29 cm³, the box will sink in water.

Heat capacity is the amount of heat required to raise the temperature of an object by 1oC. The specific heat of a substance is the amount of energy required to raise the temperature of 1 gram of the substance by 1oC.

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The decay constant for radium-226 is larger than the decay constant for carbon-14 due to its obtained value.

The reduction in the number of radionuclides per unit time is the rate of decay.

The decay constant of the radium-226 is;

[tex]\lambda_1=\frac{ 16}{100}\times 266 \\\\ \lambda_1= -36.16[/tex]

The decay constant of the carbon-14 is;

[tex]\lambda_2=\frac{ -57.3}{100}\times 14 \\\\ \lambda_1= -802.2[/tex]

Hence, the decay constant for radium-226 is larger than the decay constant for carbon-14.

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Answer:

  0.693/1600 > 0.693/5730

Explanation:

The decay constant is the reciprocal of the time it takes for the radioactivity to decline to about 36.8% of its original value. It is the value of k in the multiplier e^(-kt), which tells the fraction remaining after time t.

When compared to the half-life, h, the value of k is ...

  k = 0.693/h . . . . . decay constant for half-life h

Effectively, the decay constant is proportional to the inverse of the half-life. The constant of proportionality is ln(2) ≈ 0.693.

__

decay constant for radium-226:

  0.693/1600 ≈ 4.33×10^-4

decay constant for carbon-14:

  0.693/5730 ≈ 1.21×10^-4

Since 4.33×10^-4 is greater than 1.21×10^-4, the decay constant of radium-226 is larger than that of carbon-14.

_____

Additional comment

Taking the reciprocal of a positive number reverses the ordering:

  1600 < 5730

  1/1600 > 1/5730

The half-life of radium-226 is less than that of carbon-14, so its decay constant will be larger.

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Weather

Explanation:

As during climate only one season change to another and it's a long period of time

while in weather it's can change into any season for few days depending on the relief of the area.

Answer:

weather

Explanation:

There is often confusion between weather and climate. Weather is the condition of the atmosphere at a particular place over a short period of time.

Answer:

Explanation:

Weight of soccer ball

Weight of watermelon

As the watermelon has more weight, it will hit the ground first.

The current flowing in the 4 ohms resistor connected in series with 5-ohm resistor is determined as 1.0 A.

The equivalent resistance of the circuit is determine as follows;

Rt = R1 + R2

Rt = 4 ohms + 5 ohms = 9 ohms

The current flowing in the 4 ohms resistor is determined from Ohms law as shown below;

V = IR

I = V/R

I = 9/9

I = 1.0 A

Since the circuit is in series arrangement, same current will flow in 5 ohm and 4 -ohm.

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Comparing and analyzing the brightness of near and farther streetlight would support the student’s argument.

The brightness of nearer streetlight is more as compared to the brightness of the farther light because brightness decreases with the increase in distance.

So we can conclude that comparing and analyzing the brightness of near and farther streetlight would support the student’s argument.

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The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.

The electromagnetic radiation distribution in accordance with the frequency or wavelength is known as the electromagnetic spectrum.

The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.

Hence, option b is correct.

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Answer:

true

Explanation:

because rubbing together they will both have friction

Answer:

F = F2 - F1     where F is the net force upwards

F = 5 - (.5 * 9.8) = (5 - 4.9) N = .1 N

Since there is a net force in the upwards direction the rocket should experience an upwards acceleration.

Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

The electric power is expressed as P = VI.

Where V is the potential difference, I is the electric current and P is the electric power.

Also, the consumption of energy per unit of time is called power. It is expressed as P = E / t

Given that;

First, we determine the power.

P = E / t

P = 500J / 5s

Power = 100W

Next, we determine the potential difference.

P = V × I

V = P / I

V = 100W / 2.00A

V = 50V

Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

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The Potential difference is 50 Volts.

The potential difference is a measure of the energy given to the charge carriers in a circuit

We know that  the electric power is expressed as P = VI.

V is the potential difference

I is the electric current
P is the electric power.

Also we know that power is expressed as P = E / t

Given

Current( I) = 2.00A ,time t = 5s

Total energy E = 500J

To find the power

P = E / t  = 500J / 5s = 100W

Now , To find the potential difference.

P = V × I (By rearranging it)

V = P / I

V = 100W / 2.00A = 50 V

Therefore , the total energy in the wire, current and time elapsed, the potential difference is 50 V.

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Net force

As it's negative the box will move left

Answer:

A) .27 A

Explanation:

v = ir

i = v/r

equivalent r  =   45 * 90 / (45+90) = 30 ohms    ( for the two r in parallel)

i = 8v / 30 ohm = 267 mAmps

Answer: yes

Explanation: it's fueled by nuclear reactions that fuse hydrogen atoms together into helium and other heavier elements, releasing huge amounts of energy in the process.

The magnitude of the electric field inside the conductor will be 0.208 N/C.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

Given data;

length of rod = 25 cm = 0.25 m

Potential Difference = 52 mV = 0.052 Volts

The electric field is found as the ratio of the potential difference and the length;

[tex]\rm E =\frac{0.052}{0.25} \\\\ E=0.208 \ N/C[/tex]

Hence,the magnitude of the electric field inside the conductor will be 0.208 N/C.

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What best explains Horatio’s error is the magnetic field does not continually spread outward from the wire. Option B. This is further explained below.

Generally, a Magnetic field is simply defined as an area of magnetism that exists around a magnetic substance or a moving electric charge.

In conclusion, The magnetic field does not continuously expand outward from the wire, which best explains Horatio's miscalculation.

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Answer:

B

Explanation:

Answer:

A. adjust the seat so you can reach all controls

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This is so you can reach the gas petal, break petal, steering wheel, (and other things) easier so you won't have to lean forward and it makes it easier for when you're driving. Especially if you need to quickly press your breaks, you'll be able to do this a lot faster if you're closer to them than if you had to reach in order to do so.

I hope this helped, im not the best at explaining things lol

Answer:

True

Explanation:

because their is friction(e.g take a ruler rub it in your hair then put it on top of a piece of paper on the table then u will see the process)among the two objects.