The density of balsa wood is 0.170 g/cm3.  What is the mass if the volume is 12.0 mL?

Answer:

Evolution, mutation of genes

Explanation:

Evolution is the primary reason of undergo changes in speicies.There is also another reason why, which is the genetic mutation a creature has, like a toad becomes albino.

Answer:

Q₁ = 15.78 KJ

W = 5.76 KJ

Explanation:

First we find efficiency of this ideal Carnot engine:

Efficiency = 1 - T₂/T₁

T₁ = source temperature = 125°C + 273 = 398 K

T₂ = Sink Temperature = -20°C + 273 = 253 K

Therefore,

Efficiency = 1 - 253 K/398 K

Efficiency = 0.365 = 36.5%

Now, we find expelled heat (Q₂), by using latent heat of fusion of ice:

Q₂ = mH

where,

m = mass of ice melted = 30 g = 0.03 kg

H = Latent Heat of Fusion of Ice = 3.34 x 10⁵ J/kg

Therefore,

Q₂ = (0.03 kg)(3.34 x 10⁵ J/kg)

Q₂ = 1.002 x 10⁴ J = 10.02 KJ

Now, we use another formula of efficiency to find absorbed heat (Q₁):

Efficiency = 1 - Q₂/Q₁

0.365 = 1 - 10.02 KJ/Q₁

10.02 KJ/Q₁ = 1 - 0.365

Q₁ = 10.02 KJ/0.635

Q₁ = 15.78 KJ

Now, for work done we have the formula:

W = Q₁ - Q₂

W = 15.78 KJ - 10.02 KJ

W = 5.76 KJ

Answer:

A

Explanation:

so it looks unequell but it is.

Answer:

The rock takes 1.22 seconds to hit the ground

Explanation:

Free Fall Motion

A free-falling object falls under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall. Free-falling objects do not encounter air resistance.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is g = 9.8 m/s^2.

The final velocity of a free-falling object after a time t is given by:

vf=g.t

The distance traveled by a dropped object is:

[tex]\displaystyle y=\frac{gt^2}{2}[/tex]

If we know the height h from which the object was dropped, we can find the time it takes fo hit the ground:

[tex]\displaystyle t=\sqrt{\frac{2y}{g}}[/tex]

[tex]\displaystyle t=\sqrt{\frac{2\cdot 6}{9.8}}[/tex]

[tex]t=1.22\ sec.[/tex]

The rock takes 1.22 seconds to hit the ground

The time taken for the rock to hit the ground from the roof top is 1.1 seconds.

Given the data in the question;

Since the rock was initially at rest

Time taken for the rock to hit the ground; [tex]t = \ ?[/tex]

To determine the time taken for the rock to hit the ground, we use the second equation of motion:

[tex]s = u + \frac{1}{2}at^2[/tex]

Where s is the height or distance, u is the initial velocity, t is time taken and a is acceleration due to gravity( since the rock will be under gravity, [tex]a = g = 9.8m/s^2[/tex] )

We substitute our values into the equation

[tex]6m = 0 + [ \frac{1}{2}\ *\ 9.8m/s^2\ * t^2 ]\\\\6m = 4.9m/s^2 \ * t^2\\\\t^2 = \frac{6m}{4.9m/s^2}\\\\t = \sqrt{\frac{6m}{4.9m/s^2}} \\\\t = 1.1s[/tex]

Therefore, time taken for the rock to hit the ground from the roof top is 1.1 seconds.

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Answer:

A

Explanation:

There are three basic forces in aerodynamics: acceleration, which moves an airplane forward; drag, which holds it back; and height, which keeps it airborne. Lift is generally explained by three theories: Bernoulli's principle, the Coanda effect, and Newton's third law of motion.

Answer:

state population

Explanation:

bestie you can find it on Constitution on article l

Answer:

atoms

Explanation:

.....(✿^‿^).......

Answer:

atom

Explanation:

An atom is the smallest unit of matter that retains all of the chemical properties of an element

Answer:

Indirect relationship

Answer:

No you should not go

Explanation:

Because if you go you will be more behind and then you’ll get so stressed from the work that you didn’t do and then it will just keep on stacking up and get more and more stressed and also another reason is because you should do the responsible choice and stay home and work on your project so you would be telling your friend that you can not go Because you got work to do and maybe you could schedule it for the next weekend and have your fun next week and you should always do the responsible choice.

Answer:

This question appears incomplete

Explanation:

However, this question seeks to seek our knowledge of Lenz law which states that the current produced by an induced emf (electromotive force) moves/flows in the direction opposite to the change in flux that induced the emf.

From this law, it can be noted from the question that the magnetic pole produced (at P), when the south pole of the magnet is brought towards the solenoid, is the south pole while the magnetic pole produced (at P), when the south pole of the magnet is taken away/changed from the solenoid, is the north pole.

It should be noted that solenoid is an electromagnetic device (and can hence be used to induce emf) that can convert electrical energy to mechanical energy.

Answer:

Vrel_jon's = 15 [m/s] to the right

Explanation:

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion.

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion. The relative velocity is defined as the algebraic sum of the velocities, if the movements are opposite the vectors are subtracted, as will be done below.

Vrel = 20 - 5 = 15 [m/s]

A person watching Jon sees him moving to the right at a speed of 15 [m/s]

Answer:

40.8 m North West.

Explanation:

Please see attached photo for diagram.

In the attached photo, R represent the displacement of the dog.

The displacement (R) of the dog can obtained by using the pythagoras theory as illustrated below:

R² = 35² + 21²

R² = 1225 + 441

R² = 1666

Take the square root of both side.

R = √1666

R = 40.8 m North West.

Therefore, the displacement of the dog is 40.8 m North West.

Answer:

A compound has unique properties that are distinct from the properties of its elemental constituents. One familiar chemical compound is water, a liquid that is nonflammable and does not support combustion. It is composed of two elements: hydrogen, an extremely flammable gas, and oxygen, a gas that supports combustion.

Answer:

b because to react with something makes it a chemical reaction

Explanation:

Answer:

electrons

Explanation:

it just does

Answer:

No it will not (false)

Explanation:

I say this because if anything the ice will sink and melt from a solid to a liquid and that will lead to i guess more water for the aquatic life. (THIS IS A THEORY SHAWTY)

Answer:

B. 45 g because it is the given answer of the division that is given to the equation

Answer:

Mass of a body is fixed everywhere. True

Explanation:

Since amount of a matter is not dependent of place or position therefore it remains same at everywhere.

Hence value of mass of a body is fixed everywhere.

https://brainly.com/question/17304046

#SPJ2

Answer:

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

[tex]a = \frac{v}{t} \\ [/tex]

where

a is the acceleration

v is the velocity

t is the time

From the question

v = 27 m/s

t = 8 s

We have

[tex]a = \frac{27}{8} \\ = 3.375[/tex]

We have the final answer as

Hope this helps you

Answer:

ca taode na kadato itoi runa ko

Answer:

Explanation:

Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.

Frequency= no. of oscillations/time=40/60sec

4/6=0.66

Explanation:

derive its name from a Native American word meaning wild onion

Answer:

around 98 meters per second.

Explanation:

Instantaneous velocity can be found with a equation.

Vf=Vi+At

Since it fell and had no initial velocity the equation becomes

Vf=At

The Acceleration is 9.8 m/s^2

So the velocity of it fell for ten seconds is

Vf=9.8m/s^2 * 10

Vf= 98 m/s

Answer:

So if an object of mass m is raised through a height h, the work done on the object is equal to mgh, and so this amount of energy is transferred to the object. (Notice that this equation is identical to the one describing an object falling under gravity, Equation

One double bond consists 4 electrons, so 2 double bonds means 8 electrons

Answer: 8 electrons

Explanation:edg