If the speed of sound in air is 340 m/s, approximately how long will it take the sound of a clap of thunder to travel 2 kilometers?(1 point)

5.9 seconds

3.4 seconds

2.9 seconds

1.7 seconds

Answer:

How many atoms are in 3 grams of carbon? Well... (3 grams of carbon) x (1 mole of carbon/12 grams ) = 3/12 = 1/4 of a mole of carbon

Explanation:

1/4

Answer:

Here is your ans pic

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Explanation:

pls make brainliest

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Answer:

How are we expected to make an island

Answer: harvest moon

During the harvest season, they would worship the full moon, giving thanks for a plentiful harvest. The women in each family would prepare a table full of newly harvested rice and fruit, in an ancient tradition called 'charye. ' The origins of Chuseok can be traced back to this custom.

ceremonies

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3.416 kV is the lowest accelerating voltage.

The wavelength of X-ray,

λ= 0.0360 nm= 0.0360×10−9 m

For minimum wavelength

eV=hc/λ

∴V=hc/eλ

= ( 6.6×10^−34×3×10^8 )/(6×10^−19×0.0360×10^−9 )

=34.16×10^4V

= 3.416kV

The wavelength is a term used to describe waveform signals that are sent over wires or into space, and it is defined as the separation between two identical positions (adjacent crests) in succeeding cycles.

The wavelength is more frequently given in nanometers (nm), which are units of 10-9 m, or angstroms, which are units of 10-10 m, for infrared (IR), visible light (UV), and gamma radiation.

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The experiment's control consisted of the four treatments. The wild kind of mouse

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According to the given information of axis in the question, the magnitude of vector a is 3.55 m.

Based on the information given, we know that vector b has a magnitude of 7.1m. We also know that the sum of vector a and vector b results in a third vector that lies along the y axis and has a magnitude that is twice the magnitude of vector a.
Since vector b lies along the y axis (perpendicular to the x axis), we can conclude that vector a also has a component along the y axis. Therefore, we can express vector a as the sum of two components: one along the x axis and one along the y axis.
Let's call the x component of vector a "a_x" and the y component of vector a "a_y". Then we can write:
a = a_x + a_y
Since vector a lies along the x axis, its y component (a_y) must be zero. Therefore, we can simplify the above equation to:
a = a_x
Now let's consider the magnitudes of the vectors involved. We know that the magnitude of vector b is 7.1m. We also know that the magnitude of the third vector (resulting from the sum of vectors a and b) is twice the magnitude of vector a.
Let's call the magnitude of vector a "A". Then we can write:
|a + b| = 2A
We can also write the magnitudes of vectors a and b in terms of their components:
|a| = sqrt(a_x^2 + a_y^2)
|b| = 7.1m
And we know that the x component of the third vector (a + b) is zero, since it lies along the y axis. Therefore, we can write:
|a + b| = sqrt(a_y^2 + 7.1^2)
Now we can use these equations to solve for the magnitude of vector a. First, we'll use the equation for the magnitude of the third vector:
sqrt(a_y^2 + 7.1^2) = 2A
Squaring both sides of this equation, we get:
a_y^2 + 7.1^2 = 4A^2
Next, we'll use the equation for the magnitude of vector a:
|a| = sqrt(a_x^2 + a_y^2)
Since we know that a_y = 0, we can simplify this equation to:
|a| = sqrt(a_x^2)
|a| = |a_x|
Now we can substitute this expression for |a| into the equation for the magnitude of the third vector:
sqrt(a_y^2 + 7.1^2) = 2|a_x|
Simplifying this equation, we get:
sqrt(7.1^2) = 2|a_x|
7.1 = 2|a_x|
Dividing both sides by 2, we get:
3.55 = |a_x|

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In comparison to their neutral parent atom, anions are bigger and cations are smaller.

They are forced to spread out more due to electron-electron attraction. They can get closer to each other because there is less electron-electron repulsion.

Because cations contain fewer electrons than their parent atoms while maintaining the same nuclear charge, they are always smaller than those atoms. The leftover electrons are therefore held by the protons in the nucleus more tightly, and as a result, their radii are less than those of the parent atoms. With anion, this is the exact opposite.

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When a person with normal vision looks at an object 10m away, the image is formed clearly on the retina. The reason is that the eye has an optical power of 60 diopters. Therefore, a person with normal vision can see an object 10 meters away clearly.

Optical power refers to the ability of a lens to bend light. It is measured in diopters (D). The greater the diopter, the greater the lens's ability to bend light. The human eye's lens and cornea both contribute to its optical power.The cornea contributes around 43 diopters, while the lens contributes the remaining 17 diopters. The human eye's total optical power is usually about 60 diopters.A person with normal vision has an optical power of 60 diopters. When they look at an object 10m away, the image is formed clearly on the retina. The reason is that the eye has an optical power of 60 diopters.

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Since, s is both linearly independent and spans R3, we can say that s is a basis for R3. Additionally, we can say that s is a set of three linearly independent vectors in R3 that can be used to represent any vector in R3.

To determine whether s is a basis for R3, we need to check if s is linearly independent and spans R3.

First, we check for linear independence. We can set up the equation a(0,0,0) + b(6,4,3) + c(3,1,6) = (0,0,0) and solve for a, b, and c. This simplifies to the system of equations:
6b + 3c = 0
4b + c = 0
3b + 6c = 0

The only solution to this system is a = b = c = 0, which means that s is linearly independent.

Next, we check if s spans R3. This means that any vector in R3 can be expressed as a linear combination of the vectors in s.

Let (x,y,z) be an arbitrary vector in R3. We want to find scalars a, b, and c such that a(0,0,0) + b(6,4,3) + c(3,1,6) = (x,y,z). This simplifies to the system of equations:
6b + 3c = x
4b + c = y
3b + 6c = z

We can solve for b and c in terms of x, y, and z:
c = (2x - 3y)/3
b = (y - (2x - 3y)/3)/4 = (y - 2x + 3y)/12 = y/3 - x/6

Now we can express any vector (x,y,z) in R3 as a linear combination of the vectors in s:
(x,y,z) = a(0,0,0) + b(6,4,3) + c(3,1,6)
(x,y,z) = (y/3 - x/6)(6,4,3) + (2x - 3y)/3(3,1,6)

Since we can express any vector in R3 as a linear combination of the vectors in s, s spans R3.

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Part A. We are asked to determine the force exerted on a charge placed on point Z. To do that we will use the fact that charges with the same sign will attract each other and charges with a different sign will repel each other. Therefore, we can construct the following free body diagram:

Since q3 and q2 are both negative they repel each other and since q1 is positive this means that q3 and q1 will attract each other.

To determine the magnitude of the forces we will use Coulomb's law:

Where:

For the force between q1 and q3 we have:

For the force between q3 and q2 we have:

Now, the net force is the difference between F2 and F1 since the force act in different directions, therefore, we have:

we have taken the left direction to be negative and the right direction to be positive. Now, we substitute Coulomb's law:

We can take "kq3" as a common factor:

The distance from q1 to q3 is:

The distance from q2 and q3 is:

Now, we substitute the values:

Solving the operations:

Solving the operations:

Therefore, the net force is 1.63 Newtons to the right.

Part B. To calculate the electric potential energy we will use the following formula:

To determine the total energy we add the energy for both pairs of charges, like this:

We can take "kq3" as a common factor:

Now, we substitute the values:

Solving the operations we get

Therefore, the energy is 3.42 Joules.

Answer:ur mom

Explanation:because

Answer:

Light does not require any medium to travel because light is a transverse wave

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The terminal velocity depends directly on the drag force and the relationship between them is nonlinear.

The terminal velocity is the maximum velocity that a falling object can reach when the drag force of the surrounding fluid is equal to the gravitational force acting on the object. The drag force is dependent on the velocity of the object, and as the velocity increases, the drag force also increases.

However, the relationship between the drag force and velocity is nonlinear because the drag force is proportional to the square of the velocity. This means that as the velocity of the object increases, the drag force increases more rapidly. Therefore, the terminal velocity, which is the point at which the drag force balances the gravitational force, is reached when the nonlinear relationship between the drag force and velocity is balanced by the gravitational force.

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Answer:

5 ohms

Explanation:

V = IR

10 = 2 R

R = 5

The speed of the center of mass is 2.57 m/s.

The total kinetic energy (KE) of a system of particles can be expressed as:

KE = KEcm + KErel

where KEcm is the kinetic energy of the center of mass and KErel is the kinetic energy relative to the center of mass.

In this problem, we are given that the total mass (m) of the particles is 35 kg and the total kinetic energy is 378 J. We are also given that the kinetic energy relative to the center of mass is 80 J.

Using the formula for the kinetic energy relative to the center of mass:

KErel = (1/2)mv^2

where v is the speed of the center of mass.

Substituting the given values in the equation, we get:

80 J = (1/2)(35 kg)(v^2)

Simplifying and solving for v, we get:

v = sqrt((2*80 J) / (35 kg))

v = 2.57 m/s

The concept of the center of mass is important in understanding the motion of objects or systems of objects. It is the point in a system where the mass is concentrated and the system behaves as if all its mass is located at that point. The motion of a system can be described in terms of the motion of its center of mass.

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Answer:

002 bc eause iy is

The maximum current in a JFET (junction field-effect transistor) is defined as I_dss and occurs when V_gs (gate-to-source voltage) is equal to the pinch-off voltage.

The JFET is a three-terminal semiconductor device commonly used for amplification and switching purposes. It operates based on the control of current flow through a channel by varying the voltage applied to the gate terminal.

The maximum current in a JFET, also known as the drain-to-source saturation current (I_dss), is the maximum current that can flow Operational Amplifier through the channel when the JFET is fully on or saturated. It occurs when the gate-to-source voltage (V_gs) is equal to the pinch-off voltage.

The pinch-off voltage is the threshold voltage at which the JFET channel becomes completely depleted of charge carriers, resulting in a high-resistance state. When the gate voltage exceeds the pinch-off voltage, the channel opens up, allowing current to flow more freely.

Therefore, to achieve the maximum current in a JFET, the gate-to-source voltage must be set to the pinch-off voltage. Operating the JFET beyond this voltage will not further increase the current, as the channel is already fully open.

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Answer:

The half-life of a radioactive isotope is the time such that the initial amount of the isotope is reduced to its half.

Thus, if we start with A grams of a given radioactive isotope, after a 1 half-life, we will have A/2 grams of the radioactive isotope.

In this case, we know that the sample has 110g of a radioactive isotope.

Then, after 1 half-life, we should have half of 110g, which is:

110g/2 = 55g

Then we should have 55 g of a radioactive isotope.

The answer that is closer to this result is option d (50 g), so that is the correct one.

Answer:

is changing in direction, but constant in magnitude

Explanation:

This question is a bit tricky since the velocity of the satellite is changing, but the speed is constant.

Speed is simply a measure of how fast you are going. It doesn't matter where you're going, just how quickly.

Velocity, on the other hand, does care about which direction you're going. For example, it could be then when you travel right, your velocity is positive, and when you travel left, your velocity is negative. This is the similar for a 2D shape like a circular orbit

Since we know velocity is changing, there must be acceleration which changes that velocity (since acceleration is the change in velocity: going from 0 to 60 mph, for example)

Thus, with a non-zero net acceleration, we know that there must be a force that is changing in direction, but constant in magnitude (since the orbit is a circle, and always attracted to the center of the Earth at equal distance).

Answer:

Measurements and Units Accuracy, Precision, and Errors

Explanation:

this is A measurement is a quantitative observation that consists of two parts: a number and a unit.

Answer:

the level on the top

Explanation:

_+$+$

False. Fields, such as electric and magnetic fields, can be measured using instruments such as voltmeters and Gaussmeters.

Fields are a way of describing physical phenomena that occur in space. They are often used to describe the behavior of forces that exist between objects, even in the absence of direct physical contact between the objects.

Fields are described mathematically, and the mathematical equations that describe fields can be used to make predictions about how objects will interact with the field and how the field will change over time.

Fields also have motion in the sense that they can propagate through space and carry energy, such as in the case of electromagnetic waves. Additionally, fields can be influenced by other fields and can interact with charged particles, resulting in the motion of these particles in response to the field.

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The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is A m/C (ampere meter per coulomb). This unit represents the ratio between the electric field and the magnetic field, indicating the strength and direction of the electromagnetic field.

The SI unit of electric field (E) is NC^(-1) (newton per coulomb) and the SI unit of magnetic field (B) is NA^(-1) m^(-1) (tesla). To determine the unit of E/B, we need to divide the unit of E by the unit of B.

Dividing the unit of E (NC^(-1)) by the unit of B (NA^(-1) m^(-1)), we can simplify the expression:

E/B = (NC^(-1))/(NA^(-1) m^(-1))

To simplify this expression, we can cancel out the common units in the numerator and denominator:

E/B = (N/C)/(N/(A m))

Now, let's simplify further by dividing the numerator and denominator:

E/B = (N/C) * (A m/N)

Canceling out the common units:

E/B = (A m)/(C)

Therefore, the unit of E/B is A m/C (ampere meter per coulomb).

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Answer:

pressure = force ie 500 N divided by area ie 0.05m².

p=f by a

p= 500n divided by 0.05 m²

p= 10,000 pascal

If the starter motor of a car engine draws a current of 150 a from the battery. the amount of charges that passes through the starter motor is 120C.

Using this formula to determine the amount of charges that passes through the starter motor

I = q/t

q= lt

Where:

L = Current = 150A

t = Starter motor = 0.8s

Let plug in the formula

q =150A × 0.8s

q =120C

Therefore we can conclude that the charges is 120C.

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Answer:

image distance = 40/13=3.08 cm

Explanation:

The relation of the object distance, image distance, and the focal length of a lens.

1/f =1/v -1/u

v = distance of the image from the lens.

u = distance of the object from the lens.

f = the focal length of the lens.

therefore,

1/5= 1/v -1/8

1/5+1/8=1/v

(8+5)/40=1/v

13/40=1/v

v=40/13 cm

v=3.08 cm