select the correct answer. which behavior of light makes it possible for you to see a spectrum of colors in a spray of water on a sunny day? a. diffusion b. reflection c. refraction d. dispersion

To prove that rock layers in one area match rock layers found in another area, geologists use the principles of stratigraphy, including fossil, lithologic, and chemical correlation techniques.

One way to prove that rock layers in one area match rock layers found in another area is by using the principle of stratigraphy, which is the study of rock layers (strata) and their relationships. Geologists can use several techniques to correlate rock layers between different locations, including:

Fossil correlation: If a particular fossil is found in two different rock layers at different locations, it is a good indicator that the layers are of the same age. This is because certain fossils only existed during specific time periods, and so if the same fossil is found in two different rock layers, it can be inferred that those layers were deposited during the same time period.

Lithologic correlation: Rocks can have unique characteristics that allow geologists to match them to other rocks of the same type. For example, sandstone can have unique grain sizes or shapes that can help identify it as coming from a specific location.

Chemical correlation: Some rocks have unique chemical compositions that can be used to match them to other rocks of the same type. For example, volcanic rocks can have unique isotopic signatures that can help identify them as coming from a specific volcano.

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Answer:

ok

Explanation:

Answer:

The change of movement depends on the force that acts and the length of time it acts.

The correct answer is a. 10 km/h.

b. The boat would move at 10 km/h at a 37-degree upstream angle to cross straight (into the current)

To be more precise, the rate of change in an object's position relative to a frame of reference and time is another way to describe velocity. It determines how quickly or slowly something is going. Consider a scenario in which there are two moving items. If both items are going in the same direction, it is simple to determine which one is moving faster than the other.

v = √v_x^2 +v_y^2

v = √((8 km/h)^2 + (6 km/h)^2)

=10 km/h

direction = θ = tan^-1 (opposite / adacrent)

= tan^-1 (6/8)

= tan^-1 (37)

= 37 degree down stream.

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Answer:

Specific activity is defined as the activity per quantity of atoms of a particular radionuclide. It is usually given in units of Bq/kg, but another commonly used unit of activity is the curie (Ci) allowing the definition of specific activity in Ci/g.

SI unit: becquerel

In SI base units: s−1

Other units: rutherford, curie

Answer:

Explanation:

c slowing down since the distance is going down and the time is moving up.

A) λ ≈ 1.6x10^-7 m; B) P ≈ 9x10^21 W; C) dm/dt = -kM^2, evaporation time ∝ M^3; D) Lifetime > age of universe, initial mass ≈ 1.8x10^5 kg.


A) Using the formula λ = h*c/(k_b*T), and the Schwarzschild radius formula R = 2*G*M/c^2, we find the wavelength λ ≈ 1.6x10^-7 m, which is much smaller than the black hole's size (R ≈ 3 km). B) Using the Stefan-Boltzmann law P = A*σ*T^4, we find the power P ≈ 9x10^21 W.

C) With dm/dt = -P/c^2, substituting for P, and noting that M and R are related, we find dm/dt = -kM^2. Integrating, we find the evaporation time is proportional to M^3. D) A 1-solar-mass black hole's lifetime is much longer than the universe's age. An evaporating black hole today had an initial mass of ≈ 1.8x10^5 kg.

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The resistivity of both the wires is same. The resistance of the second wire to the first is 1:2.

The resistivity of a material is a property that depends only on the material itself, and it is not affected by the dimensions or shape of the object made from that material. In this case, since both wires are made of copper, their resistivity will be the same.

However, you may be looking for the ratio of the resistance of the two wires, which does depend on their dimensions. The resistance of a wire can be calculated using the formula:

R = ρ * \(\frac{L}{A}\)
where R is the resistance, ρ is the resistivity, L is the length, and A is the cross-sectional area of the wire.

For the first wire, we have:

R1 = ρ * \(\frac{L}{A}\)

For the second wire, we have:

R2 = ρ * \(\frac{2L}{4A}\)

Now, let's find the ratio of the resistances R2 to R1:

\(\frac{R2}{R1}\) = (ρ * \(\frac{2L}{4A}\)) / (ρ * \(\frac{L}{A}\))

The resistivity, ρ, cancels out since it is the same for both wires:

\(\frac{R2}{R1}\) = \(\frac{2L}{4A}\) ÷ \(\frac{L}{A}\)

Now we can simplify the expression:

\(\frac{R2}{R1}\) = \(\frac{2L}{4A}\) * \(\frac{A}{L}\)

The L and A cancel out:

\(\frac{R2}{R1}\) = \(\frac{2}{4}\)

\(\frac{R2}{R1}\) = \(\frac{1}{2}\)

So the ratio of the resistance of the second wire to the resistance of the first wire is 1:2. Note that this is the ratio of the resistances, not the resistivities, which are the same for both wires.

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Of the forces present in the external environment, which is considered to be significantly uncontrollable are political forces, competition force. In physics, nuclear energy is uncontrollable.

The economy, politics, competitors, customers, and even the weather are all uncontrollable factors. the energies which are mentioned in the above part are the forces that are involuntary and voluntary both and can be controlled or cannot be controlled by our own means. we cannot tend to change it. the nuclear energy whereas is the energy that generally cannot be controlled and we have to make controls to take a control over it. this is involuntary and generally cannot be controlled. by this primary information, we can firmly conclude that of the forces present in the external environment, which is considered to be significantly uncontrollable are political forces, competition force. In physics, nuclear energy is uncontrollable.

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Answer:

90.0

Explanation:

Because 78.8329 + 3.179=83.0119

83.0119 + 6.5263=89.5382 rounded up is 90.0000

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Answer: 32 centimeters is 12.5984 inches

Explanation:

The additional distance the buoy will sink when an 80.0-kg man stands on top of it is approximately 0.122 meters.

To calculate the additional distance the buoy will sink when an 80.0-kg man stands on top of it, we will use Archimedes' principle and the concept of buoyancy.
First, we need to find the volume of the water displaced by the 80.0-kg man. We can use the following formula to calculate this volume:
Volume_displaced = (Mass_man / Density_water)
Density of seawater is approximately 1025 kg/m³, so:
Volume_displaced = (80.0 kg / 1025 kg/m³) = 0.0780 m³
Now, we will find the height (h) that the cylindrical buoy sinks. The volume of the cylinder can be expressed as:
Volume_displaced = π(Diameter² / 4) * h
We know the diameter (0.900 m) and the volume displaced (0.0780 m³), so we can solve for h:
0.0780 m³ = π(0.900 m² / 4) * h
Rearranging the equation and solving for h:
h = (0.0780 m³) / (π(0.900 m² / 4))
h ≈ 0.122 m
So, the additional distance the buoy will sink when an 80.0-kg man stands on top of it is approximately 0.122 meters.

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Answer:

A screw

Explanation:

The threads of a screw act like an inclined plane to increase the distance over which you exert the input force.

The magnitude of the elevator's acceleration is 18.25 m/s².

The acceleration of the elevator is calculated as follows;

R = Fa - Fg

R = ma - mg

R = m(a - g)

where;

m = W/g

m = (545 N) / (9.8 m/s²)

m = 55.61 kg

ma = R + mg

ma = R + W

a = (R + W) /m

a = (470 + 545) / 55.61

a = 18.25 m/s²

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The unit of a third-order reaction is mol-2L2s-1.

The total of the exponents that the concentration terms in the rate law are increased to determine the reaction's overall order. Take the products of the reaction aA+bB, for instance. Reactants A and B are in that sequence in the reaction, which is a and b, respectively. The reaction happens in the general order a+b.

The overall reaction sequence affects the units of the rate constant, k. M/s, 1/s, and 1/(Ms) are the units of k for zero-order reactions, first-order reactions, and second-order reactions, respectively.

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This motion of the balloon is an example of buoyancy, which is the upward force exerted by a fluid on an object immersed in it.

When the balloon is neutrally buoyant, it means that the weight of the balloon and the weights attached to it is equal to the weight of the water displaced by the balloon.

If you push the balloon down to a greater depth and then release it, the balloon will rise back up to its original position.

This is because the balloon is still partially inflated and contains air, which is less dense than water. When you push the balloon down, the water pressure compresses the air in the balloon, causing it to become smaller in size.

When you release the balloon, the compressed air expands and pushes the balloon upwards towards the surface of the water.

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Answer:

They will repell each other so they both will give lots of energy and the situation is exothermic.

Explanation:

Got it right

As two negative charges are moved closer together, the electrostatic potential energy between them increases.

This increase in potential energy occurs because the like charges repel each other, and as they move closer, the force of repulsion becomes stronger, resulting in a higher potential energy state.

Hence, As two negative charges are moved closer together, the electrostatic potential energy between them increases.

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A 3000 N heavy machine is supported on the a robust foundation. The machine's weight is found to cause a static displacement of the foundation.

Why is static important?

adjective Also called "statistical," this term refers to something that is fixed or stationary. exhibiting minimal or no change a static idea; a static connection. deficient in activity, growth, or vitality: Characterizations in the work were static, especially in regard to its main characters.

What is static, anyway?

An imbalance of electrostatic force within or on surface of a material, or between materials, results in static electricity. The charge persists until it can be expelled through an electrical discharge or current.

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Answer:

I think B) is uncorrect

Explanation:

As A) p=w/t so it's correct relation

C) power depend on time and work as work is distance multiple force so it refer to velocity

D) the powerful mean much work in a few time

Answer:

the answer is

D.refraction

Answer:

The second law of motion states that the force of an object is equal to its mass times its

acceleration.

o A change in motion occurs only if a net force is exerted on an object.

o A net force changes the velocity of the object, and causes it to accelerate.

o If an object is acted upon by a net force, the change in velocity will be in the

direction of the net force.

o The acceleration of an object depends on its mass.

o The more mass an object has or the more inertia it has, the harder it is to

accelerate.

o More mass means less acceleration if the force acting on the objects is the same.

Explanation:

Explanation:

The force exerted by the earth on a falling baseball is smaller than the force exerted by the earth on a falling bowling ball.  However, since the baseball has less mass than the bowling ball, the two accelerate at the same rate.  This is known as Galileo's gravity experiment, but it also demonstrates Newton's second law.

When a bowling ball hits a pin, the pin pushes back with equal and opposite force.  Because the bowling ball has a large mass, the acceleration caused by the force is small.  Since the pin has a small mass, the acceleration caused by the force is large.

Answer:

The school is 3.40 meters tall.

Explanation:

You need to equations to solve this question. You need to know the time it takes to reach the ground and the time it takes for the two observers to hear it. The distance in both cases is the same, so the two conditions can be equated to each other.

Equations.

d = the height of the buildings

a is the acceleration due to gravity and is a constant 9.8i1 m/s^2

t1 is the time it takes to hit the ground

The initial velocity = 0 because the rock was dropped

Equation One

d = vi*t + 1/2 a t^2

Equation Two

d = v * t2

v is the velocity of sound

t2 is the time it takes for the sound to come back from hitting the ground.

d is the height of the school

Solution

vi*t + 1/2 a t1 ^2 = v * t2

t2 = 0.81 - t1

The times are separate, but they add up to 0.81 so

t1 I+ t2 = 0.81

t2 = 0.81 - t1

Rewrite the equation putting in the givens. Remember vi = 0

1/2 9.81  t1^2 = 340 * (0.81 - t1)        Remove the brackets

4.91* t1^2 = 275.4 - 340 t1               Transfer the right side to the left

4.91*t1^2 + 340t1 - 275.4 = 0           Use the quadratic formula to solve

a = 4.91

b = 240

c = -275.4

t1 = (-240 +/- sqrt(240^2 - 4*4.91*-275.4))/(2*4.91)

t1 = .8007 = 0.80

t1 + t2 = 0.81

0.80 + t2 = 0.81 - 0.80

t2 = 0.01

What you have found is the time it takes for the sound to come back to the two observers which is 0.01 seconds

d(height of school) = 340 * 0.01 = 3.4 meters

No, there is no way the value of v can be large enough, even under idealized conditions (i.e., neglecting friction with the atmosphere).

Activate this post's status. It is common to use the example of a cannonball to illustrate Newton's third law. The justification is as follows: The cannonball experiences pressure from the cannon, and the cannonball experiences pressure from the cannon in the opposite direction.

The route taken by the cannonball in the animation is parabolic. The projectile accelerates downhill while it is falling. A projectile that is going downward and picking up speed is said to have a downward acceleration.

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Answer:

A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. This results in an electric current limited only by the Thévenin equivalent resistance of the rest of the network which can cause circuit damage, overheating, fire or explosion.

hope it helps.Please give me brainliest O:-)

Answer:

A short circuit is an electrical circuit that allows a current to travel along an unintended path with no or very low electrical impedance.

To calculate the magnitude of the force that would exactly counterbalance these three forces, we need to use the principle of vector addition. This involves combining the three forces vectorially to find the net force acting on the object.

First, we need to find the resultant of the two forces that are at an angle of 90 degrees to each other. This can be done using the Pythagorean theorem:

Resultant = √(25² + 12²) = √(625 + 144) = √769 = 27.74 N

Next, we need to find the net force acting on the object by adding the third force (4 N) to the resultant of the first two forces (27.74 N).

Net force = 4 N + 27.74 N = 31.74 N

Therefore, the magnitude of the force that would exactly counterbalance these three forces is 31.74 N.

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for each of them you need to type how they make you feel when you like need to make decision

Explanation:

Answer:

Mass will not change based on location, while weight will change based on gravitational pull.

Explanation:

The formula for weight is mass*gravitational pull, hence weight changes based on gravitational pull

Mass will not change based on location, while weight will change based on gravitational pull. This is a true statement about mass and weight.

The most fundamental characteristic of matter is mass, which is one of the fundamental quantities in physics. Mass is a term used to describe how much matter is there in a body. The kilograms is the SI unit of mass (kg). A body's mass remains constant at all times.

The amount of weight t indicates how much gravity is pulling on a body. The weight formula is provided by: w = mg

Weight being a force The SI unit of weight is the Newton, which is also the same as the SI unit of force (N). When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity; while the mass may not change from one location to another, the acceleration caused by gravity does.

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Dalton's atomic theory is related to the characteristics of atom. The statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

The Dalton's theory states that All matter is composed of extremely small particles called atoms and Atoms of a given element are identical in size, mass, and other properties. Atoms of different element are different.

Hence, the statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

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