Waldo gets stopped by the police.

True - Because a sound wave carries energy; to propagate energy, energy must be applied for the sound wave to carry energy.

Answer:

A scalar quantity is a quantity that has magnitude but does NOT have direction. An example is speed.

While a vector quantity is a quantity that has BOTH magnitude and direction. For example, force.

Answer:

so therefore, the comb gains electron and the hair losses electrons

Explanation:

It is known that electron contain a negative charge.

So, when an atom gain electrons then number of electrons within the atom increases. As a result, the atom acquires a negative charge.

But when an atom loses electrons, there will be deficiency of electrons within the atom. As a result, the atom becomes positively charged.

Hence,, when people use plastic combs on their hair, the combs become negatively charged. The situation which is true about this is the comb gains electrons and the hair loses electrons.

The factors influencing the rate of chemical reaction are concentration of the reactant,Surface area and physical condition of the reactants, Temperature, and catalyst.

One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.

Following are the factors Influencing the rate of chemical reaction;

1. Concentration of the reactant.

The reaction is usually accelerated by increasing the concentration of one or more reactants. This occurs because a higher concentration of a reactant results in more collisions with that reactant in the same amount of time.

2. Surface area and physical condition of the reactants.

The pace of reaction is limited by the surface area of the in contact phases if reactant molecules reside in different phases, as in a heterogeneous mixture.

3. Temperature.

The rate of reaction is typically accelerated as the temperature rises. As the temperature rises, the average kinetic energy of the reactant molecules increases.

4. Catalyst

A catalyst is a substance that aids in the process without being ingested.

Catalysts provide a second reaction pathway for the production of goods. They play a crucial function in a variety of biological processes.

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Answer:

equal

Explanation:

If all three corresponding sides are equal and all three corresponding angles are identical in measure, two triangles are said to be congruent. These triangles can be slides, rotated, flipped and turned to be looked identical. If repositioned, they coincide with each other. The symbol of congruence is' ≅'.

Congruent means equal, as it is a term used to describe two or more objects or figures that have the same shape and size.

When two or more figures or things have the same size and shape, they are said to be congruent.

When we state that two things or figures are congruent, we mean that their lengths, angles, and proportions are all the same.

The idea of congruence is that there should be no distinction or contrast between the things being compared. It denotes complete equality and a perfect match.

Congruence informs us that all geometric shapes, including line segments, angles, triangles, and others, are the same and can be placed on one another without overlap or gaps.

Thus, a fundamental idea in geometry called congruence enables us to evaluate and contrast geometric forms and their characteristics.

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Answer:

1/i + 1/o = 1/f     thin lens equation

i = 33 * 8.9 / (33 - 8.9) = 12.2 cm  to right of first lens

27 - 12.2 = 14.8 cm to left of second lens

i = 14.8 * 8.9 / (14.8 - 8.9) = 22,3 cm to right of second lens

Answer:

Speed of Sound = 2D

Time

Where D is the depth of water

2D = Speed × Time

2D = 1450m/s × 0.6s

D = 1450m/s × 0.6s

D

Depth D = 870m

Answer:

q = 1

Explanation:

 q-3/10-(7/10)=0    

        3         7

(q -  ——) -  ——  = 0

       10     10

red having the frequency of 4.62 and at its limit 4.29 has the lowest frequency. It is the lowest before orange which has 5.00.

All of the following use subjective scoring EXCEPT Archery.

Subjective scoring is an important and powerful tool you can use to add assessment items that are not easily scored.

Archery is scored based on point values that is assigned to the rings made on the target. Others are not point scoring sports.

Thus, all of the following use subjective scoring EXCEPT Archery.

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Answer:

N1 Sin θ1 = N2 Sin θ2        Snell's Law

For blue light

Sin θ2 = N1 / N2 sin 35.8 = 2.444 / 1.531 * .5850 = .9339

θ2 = 69.04 deg

For red light

Sin θ2 = 2.410 /1.520 * .5850 = .9275

θ2 = 68.05 deg

The separation is .01 deg

Mass is not necessary the main thing we need is Displacement

As

Or

The amount of work done is calculated as the force exerted to remove a object to D distance .

Answer:

411.37 meters

Explanation:

car position = 60 + 30 t

cop position = 1/2 a t^2 =   3 t^2     equate them

30t + 60 = 3t^2      re-arrange

3t^2 - 30t - 60 = 0    use quadratic formula to find t = 11.71 sec

1/2 (6)(11.71)^2 = 411.37 meters

Answer:

Okay

It is electric charge

Answer:

because the book's is covered by papers

Owing to the fact that the speed of the cars  did not change, the momentum of the objects will not change.

Momentum refers to the product of mass and velocity. According to the laws of conservation of linear momentum, momentum is conserved before and after collsion.

Owing to the fact that the speed of the cars  did not change, the momentum of the objects will not change after collsion even thpough momentum is conserved.

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Answer:

Explanation:

s = ut+ 0.5at²

u = 0

t = 6

a = 9.81

s = 0 + 0.5 * 9.81 * 36 = 176.58 m

v = u + at

v = 9.81* 36 = 353 m/s

Answer:

64 412 .88 N

Explanation:

F = ma

  = 3864 kg * 16.67 m/s^2 = 64412.88 N

Answer:

Both potential energy and kinetic energy are involved.

Explanation:

As the car is rolling, its potential energy decreases and its kinetic energy increases.

Answer:

solution here

The correct anwer isB .

Answer:

Have the same speed.

Explanation:

All electromagnetic waves travel at the same speed, which is 300,000,000 m/s.

Answer:

educated guesses about the outcome of an experiment

Answer:

The wire must be part of a closed circuit.

Explanation:

A closed circuit in electric is what we called a wire that has a complete electrical connection in which electricity flows, where electric current flow from one end to another, in order for magnetism to induce an electric current the circuit has to be closed, or no current will flow.

Answer:

Displacement will be 5m west

Distance would be 21m No direction

Answer: ??? D? dont quote me on it tho <3

Explanation:

Answer:

B

Explanation:

Answer:

As the kinetic energy increases, temperature also increases

Answer:

Approximately [tex]0.253\; {\rm J \cdot g^{-1} \cdot K^{-1}}[/tex] assuming no heat exchange between the mixture and the surroundings.

Explanation:

Consider an object of specific heat capacity [tex]c[/tex] and mass [tex]m[/tex]. Increasing the temperature of this object by [tex]\Delta T[/tex] would require [tex]Q = c\, m \, \Delta T[/tex].

Look up the specific heat of water: [tex]c(\text{water}) = 4.182\; {\rm J \cdot g^{-1} \cdot K^{-1}}[/tex].

It is given that the mass of the water in this mixture is [tex]m(\text{water}) = 1.00 \times 10^{2}\; {\rm g}[/tex].

Temperature change of the water: [tex]\Delta T(\text{water}) = (45 - 35)\; {\rm K} = 10\; {\rm K}[/tex].

Thus, the water in this mixture would have absorbed :

[tex]\begin{aligned}Q &= c\, m\, \Delta T \\ &= 4.182\; {\rm J \cdot g^{-1}\cdot K^{-1}} \\ &\quad \times 1.00 \times 10^{2}\; {\rm g} \times 10\; {\rm K} \\ &= 4.182 \times 10^{3}\; {\rm J}\end{aligned}[/tex].

Thus, the energy that water absorbed was: [tex]Q(\text{water}) = 4.182 \times 10^{3}\; {\rm J}[/tex].

Assuming that there was no heat exchange between the mixture and its surroundings. The energy that the water in this mixture absorbed, [tex]Q(\text{water})[/tex], would be the opposite of the energy that the metal in this mixture released.

Thus: [tex]Q(\text{metal}) = -Q(\text{water}) = -4.182 \times 10^{3}\; {\rm J}[/tex] (negative because the metal in this mixture released energy rather than absorbing energy.)

Mass of the metal in this mixture: [tex]m(\text{metal}) = 3 \times 1.00 \times 10^{2}\; {\rm g} = 3.00 \times 10^{2}\; {\rm g}[/tex].

Temperature change of the metal in this mixture: [tex]\Delta T(\text{metal}) = (100 - 45)\; {\rm K} = 55\; {\rm K}[/tex].

Rearrange the equation [tex]Q = c\, m \, \Delta T[/tex] to obtain an expression for the specific heat capacity: [tex]c = Q / (m\, \Delta T)[/tex]. The (average) specific heat capacity of the metal pieces in this mixture would be:

[tex]\begin{aligned}c &= \frac{Q}{m\, \Delta T} \\ &= \frac{-4.182 \times 10^{3}\; {\rm J}}{3.00 \times 10^{2}\; {\rm g} \times (-55\; {\rm K})} \\ &\approx 0.253\; {\rm J \cdot g^{-1} \cdot K^{-1}}\end{aligned}[/tex].

Resistance in the wire increases when the temperature of the wire is increases.

Heating the metal conductor causes atoms to vibrate more that makes more difficult for the electrons to flow through the conductor and thus increasing resistance.

So we can conclude that resistance in the wire increases when the temperature of the wire is increases.

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