Select all the correct answers.
Which three of the following describe key aspects of hydroelectric power generation systems?

A)located in areas of low elevation

B)harness kinetic energy of moving water

C)utilize steam to drive electrical generator

D)utilize dams to hold back water until needed

E)store captured water in large reservoirs

Answer:The answer is C

Explanation:

Answer:

Explanation:

I'll do this in both meters and feet, since you don't specify which you need. Since we are only dealing in the y-dimension:

Δx = ???

a = -9.8 m/s/s

v₀ = 0

t = 16 sec

In the equation:

Δx = v₀t + \(\frac{1}{2}at^2\) we fill in accordingly:

Δx = \(0(16)+\frac{1}{2}(-9.8)(16)^2\) which simplifies to

Δx = \(\frac{1}{2}(-9.8)(256)\) so

Δx = -1300 m. Now in feet, it's the same equation but the acceleration is -32 ft/s/s:

Δx = \(\frac{1}{2}(-32)(256)\) which is

Δx = -4100 ft (the negative signs here just indicate direction: the penny is this distance below the point from which it was dropped. So, obviously, to answer the question regarding the height of the building, you would say it was 1300 m high or 4100 feet high. The negative would be significant if we were asked instead "How far did the penny fall?" which would be the same answer to a slightly different question.)

Answer:

scalar Besause it has magnitude but no direction

Answer:

It has 2 uses

1. Polar bears have white fur so that they can camouflage into their environment. Their coat is so well camouflaged in Arctic environments that it can sometimes pass as a snow drift.

2. They have a thick layer of body fat, which keeps them warm while swimming, and a double-layered coat that insulates them from the cold Arctic air.

Answer:

Explanation:

3.011 x 10^24 atoms

Answer:

jskskskssksksksskssksksksksks

Given that the trench is 11.0 km deep and that saltwater has a constant density of 1029 kg/m3 throughout, the gauge pressure (in atm) due to the ocean at the bottom of the trench is 992.38 atm.

It is positive for pressures above atmospheric pressure and negative for pressures below atmospheric pressure; gauge pressure is the pressure as compared to atmospheric pressure. Any fluid that is not contained has its pressure increased by the atmospheric pressure. Density is defined as the ratio of mass to volume, or mass per unit volume. It is a way to quantify how much "stuff" an object has in relation to its volume (cubic metre or cubic centimeter). In essence, density is a measurement of how closely stuff is packed together.

P = 100552500/101325

P = 992.38atm

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Answer:

A hydrometer is an instrument used to determine specific gravity

Answer:

it is used determine specific gravity

Explanation:

and u can see them in use by measuring proof of moonshine

D. The reverse reaction to re-make ATP is called phosphorylation and can be represented by the following balanced equation: ADP + Pi + energy → ATP.

E. The exergonic reaction diagram represents the reaction in 1C. f. The endergonic reaction diagram represents the reverse reaction (phosphorylation) in 1D.

Exergonic is a reaction that releases energy to occur in anabolism, whereas endergonic is a reaction that requires energy to occur in catabolism. According to the second law of thermodynamics any reaction that occurs at constant temperature without input of electrical energy or photons is exergonic. An example is cellular respiration. An exergonic reaction is a chemical reaction in which the change in free energy is negative.

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Answer:

17.565 kgm/s

Explanation:

Momentum = mass × velocity

I = mv..................... Equation 1

But we can calculate the value of v  using the equation of motion under gravity.

v² =  u²+2gs............. Equation 2

Where u = initial velocity, s = maximum heigth, g = acceleration due to gravity.

Given: u = 0 m/s (at the maximum heigth), s = 7.0 m.

Constant: g = 9.8 m/s²

Substitute these values into equation 2

v² = 0²+ 2×7×9.8

v² = 137.2

v = √137.2

v = 11.71 m/s.

Also given: m = 1.50 kg

substitute these values into equation 1

Therefore,

I = 1.5×11.71

I = 17.565 kgm/s

The calculated distance is d = 0.544 m. We must work on this issue in two stages: the first when there is no friction on the surface, and the second when there is friction.

Find the speed at which the box travels starting with the component without rubbing.

When the box is free and at its maximum compression, respectively, we apply the conservation of mechanical energy for this (spring without compression) maximum initial compression

Em0 = Ke = 12 x k

Final, uncompressed box without spring compression

= K = ½ m v²

½ k x² = ½ m v²

v = √ (k / m) x

Let's focus on the second section, which has friction. The work of the friction force in this section equals the change in mechanical energy. Let's compute.

d = ½ 1,265² / (0.15 9.8) (0.15 9.8)

d = 0.544 m

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Answer:The resistance of a 24 W, 12 V filament lamp depends on the current flowing through the lamp. For currents up to 0.8 A, the resistance has a constant

Explanation:

Some of the most important elements in the internal environment of an organization are the organizational structure, the organizational culture, and the leadership style.

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Answer:

Explanation:

when a tree is shaken it's fruits and leaves fall down due to the gravitational force exerted by earth.

All fruits and leaves do not fall when tree is shaken, mostly only those fruits and leaves are fallen that are ripped.

It's because their tissues has become weak

The magnetic field outside the solenoid \(B_{\text {out }}\) is zero.

The magnetic field lines are present outside the solenoid, but there are significantly less of them there than there are inside the solenoid. This is known as the flux. As a result, the magnetic field outside is thought to be almost nil. It is more accurate to assume that the magnetic field outside the solenoid is zero if the solenoid is quite long. It is false close to the solenoid's edge. We consider the magnetic field outside the solenoid to be zero for practical purposes. This amount of flux divided by the area outside the solenoids gives the flux density, which is equal to the strength of the field outside the solenoid is zero.

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For a double-slit configuration where the slit separation is four times the slit width, the number of interference fringes that lie in the central peak of the diffraction pattern is 3.

This is because the number of bright fringes (interference fringes) that lie on either side of the central peak in a double-slit diffraction pattern is given by the equation:

nλ/d

where n is the order of the fringe, λ is the wavelength of the incident light, and d is the distance between the slits.

For the central peak, n is equal to zero, so the equation becomes:

0λ/d = 0

This means that there is no fringe at the center of the diffraction pattern.

However, there will be fringes on either side of the central peak, with the first order of bright fringe occurring at:

nλ/d = 1

where n = 1.

For a double-slit configuration where the slit separation is four times the slit width, the distance between the slits is 4w, where w is the width of each slit.

Therefore, the equation becomes:

nλ/4w = 1

nλ = 4w

This means that the first order of bright fringe will occur at a distance of 4w from the center of the diffraction pattern.

Similarly, the second order of bright fringe will occur at:

nλ/4w = 2n

λ = 8w

This means that the second order of bright fringe will occur at a distance of 8w from the center of the diffraction pattern.

Therefore, there will be a total of three interference fringes (bright fringes) in the central peak of the diffraction pattern.

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Answer:

300m/s/s

Explanation:

a=f/m

f=150N

m=.5kg

150/.5=300

Answer:

Draw a free body diagram of the object. Decide which direction is positive and which is negative. Subtract the forces in the negative direction from those in the positive direction. If the problem asks for it, use the net force to find mass or acceleration

Explanation:

Its just science

Tectonic plates, which are huge chunks of the lithosphere of the Earth, split farther apart during the volcanic process known as seafloor spreading. Rock is made once this bubbled-up lava is frozen in frigid seawater.

A lack of sexual pleasure, sometimes even to the point of an orgasm, is referred to as frigidity. It might be brought on by fear, an unresolved oedipal complex, rage, or sadness. When necessary, antidepressants taken in conjunction with psychotherapy are beneficial.

Your genital tissues & sexual receptivity may change as a result of lower oestrogen after menopause. A reduction in estrogen causes the blood flow to a pelvic area to diminish, which can reduce genital feeling and make it take longer to reach orgasm.

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The safest plays to play sprinting, tagging, and throwing the ball is d) a football field

A football/soccer field is a rectangular field surrounded by lines called perimeters. The two long lines are the touch lines and the two short lines are the goal lines. It is divided in half by the midline connecting the midpoints of the two contact lines. The field is 100 yards long, with 10-yard end zones for each team. The field has stripes across the width of the field at 5-yard intervals. The soccer field is 160 feet wide. The games that can be played on the football field are sprinting, throwing the ball, tagging, etc.

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(a) The time you spend waiting at station 1 before starting service on your car is the maximum of X1 and Y1. E[max{X2,Y1}] = E[X2|X2>Y1]P(X2>Y1) + E[Y1|Y1>X2]P(Y1>X2)= (1/l2)l1/(l1+l2) + (1/l1)l2/(l1+l2) = (l1+l2)/(l1l2).

b) the minimum of two exponentials is also an exponential with rate equal to the sum of the rates

E[T] = E[X1+X2+Y1+Y2]+E[Exp(l1+l2)] = (1/l1+1/l2+1/l1+1/l2) + 1/(l1+l2) = (2/l1+2/l2) + 1/(l1+l2)

c) .Using the values from the problem, we have

E[T] = (2/4+3/5) + 1/(4+5) = 1.624 seconds

1.) The time you spend waiting at station 2 after completing service on your car is the maximum of X2 and Y2.

Thus, the time you spend in the wash is

T = X1 + max{X2,Y1} + Y2.

To compute E[max{X2,Y1}], we need to find P(X2>Y1) and P(Y1>X2), and then use the formula

E[max{X2,Y1}] = E[X2|X2>Y1]P(X2>Y1) + E[Y1|Y1>X2]P(Y1>X2).

Since X2 and Y1 are exponentially distributed with rates l2 and l1, respectively, we have

P(X2>Y1) = l1/(l1+l2) and P(Y1>X2) = l2/(l1+l2).

Therefore,

E[max{X2,Y1}] = E[X2|X2>Y1]P(X2>Y1) + E[Y1|Y1>X2]

P(Y1>X2)= (1/l2)l1/(l1+l2) + (1/l1)l2/(l1+l2) = (l1+l2)/(l1l2).

(b) By part (a), we have

T = X1 + max{X2,Y1} + Y2.

Using the formula from the hint, we can write

max{X2,Y1} = X2 + Y1 - min{X2,Y1}.

Since the minimum of two exponentials is also an exponential with rate equal to the sum of the rates, we have

min{X2,Y1} ~ Exp(l1+l2).

Therefore,

T ~ X1 + X2 + Y1 + Y2 + Exp(l1+l2).

Using the linearity of expectation and the fact that the sum of two exponentials is also an exponential with rate equal to the sum of the rates, we have

E[T] = E[X1+X2+Y1+Y2]+E[Exp(l1+l2)] = (1/l1+1/l2+1/l1+1/l2) + 1/(l1+l2) = (2/l1+2/l2) + 1/(l1+l2).

(c) Using the values from the problem, we have

E[T] = (2/4+3/5) + 1/(4+5) = 1.624 seconds (approximately).

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While you push a box you begin to decrease the force you are exerting on the box. The box will reach static equilibrium when there is no net force applied to it in any direction.

Static equilibrium refers to the equilibrium that exists between two or more objects such that there is no net change in the position or direction of the object.

When an object is in static equilibrium, it remains in its position without moving even if a force is applied to it.

Examples of objects  in static equilibrium include:

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Answer:

I think the answer is C.

Explanation:

the verticale distance of a wave from its crest to its trough

Our resistance is four mega houses at two seconds. Simply enter 15 seconds as R times 150.50 times 10 to the negative six digits for the calculation. We therefore have 30 Mega Ohms.

It is required to wipe the screen of an automobile on a regular basis when there is a light drizzle, when it is dirty, or when any of these conditions exist. There is a switch that uses an electrical circuit to wipe the screen. A main-wiper control circuit system and a relay control circuit are components of an intermittent wiper system. The relay control circuit uses a transistor and diode combination in an RC circuit.

According to what we've been told, our RC circuit's capacitance is 0.5 micro Farads, or 0.5 times ten to the minus six Farads. The resistance times the capacitance produces the time constant. And by multiplying both sides by C, we may find R's value. And when the time constant is divided by the capacitance, which is equal to 0.5 times ten to the minus six Farads, we have the minimum resistance, which is equal to 4.00 Mega Ohms.

The maximum time constant divided by capacitance occurs when the resistance is at its maximum. As a result, when we replace tau with 15 seconds, we obtain 30.0 Mega Ohms. To modify the frequency of the wiper blades' oscillation, the resistance must be able to shift between four and thirty megaohms.

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Answer:

Reaction is 20N.

Explanation:

In general, Newton's third law of motion explains that when a force is applied on an object, a reaction of equal magnitude applies in the reverse direction of the force.

i.e F = -R

This implies that, reaction is a force in the opposite direction to that of the force applied.

Force can also be related to the weight of an object as;

F = W = mg

Thus to prevent the 20N stone from falling, a force of 20N is applied in the opposite direction. So the reaction, R is 20N.

Answer:

The energy efficiency represents the things you can do with some amount of energy, and if you can do more with less, than it reduces the energy consumption.

Explanation:

The answer to this question is actually very simple. Imagine that you use only the half of the energy you produce, an efficiency of 50%. Lets say you need 5kJ, so you would need to produce 10kJ, because you can consume only the half. Now, imagine you increase the efficiency, you use exactly what you can generate, (efficiency of 100%). In this case, if you needed only 5kJ you would need to generate only 5kJ.

Answer:

it is being accountable basically like some one can relive and trust that you'll do what you say your going to do

The order of the mass wasting processes from slowest to fastest velocity is as follows Solifluction Slump  Debris slide Rock fall

Solifluction is the slowest mass wasting process because it involves the gradual movement of soil and sediment due to the freezing and thawing of water in the ground. This movement is usually very slow and can take years to cause any significant damage. Slump is the second-slowest mass wasting process because it involves the gradual movement of soil and sediment down a slope due to the loss of internal support. This movement is usually faster than solifluction, but still relatively slow.

Debris slide is the third-fastest mass wasting process because it involves the sudden movement of soil, rock, and vegetation down a slope due to the failure of a slope or the saturation of the material with water. This movement is much faster than solifluction or slump. Rock fall is the fastest mass wasting process because it involves the sudden and rapid movement of large boulders and rocks down a steep slope due to the force of gravity.

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Answer: A.

current (thumb) to magnetic field (fingers)

Answer:

A. current (thumb) to magnetic field (fingers)

Explanation:

According to the Right-Hand Thumb rule, if we are holding a current- carrying straight conductor in our right hand such that the thumb points toward the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.

Hope it helps.

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