the demand curve for bonds has the usual downward slope, indicating that at prices of the bond, everything else equal, the is higher. group of answer choices lower; quantity demanded higher; demand higher; quantity demanded lower; demand

Answer:

When forces on an object are balanced, there is no change in speed or direction. So what do you need to do to move something? If something starts to move, it must be because unbalanced forces are acting on it.

Answer: 0.308

Explanation:

acellus

Animals eat seeds, then those seeds are spread by animals.

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Answer:

D. Protons, atoms, rock particles, bricks, buildings

Explanation:

The correct sequence that shows the units of matter from smaller to largest is option A, protons, atoms, rock particles , bricks and buildings.

The basic units of matter is called atoms. These atoms are made of subatomic particles namely, protons, electrons and neutrons. The protons and neutrons  are located inside nucleus and the electrons are revolving around.

Every substance in the universe are made of atoms. Atoms of different elements combines to form compounds. Different  solid compounds and molecules deposits to forms rocks.

Rocks can be molded to bricks and other shapes they are then used to construct buildings. Therefore, the correct sequence of the units of matter from smallest to largest is protons, atoms, rocks, bricks and buildings.

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Answer:

The correct option is;

The assertion is correct, but reason wrong

Explanation:

The question is with regards to the relationship between work, energy, power, and velocity

The mass of each of the persons running up the staircase = Different

The time it takes each person to run up the stairs = Equal time

Let, 'm₁' and 'm₂' represent the mass of each of the persons that ran up the stairs and m₁ > m₂

Let 't' represent the equal time it takes then to run up the stairs

Let 'h' represent the height of the stairs

The energy, 'E', it takes to run up the stairs is equal to the potential energy, P.E., obtained at the top of the stairs

P.E. = m·g·h

Where;

m = The mass of the person at an elevated height

g = The acceleration due to gravity = Constant

h = The height reached above ground level

Given that the height reached is the same for both of the persons, we have

For m₁, P.E.₁ = m₁·g·h and for m₂, P.E.₂ = m₂·g·h

Therefore, where, m₁ > m₂, we have;

P.E.₁ > P.E.₂

∴ E₁ > E₂

Power, 'P', is the rate at which energy is expended

∴ Power, P = E/t

∴ P₁ = E₁/t  > P₂ = E₂/t

Therefore, the person with the greater mass, 'm₁', uses more power than the person of mass 'm₂', in running up the stairs

Therefore, the assertion is correct

The average velocity, vₐ = (Total distance traveled, d)/(Total time taken, t)

Given that the distance, 'd', covered in running up the stairs by both persons is the same, and the time it takes them to complete the distance, 't', is also the same, we have;

The average velocity of the person with the greater mass m₁ is the same as the average velocity of the person with mass, m₂

Therefore, the reason is wrong

The answer is that the assertion is correct, but reason wrong

The sign of the estimate of the area under the curve using left or right endpoints cannot be determined if f is not known to be increasing or decreasing on [a, b].

1. Using left endpoints would give an overestimate of the area under the curve on this interval.

2. Using right endpoints would give an underestimate of the area under the curve on this interval.

3. Using right endpoints would give an overestimate of the area under the curve on this interval.

4. Using left endpoints would give an underestimate of the area under the curve on this interval.

5. If f is not known to be increasing or decreasing on [a, b], it is not possible to determine the sign of the estimate of the area under the curve using left or right endpoints.

Suppose f is increasing on the interval [a, b] and we want to estimate the area under the curve on this interval. When using the left-hand endpoint, the rectangles will be above the curve if the curve is concave down, which will overestimate the area. When using the right-hand endpoint, the rectangles will be below the curve if the curve is concave down, which will underestimate the area. When using the left-hand endpoint, the rectangles will be below the curve if the curve is concave up, which will underestimate the area. When using the right-hand endpoint, the rectangles will be above the curve if the curve is concave up, which will overestimate the area.

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Answer:

 its not long dummy, its your imagination

Explanation:

Answer:

Gravity

Explanation:

The frictional force exerted by the bullet on the tree is approximately 10,142.49 N

We can calculate the force using the formula: F = K/d

where d is the distance over which the frictional force acts, which in this case is the depth to which the bullet penetrates the tree.

F = (493.57 J)/(0.0486 m)

F = 10,142.49 N

The force that prevents an object from moving when it comes into contact with another object is known as the frictional force. It occurs as a result of objects' surface irregularities, which cause them to resist movement when in contact with one another.

How much frictional power relies upon a few elements, for example, the idea of the surfaces in touch, the power squeezing the items together, and the speed at which they move comparative with one another. In mechanics, engineering, and materials science, among other fields of physics, the frictional force is an essential phenomenon.

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NOT an event horizon is its binary counterpart, which transports matter to it.

To refer to the item or person that is the target of an action, we typically use the word "object." Alternatively, the recipient. In a sentence, a verb's action is transferred to a noun or pronoun as a direct object. It typically responds to the what- or whom-questions regarding the verb.

Icons, cursors, buttons, sprites, and other complicated artworks can be made from a collection of simple visual pieces called image objects. Without having to sketch a single pixel, Image Objects let you express creativity.

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To find the speed based on the position function, you have to derivate the function in terms of time (x)

To find Vy and ay when y = 4RE, we need to differentiate the expression for y(t) with respect to time (t).

Given:

y(t) = (RE^(3/2) + (3√g/2)RE^t)^(2/3)

RE = radius of the Earth = 6.38 x 10^6 m

g = acceleration due to gravity = 9.81 m/s^2

First, let's find Vy by differentiating y(t) with respect to t:

Vy = dy/dt.

Taking the derivative of y(t) with respect to t, we get:

dy/dt = (2/3) * (RE^(3/2) + (3√g/2)RE^t)^(-1/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t].

Now, let's find ay by differentiating Vy with respect to t:

ay = dVy/dt.

Taking the derivative of Vy with respect to t, we get:

dVy/dt = d^2y/dt^2 = -(2/3) * (RE^(3/2) + (3√g/2)RE^t)^(-4/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t]^2 + (2/3) * (RE^(3/2) + (3√g/2)RE^t)^(-1/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t * (3√g/2)RE^t * ln(RE) + (3√g/2)RE^t * ln(RE) + (3√g/2)RE^t].

Now, substitute y = 4RE into the expressions for Vy and ay:

Vy = (2/3) * (RE^(3/2) + (3√g/2)RE^t)^(2/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t],\

ay = -(2/3) * (RE^(3/2) + (3√g/2)RE^t)^(-4/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t]^2 + (2/3) * (RE^(3/2) + (3√g/2)RE^t)^(-1/3) * [(3√g/2)RE^t * ln(RE) + (3√g/2)RE^t * (3√g/2)RE^t * ln(RE) + (3√g/2)RE^t * ln(RE) + (3√g/2)RE^t].

Note that the expressions for Vy and ay are in terms of t. To evaluate them when y = 4RE, we need to find the corresponding value of t using the expression for y(t).

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cloud?? thats prob wrong lol

Answer:

a shadow a cloud i dont really know

In spiral galaxies, the orbital speeds of stars and other celestial objects change as you move farther away from the center. This phenomenon is described by what is known as the "rotation curve" of a galaxy.

According to the predictions of classical mechanics and Newtonian gravity, the orbital speeds of objects in a galaxy should decrease as you move away from the center. However, observations of spiral galaxies have shown that the orbital speeds remain relatively constant or even increase with increasing distance from the center. This means that stars and gas in the outer regions of a galaxy are moving at unexpectedly high speeds.

The observed flat or increasing rotation curves indicate that there must be additional mass present in the outer regions of the galaxy, beyond what can be accounted for by the visible matter (stars, gas, and dust). This discrepancy between the predicted and observed orbital speeds provides evidence for the presence of dark matter in spiral galaxies.

Dark matter is a hypothetical form of matter that does not emit, absorb, or reflect light, making it invisible to traditional astronomical observations. Its presence is inferred through its gravitational effects on visible matter.

In the case of spiral galaxies, the gravitational influence of dark matter is believed to contribute significantly to the total mass of the galaxy, extending beyond the visible disk. The extra mass provided by dark matter helps explain the observed high orbital speeds in the outer regions of the galaxy.

By studying the rotation curves of spiral galaxies, scientists can estimate the distribution of dark matter within them. Various models and simulations have been developed to describe the distribution and properties of dark matter in galaxies, with the aim of better understanding its nature and its role in the formation and evolution of galaxies.

It's important to note that while the evidence for dark matter is compelling, its exact nature and composition remain unknown. Scientists continue to conduct research and experiments to further investigate the properties and origin of dark matter.

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Explanation:

M1U1+m2u2 = (m1+m2)vf

m1= 10kg

u1=5

m2=25

u2=0

vf=?

10×5+25×0=35 vf

50+0=35Vf

Vf=1.4m/s

Explanation:

1st- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. 

2nd- states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. (most important law)

3rd- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. (law of action/reaction)

The time interval required to bring the water to its boiling point is 2.50 seconds. The energy incident on the absorbing plate is the same as the energy focused by the mirror. Since the mirror focuses the Sun's rays onto the absorbing plate, we can assume that the energy incident on the absorbing plate is equal to the energy incident on the mirror.

First, let's calculate the amount of energy absorbed by the water. We are given that 40.0% of the energy is absorbed.

Therefore, the absorbed energy is 40.0% of the total energy.

Next, let's determine the total energy incident on the absorbing plate. We are not given the power of the Sun's rays, but we are given the diameter of the circular mirror, which is 1.00 m.

From the diameter, we can calculate the radius of the mirror, which is half the diameter.

The radius of the mirror is 1.00 m / 2 = 0.50 m.

Now, let's calculate the area of the mirror using the formula for the area of a circle:
Area = π * radius^2

Substituting the values, we have:
Area = π * (0.50 m)^2
Area = 0.785 m^2

So, the energy incident on the absorbing plate is the same as the energy incident on the mirror, which we can calculate using the formula:
Energy = power * time

Since we are looking for the time interval, we can rearrange the formula to solve for time:
Time = Energy / power

Since the energy absorbed is 40.0% of the total energy, we can write:
Time = (0.40 * Total energy) / power

To find the total energy, we need to calculate the power incident on the mirror.
The power incident on the mirror is the energy incident per unit time.

Therefore, we need to divide the total energy by the time interval.

We are not given the total energy or the time interval, but we are given the volume of water and its initial temperature.

We can use the formula:
Energy = mass * specific heat * change in temperature

where the mass is the volume of water multiplied by its density, and the specific heat is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius.

The specific heat of water is approximately 4.18 J/g°C.

The density of water is 1.00 g/mL, and the volume is given as 1.00 L.

Therefore, the mass of the water is:
Mass = volume * density
Mass = 1.00 L * 1.00 g/mL
Mass = 1000 g

Now, let's calculate the change in temperature. The boiling point of water is 100.0°C, and the initial temperature is 20.0°C.

Therefore, the change in temperature is:
Change in temperature = final temperature - initial temperature
Change in temperature = 100.0°C - 20.0°C
Change in temperature = 80.0°C

Substituting the values into the energy formula, we have:
Energy = mass * specific heat * change in temperature
Energy = 1000 g * 4.18 J/g°C * 80.0°C
Energy = 334,400 J

Now, let's calculate the power incident on the mirror. We need to divide the total energy by the time interval.

Since we are looking for the time interval, we can rearrange the formula to solve for power:

Power = Energy / time
Substituting the values, we have:
Power = 334,400 J / time

Since the energy absorbed is 40.0% of the total energy, the absorbed energy is:
Absorbed energy = 0.40 * 334,400 J
Absorbed energy = 133,760 J

Now, let's substitute the absorbed energy and the power incident on the mirror into the time formula:
Time = (0.40 * 334,400 J) / (334,400 J / time)

Simplifying the equation, we have:
Time = 0.40 * time

Dividing both sides of the equation by 0.40, we get:
Time / 0.40 = time
1 / 0.40 = time
2.50 = time

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Answer:

b. A steel paper clip near a magnet

Explanation:

A steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

A magnetic domain is a part or region within a magnetic substance in which the magnetization is present in a uniform direction.

So we can conclude that a steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

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Kinetic friction force, or f k = k F N = 3.1N, is the amount of frictional force acting on the block.

Static friction is the friction that exists between two systems when they are in contact and immobile with respect to one another. Kinetic friction is the term for the resistance that exists between two systems while they are in contact and moving in relation to one another.

Either static or kinetic friction We decide on +x right and +y up. Applying Newton's second law to these axes:

F−f=ma

 P+F n −mg=0

where F=6.0 N and m=2.5 kg is the mass of the block.

          F N =(2.5kg)(9.8m/s 2 )–10N=14.5N.

This implies ,fs, max =μ s F N=6.6N, which is larger than the 6.0N rightward force. The block, which was previously at rest, stays in place as a result.

Putting a = 0

f=P=6.0 N is the static friction force that results from plugging the first of our equations above.

This suggests that, fs, max = s F N =5.8N, which is smaller than the 6.0 N rightward

force, which causes the block to move. Therefore, we are working with kinetic data instead of static data.

Eq. reveals that friction is f k = k F N =3.6 N.

which (as expected) is less than the 6.0 N rightward force. Thus, the block moves. The kinetic friction force, then, is f k =μ k F N =3.1N.

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(a) The instantaneous source voltage can be determined by using the given magnitude and phase angle. Since the phase angle is 0°, the instantaneous source voltage can be written as:

V(t) = 277 * cos(2π * 60 * t)

(b) For a 30-Ω resistor, the current entering the positive terminal is the same as the source current. Since the voltage and resistance are given, we can use Ohm's law to determine the current:

I(t) = V(t) / R = (277 * cos(2π * 60 * t)) / 30

(c) For a 15-mH inductor, the phasor current can be determined using the formula:

I = V / jωL

where j is the imaginary unit (√(-1)), ω is the angular frequency (2π * frequency), and L is the inductance. In this case, ω = 2π * 60 and L = 15 * 10^(-3):

I = (277 ∠0°) / (j * 2π * 60 * 15 * 10^(-3))

To find the instantaneous current, we can take the real part of the phasor current and then convert it to the time-domain using cosine function:

I(t) = Re(I * e^(jωt))

(d) For a capacitor with 100 mF, the phasor current can be determined using the formula:

I = jωCV

where C is the capacitance. In this case, ω = 2π * 60 and C = 100 * 10^(-3):

I = (j * 2π * 60 * 100 * 10^(-3)) * 277 ∠0°

To find the instantaneous current, we can take the imaginary part of the phasor current and then convert it to the time-domain using sine function:

I(t) = Im(I * e^(jωt))

The magnitude of the average induced emf and average induced current in a coil. The magnitude of the average induced emf is 2.2 volts and the average induced current is 0.45 amperes when the coil resistance is 4.9 Ω.

Determining the magnitude of induced emf:

The emf induced in a circuit when there is a change in magnetic flux associated with the circuit is known as the induced emf. Faraday's law of electromagnetic induction explains the origin of induced emf. The magnitude of the induced emf is equal to the magnitude of the time rate of change of the magnetic flux.

Average induced emf = [(2) * π * R2 - π * R1]/t Where R2 = 9 cm, R1 = 2.7 cm, and t = 0.45 s.

Average induced emf = [(2) * π * (0.09)2 - π * (0.027)2]/0.45

Average induced emf = 2.2 V

The magnetic field in the loop is perpendicular to the plane of the loop, and the direction of the magnetic field is inward. When the loop is compressed, the magnetic flux in the coil decreases as the area of the loop decreases. The direction of the induced current is such that it opposes the reduction in magnetic flux, and by Lenz's law, the current will flow clockwise.

Using Ohm's law, the average induced current in the coil is:

Average induced current = Average induced emf/Resistance = 2.2/4.9 = 0.45 A

Therefore, the average induced current in the coil is 0.45 amperes.

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Answer:

found online

Explanation:

First write the symbol of the element that has the positive oxidation number or charge. Second, write the symbol of the element with the negative oxidation number. Lastly, find the least common multiple of the charges of each ion.

Answer:

4 J

Explanation:

From the image attached, we can see 2 horizontal forces acting on the box albeit in opposite directions.

Now, the net force will be;

F_net = 3 - 1

F_net = 2 N

To move a distance of 2 metres, kinetic energy is;

K.E = Force × Distance = 2 × 2 = 4 J

Answer:

A

Explanation:

Answer:

electric field must not exceed 5000 V / m  ( 5 kV/m)

Explanation:

All electrical equipment produces electric and magnetic fields that must be within the range recommended by WHO, the upper limit for the sum of all fields is

  The electric field must not exceed 5000 V / m

to get an idea of ​​the intensity produced by one of the devices that has the largest electric field in the radio with 180 V / m

Answer

Answer:

Explanation:

See attachment.

a  NO - it depends on distance between the masses, also.

The gravitational force between two objects depends only on their masses.

b  YES - see attachment

The gravitational force between two objects increases if the mass of one object increases.

c. No - it decrease

The gravitational force between two objects increases if the distance between the objects decreases.

d. It appears the answer is incomplete (stops at . . ., no . . ).  Otherwise I say YES.

Any two objects that have mass also have a force of gravity acting between them, no

"In the given scenarios of energy transformation, chemical energy inside the muscles is converted into kinetic energy."

According to the principle of energy conservation, energy can only be changed from one type into another. It cannot be demolished.

When we strike a golf ball, the kinetic energy of the golf club is created by the swing of the club, which is created by the chemical energy stored inside our muscles. The ball acquires kinetic energy and begins to move when this golf club, which has kinetic energy, strikes it.

Chemical energy from our bodies is transformed into kinetic energy of the tennis racket when we strike a tennis ball, and kinetic energy of the racket is transferred to the ball and transformed into kinetic energy of the ball when we hit the tennis ball with the racket.

When we shoot a basket, we use chemical energy that has been stored in our muscles to generate a force that pushes the basketball, which transforms chemical energy that has been stored in our body into kinetic energy of the basketball.

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Explanation:

I think the total resistance of the resistors is 1 ohm . it is also known as equivalent resistance.

hope it helps.

The fur of a sea otter is the densest of any animal, having the most hairs per square inch of any other species. Even while floating in the water, their thick fur keeps the animal warm and dry.

Sea otters decrease heat loss when the water is too cold by floating on their backs with their feet out of the water. To increase their surface area when trying to dissipate heat, sea otters spread their feet out underwater. Sea otters typically spread out or tuck their feet up to maintain body heat. The amount of food available to sea otters would decrease if prey species in their environment declined as a result of changing temperatures.

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