The wolves and moose of Isle Royale are the focus of the longest-running study of a predator-prey system in the wild. Both are recent arrivals to Isle Royale: moose swam to the island in the early 1900’s. Wolves followed decades later, traveling over the ice from Canada in the 1940’s.About 40 years into the study, the wolf population crashed when humans introduced the canine-parvovirus. Additional factors over the years have impacted both populations. At one point during the study, the moose population collapsed during the most severe winter on record followed by an outbreak of moose ticks. What point on the graph represents the outbreak of moose ticks and a drastic decline in the moose population?
A) Point A
B) Point B
C) Point C
D) Point D

Nitrogen is an important element needed for plant growth. Bacteria plays a big role in adding atmospheric nitrogen to the soil.

The nitrogen cycle is the biogeochemical process through which nitrogen is changed into a variety of chemical forms as it moves across ecosystems in the atmosphere, on land, and in the sea. It is possible to convert nitrogen using both biological and physical methods.

Fixation, ammonification, nitrification, and denitrification are significant nitrogen cycle processes. The greatest source of nitrogen, atmospheric nitrogen makes about 78% of the atmosphere on Earth. However, the biological use of atmospheric nitrogen is constrained, making it scarce in many different kinds of ecosystems.

Because the availability of nitrogen can influence how quickly important ecological processes like primary production and decomposition occur, ecologists are particularly interested in the nitrogen cycle.

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According to Newtons' first law of motion, the block needed to be pushed to move from rest. Similarly need a force to stop its motion as well due to its inertia.

Newton's first law of motion states that, an object tends to stay in its state of motion or rest until an external force acts on it. This tendency to continue in the current state of the object is called its inertia.

Thus, an object at rests continue on rest if a force make it move. A stationary bus will move backwards when it is started quickly due to its inertia in rest. Similarly it will move to front when stopped suddenly.

Here, the block was initially at rest. If it is pushed it gains a kinetic energy and starts moving. When it moves with a constant speed it tends to continue in the moving and cant stop it until another force comes to stop it.

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The 2.4 m measurement of a plank might be inappropriately reported if the meter rule used doesn't have the precision to report to tenths of a meter. The proper reporting of a length measurement should match the precision of the measurement tool, and include any measurement uncertainty using significant figures.

The reading of the length of a plank measured as 2.4 m may be inappropriately reported if the measuring instrument, such as the meter rule, is not precise enough to report the measurement to the nearest tenth of a meter. When measurements yield inexact numbers, it's important to report them to the appropriate degree of precision based on the measuring tool used. A common meter stick may not have the necessary granularity to estimate beyond whole centimeters effectively, and therefore, reporting the length to a precision of tenths of a meter, like 2.4 m, might not be possible. If the meter rule used only has markings for each centimeter, the more appropriate reading would be to the nearest whole centimeter. It's also vital to include measurement uncertainty when expressing measurements, as suggested by the principles of significant figures.

Furthermore, while a meter stick is useful for measuring objects that are a few meters in length, for larger measurements, different units like kilometers might be used. For smaller measurements, centimeters or millimeters are more appropriate. The standard unit of length in the SI system is a meter, which is suitable for measuring everyday objects, like furniture or components of a small structure such as a doghouse. When a more granular measurement is required, millimeters (mm) or centimeters (cm), which are subdivisions of a meter, are used.

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John Watson's demonstration of classical conditioning with Baby Albert involved pairing a loud noise (UCS) with a white rat (CS) to elicit a fear response (CR) in Albert, which later generalized to similar furry objects.

John Watson's experiments with Baby Albert are classic demonstrations of classical conditioning. Watson and his graduate student, Rosalie Rayner, used this method to show how a neutral stimulus, when paired with an unconditioned stimulus, can evoke a conditioned response. In the case of Little Albert, the unconditioned stimulus (UCS) was the loud noise, and the unconditioned response (UCR) was fear from the noise. The conditioned stimulus (CS) became the white rat after it was repeatedly paired with the loud noise. Soon, the mere presence of the white rat evoked the conditioned response (CR), which was fear. Later, stimulus generalization occurred when Little Albert started to fear similar furry objects.

Answer:

Kinetic energy of the ball is 25 joules.

Explanation:

Mass of the snowball, m = 2 kg

Speed of the ball, v = 5 m/s

Let E is the kinetic energy of the snowball. The energy possessed due to the motion of an object is called its kinetic energy. Mathematically, it is given by :

[tex]E=\dfrac{1}{2}mv^2[/tex]

[tex]E=\dfrac{1}{2}\times 2\times 5^2[/tex]

E = 25 joules

So, the kinetic energy of ball is 25 joules. Hence, this is the required solution.

Answer:

40.59 years

Explanation:

Use the decay law of radioactivity

[tex]N = N_{0}e^{-\lambda t}[/tex]

Where, λ is the decay constant

λ = 0.6931 / T

where, T is the half life

λ = 0.6931 / 10 = 0.06931 per year

So, N = 6% of N0

[tex]0.06 = e^{-0.06931\times t}[/tex]

By solving we get

t = 40.59 years

Yes, a balance measures mass, not weight and can do so in any enhanced environment. Also, the moon has gravity even if it is less than earth. What might be a bit unclear is that masses for it are standardized for Earth's gravitational field at its surface at sea level. So the interpretations for "weight" will have to be increased by 6 times so that it could be equivalent to Earth.

Answer:

Explanation:

We can use one of the SUVAT equations like:

[tex]s = ut + \frac{1}{2} a^{2}[/tex]

where s = displacement, u = initial velocity, a = the acceleration and t = time.

To get the velocity of the eagle, we have to look at motion of the fish first, using the SUVAT equation form above, therefore:  

Vertical motion, which is going downwards

displacement = 6.1 m

Initial velocity = 0 m/s ,

acceleration = 9.8 [tex]m/s^{2}[/tex]

So, we need to find the time.

[tex]6.1 = 0t + \frac{1}{2} 9.8t^{2}\\6.1 = 4.9t^{2} \\t^{2}= \frac{6.1}{4.9}\\t = \sqrt{1.2448}\\t = 1.116 s[/tex]

Now with the time, we can look at the horizontal motion of the fish, where the variable of the initial velocity, u, is what we need to find, which is also the velocity of the eagle:

Acceleration = 0 [tex]m/s^{2}[/tex]

Displacement = 7.9 m ,

time = 1.116 seconds we need to find Initial velocity (u).

[tex]7.9 = v*1.116 + \frac{1}{2} 0*1.116^{2}\\7.9 = 1.116v \\v= \frac{7.9}{1.116} \\ v= 7.1 m/s[/tex]

Therefore, velocity of the eagle = 7.1 m/s

Answer:

[tex]9.6 \cdot 10^6 m[/tex]

Explanation:

we can solve the problem by equalizing the force of gravity that keeps the satellite in circular motion with the centripetal force:

[tex]G\frac{m M}{r^2}=m\frac{v^2}{r}[/tex]

where

[tex]G=6.67 \cdot 10^{-11}[/tex] is the gravitational constant

m is the satellite's mass

M is the Earth's mass

r is the distance of the satellite from Earth's center

v is the tangential velocity of the satellite

By re-arranging the formula and substituting the numbers, we find r:

[tex]r=G \frac{m}{v^2}=(6.67 \cdot 10^{-11})\frac{6 \cdot 10^{24}}{(5000)^2}=1.6 \cdot 10^7 m[/tex]

However, this is the distance of the satellite from Earth's center. Since we want to know its distance from the Earth's surface, we must subtract the value of the Earth's radius:

[tex]r'=r-R=1.6 \cdot 10^7 m-6.4 \cdot 10^6 m=9.6 \cdot 10^6 m[/tex]

The satellite's distance from Earth's surface is approximately 1.28 x 10^6 m.

To find the distance of the satellite from Earth, we can use the formula for the speed of an object in circular motion, V = √(GM/r), where V is the speed of the satellite, G is the gravitational constant (6.67 × 10^-11 N(m/kg)^2), M is the mass of the Earth, and r is the distance of the satellite from the centre of the Earth. In this case V is given as 5000 m/s and M is given as 6 x 10^24 kg. Rearranging the formula to solve for r, we get r = GM/V^2.

Plugging in our given values: r = [(6.67 × 10^-11 N(m/kg)^2 * 6 x 10^24 kg) / (5000 m/s)^2] ~ 7.68 x 10^6 m. However, this is the distance from Earth’s centre. We must return it to the distance from Earth's surface by subtracting Earth's radius, resulting in r - Earth's radius = 7.68 x 10^6 m - 6.4 x 10^6 m ~ 1.28 x 10^6 m.

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Answer:

The labyrinthodont lived in Antarctica. Its a reptile thats extinct (also one of the first to walk on land)

Explanation:

The answer is D. As chlorophyll a increases, we would expect dissolved oxygen to decrease and because benthic organisms are animals, they too would decrease.

Scientists in different parts of the world repeat an experiment several times and get the same result to make conclusions reliable is the most likely reason why experiments are repeated to produce the same result, therefore the correct answer is option D

Scientific claims are statements made in science based on an experiment.

These Scientific claims are backed by the experimental data and their true results obtained from scientific investigation and experimentation.

A repeated experiment should provide the same outcomes when carried out by several individuals at various periods and preferably, but not always, under comparable circumstances. Consistent experiments must be conducted by renowned scientists who are unrelated to the claimant. 

Thus, The most likely explanation for why experiments are repeated to produce the same result is that scientists around the world do so in order to draw reliable conclusions. As a result, option D is the best response.

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The tension in the wires must be equal to the weight of the hooked weight for it to be in equilibrium, so it is not possible for the two wires to exert forces with magnitudes of 0.60 N and 0.70 N on the hooked weight.

The tension in the wires must be equal to the weight of the hooked weight for it to be in equilibrium. Since the gravitational force acting on the weight is 1.0 N downward, the sum of the magnitudes of the tensions on the two wires must also be 1.0 N to cancel out the gravitational force. Therefore, it is not possible for the two wires to exert forces with magnitudes of 0.60 N and 0.70 N on the hooked weight.

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Answer;

A) ∠1 and ∠2

Explanation;

Supplementary angles form a straight line and have a sum of 180 degrees. Supplementary angles do not have to be congruent or adjacent. Angle 1 and angle 2 are supplementary angles.

Complementary angles on the other hand are two angles whose sum is 90 degrees. Supplementary and complementary angles do not have to be adjacent (sharing a vertex and side, or next to), but they can be. angles sum right angle.

Answer:  

The angle of shear can be defined as the angle of the deformation that occurs on the sides when the object is exerted upon by shearing stress or deformation force.

The angle  of twist can be defined as the angle through which the rotating machine element rotates or twists with respect to its free end. The angle of twist exists because of the torque.

The law of conservation of energy states that the total energy in a system remains constant. Energy can be transferred from one system to another or change form, but the total amount of energy remains the same.

The law of conservation of energy states that the total energy in a system remains constant. Energy can be transferred from one system to another or change form, but the total amount of energy remains the same. For example, when a ball is raised to a certain height, it gains potential energy. As the ball falls, the potential energy is converted to kinetic energy. The sum of the potential and kinetic energy remains constant throughout the process.

The speeds of  the centre of mass is 2 2.0 m/s and block 2 is 4 m/s.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

(a) By conservation of momentum, the velocity of the center of mass is unchanged, i.e., 2.0 m/s.

(b) The speed of the center of mass = (m1v1+m2v2) / (m1+m2)

Since the second mass is initially at rest, vcom = m1v1 / (m1+m2)

Therefore, the initial v1 = vcom (m1+m2) / m1 = 2.0 m/s x 6 = 12 m/s

Since the second mass is initially at rest, v2f = v1i (2m1 /m1+m2 ) = 12 m/s (2/6) = 4 m/s

The speeds of  the centre of mass is 2 2.0 m/s and block 2 is 4 m/s.

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It will be attracted most to your positively charged hair. This is why it will make it stand on end. Unlike charges attract, like charges repel.

v₀ = initial velocity of the mass = 0 m/s                (since the mass falls from rest)

a = acceleration = acceleration due to gravity = 9.8 m/s²

d = vertical distance traveled = 12 m

v = final velocity of the mass

Using the kinematics equation

v² = v₀² + 2 a d

v² = 0² + 2 (9.8) (12)

v² = 235.2

v = √235.2

v = 15 m/s

hence the speed of mass comes out to be

b) 15 m/s

Answer:

B)   ATP

Explanation:

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We have that from the Question"Conduction is the movement of heat energy because of the collision of" it can be said that

Conduction is the movement of heat energy because of the collision of  of molecules

From the Question we are told

Conduction is the movement of heat energy because of the collision of...

A. The collision of molecules

B. The repulsion of molecules away from each other

C. Cold inside of large molecules

D. Energy of molecules breaking down

Generally

molecules  collide with each  the at high kinetic energy and this exercise of molecule causes heat as a phenomenon to occur

Therefore

Conduction is the movement of heat energy because of the collision of  of molecules

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