give a physical reason why the curve in the graph would not reach the vertical (elost) axis even if the scientists had taken data over a broader range of temperatures.

Answer:

Workdone is 5734.06Nm.

Explanation:

Given the following data;

Force applied = 125N

Angle = 35°

Distance = 56m

To find the workdone by the lawnmower, we would first of all find the horizontal component of the force applied.

\( Horizontal force, Fx = mgCosd\)

Where;

mg = weight = 125N

Substituting into the equation, we have;

\( Fx = 125 * Cos35\)

\( Fx = 125 * 0.8192\)

Fx = 102.39N

Workdone is given by the formula;

\( Workdone = force * distance\)

\( Workdone = 102.39 * 56\)

Workdone = 5734.06Nm

Therefore, the work done by the lawnmower is 5734.06Nm.

The magnitude of a vector represents its length or size, regardless of its direction. In the case of a vector with a magnitude of 15 ft/s down, the magnitude is simply 15 ft/s.

The "down" direction indicates the direction of the vector, while the magnitude specifies the length or size of the vector. So, the magnitude of the vector in this case is 15 ft/s.

Braking studies have shown that a tractor-trailer traveling at 55 mph needs two times the distance to stop as an automobile.

There are four parts that make up a vehicle's overall stopping distance i.e., Vehicle reaction time and distance, human perception time and distance, human reaction time and distance Vehicle Braking Distance and Time

The maximum distance your car will travel while braking under perfect circumstances. It may require 216 feet at 55 mph on dry pavement with decent brakes. The brakes must use more force to stop a bigger car, which increases heat absorption. On the other hand, large vehicles' brakes, tires, springs, and shock absorbers are made to function optimally when fully loaded. Trucks that are empty need longer stopping distances because they have less traction. It can lock up and bounce, providing substantially worse braking.

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Answer:

A hydraulic press works on the principle of Pascal's law, which states that when pressure is applied to a confined fluid, the pressure change occurs throughout the entire fluid. Within the hydraulic press, there is a piston that works as a pump, that provides a modest mechanical force to a small area of the sample.

not my answer but i hope it helps

Explanation:

According to the question the maximum current in the circuit is 40.45 mA.

A circuit is an interconnected network of electrical components which, when connected to a power source, forms a closed loop that allows electrical current to flow. This current is then regulated by components such as resistors, capacitors, and transistors, which all work together to form a functioning circuit. Circuits are used in many everyday applications, such as electronics, computers, and even automobiles.

The maximum current in the circuit is given by the expression:
\(I_{max} = \frac{V}{R + \frac{1}{\omega L}}\)
Plugging these values into the expression, we get:
\(I_{max} = \frac{9.0}{220 + \frac{1}{0 \cdot 130 \cdot 10^{-3}}}\)
Simplifying, we get:
\(I_{max} = 40.45 mA\)
Therefore, the maximum current in the circuit is 40.45 mA.

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The work done by gravity on the crate is -29,430 Joules when crane is lifted a distance vertically.

We'll calculate the work done by the crane and the work done by gravity on the crate.

1. Work done by the crane (W) on the crate:
To find the work done, we'll use the formula:
W = force × distance × cos(θ)

Since the crane is lifting the crate vertically, the force acting on the crate is equal to its weight (force due to gravity), which can be calculated as:
Weight = mass × gravity
Here, mass = 2.00 x 10² kg and gravity = 9.81 m/s²
Weight = 2.00 x 10² kg × 9.81 m/s² = 1962 N

Now, the angle (θ) between the force and distance is 0 degrees since they are in the same direction (upward). So, cos(0) = 1.

W = 1962 N × 15.0 m × 1
W = 29,430 J

The work done by the crane on the crate is 29,430 Joules.

2. Work done by gravity (W_grav) on the crate:
For the work done by gravity, the angle (θ) between the force due to gravity and the distance is 180 degrees (downward), so cos(180) = -1.

W_grav = 1962 N × 15.0 m × -1
W_grav = -29,430 J

The work done by gravity on the crate is -29,430 Joules.

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Abiotic variables are particularly essential since they have a direct impact on organisms' ability to live.

Under typical conditions, sound travels fastest in water at a temperature of around 25 degrees Celsius, a pressure of approximately 1,000 atmospheres, and low salinity.

The speed of sound in water is primarily affected by temperature. As temperature increases, the speed of sound also increases. However, the relationship is not linear. At around 25 degrees Celsius, which is considered the average temperature of the ocean, sound travels fastest in water. Higher temperatures cause water molecules to move more rapidly, enhancing the speed of sound transmission.

Pressure also plays a crucial role in sound propagation. The speed of sound increases with pressure. At greater depths in the ocean, where pressure is higher, the speed of sound is also higher. A pressure of approximately 1,000 atmospheres, which corresponds to a depth of about 10 kilometers, represents a favorable condition for fast sound transmission in water.

Salinity, the saltiness of water, affects the speed of sound to a lesser extent. In general, lower salinity results in faster sound propagation. Freshwater, which has lower salinity compared to seawater, allows sound to travel faster. However, the impact of salinity on sound speed is relatively minor compared to temperature and pressure effects.

In conclusion, the fastest speed of sound in water occurs at a temperature of approximately 25 degrees Celsius, a pressure of around 1,000 atmospheres, and low salinity conditions. These factors significantly influence the velocity of sound transmission in water, impacting various applications such as underwater acoustics, sonar systems, and oceanographic research.

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The object coordinates in frame {B} are [6.714, -2.038, 3.038].

Let's calculate the transformation matrix TBC:

Translation in XB = 7 units

Translation in YB = -2 units

Translation in ZB = 5 units

Rotated about ZC by -20 degrees

Rotated about YC by -110 degrees

The transformation matrix is,TBC = [ cosθcosϕ cosθsinϕsinα−sinθcosα cosθsinϕcosα+sinθsinα XB ] [−sinϕ cosϕsinα cosϕcosα YB ] [ sinθcosϕ sinθsinϕsinα+cosθcosα sinθsinϕcosα−cosθsinα ZB ] [ 0 0 0 1 ]

Where,θ = -110° = -110 * π/180ϕ = -20° = -20 * π/180α = 0° = 0 * π/180XB = 7YB = -2ZB = 5

Substituting the given values in the above transformation matrix, we get

TBC = [ -0.367 0.107 0.924 7 ] [-0.159 -0.982 0 -2 ] [ 0.916 -0.154 -0.371 5 ] [ 0 0 0 1 ]

The object coordinates CP = [0.5 0.2 3.2]T in frame {C}.

To determine the object coordinates in frame {B}, we'll have to transform them from frame {C} to frame {B}.

CBP = TBC.CP = [ -0.367 0.107 0.924 7 ] [-0.159 -0.982 0 -2 ] [ 0.916 -0.154 -0.371 5 ] [ 0.5 0.2 3.2 1 ]

CPB = TCB−1.CP = [ -0.367 -0.159 0.916 6.714 ] [ 0.107 -0.982 -0.154 -2.038 ] [ 0.924 0 -0.371 3.038 ] [ 0.5 0.2 3.2 1 ]

Therefore, the object coordinates in frame {B} are [6.714, -2.038, 3.038].

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Answer:

C

Explanation:

in order to be a law it needs to be definitive, so it would be a statement

Answer:

The force of gravitational attraction between them also decreas

Answer:

Force = 4.25 Newton

Explanation:

Given the following data;

Mass = 10 kg

Momentum = 15 Kgm/s

Time, t = 20 seconds

Final velocity, V = 10 m/s

To find the average force required;

First of all, we would determine the initial velocity of the object.

Momentum = mass * velocity

15 = 10 * velocity

Velocity = 15/10

Velocity = 1.5 m/s

Next, we would determine the acceleration of the object by using the first equation of motion;

V = U + at

10 = 1.5 + a*20

10 - 1.5 = 20a

8.5 = 20a

Acceleration, a = 8.5/20

Acceleration, a = 0.425 m/s²

Lastly, we would find the average force by using the formula;

Force = mass * acceleration

Force = 10 * 0.425

Force = 4.25 Newton

Answer:

2.25 x 108 m/s

Explanation:

If the speed of light in air is 3 x 108 m/s and the refractive index of water is 1.33, find the speed of light in water. (Ans. 2.25 x 108 m/s)

Answer: refractive index = c/v

Explanation:

refractive index = c/v

1.33=3x10^8/v

v=3x10^8/1.33

=2.255x10^8 m/s

Answer:

wheres the statements

Explanation:

where its incomplete

Natural selection could act on a population of proto-cells on early Earth, selecting for those that were stable and had self-replicating, catalytic RNA that allowed them to grow and divide to produce similar daughter proto-cells. The correct option is option (B).

Natural selection could act on a population of proto-cells on early Earth. Proto-cells were early, simpler forms of cells that lacked DNA but had self-replicating, catalytic RNA. Through natural selection, those proto-cells that were more stable and had RNA molecules capable of self-replication and catalytic functions would have had a reproductive advantage.

These traits would allow them to grow, divide, and produce similar daughter proto-cells. Over time, this selection process could have led to the development of more complex and stable cellular structures, eventually leading to the emergence of cells that utilize DNA as their genetic material.

Therefore the correct option is option B.

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The complete question is:

Which statement about natural selection on early Earth is correct?

A. Natural selection could only act on populations of living organisms that had DNA as their genetic material.

B. Natural selection could act on a population of proto-cells on early Earth, selecting for those that were stable and had self-replicating, catalytic RNA that allowed them to grow and divide to produce similar daughter proto-cells.

C. Natural selection acted on populations of proto-cells on early Earth in order to make them more like modern living cells that have DNA as their genetic material.

The time of flight is obtained as 25.9 seconds

The time of flight is the time taken to move the object that have been projected along the parabolic path. In this case, we have a cannonball that have been fired  from level ground with a velocity of 240.0 m/s at an angle of 32 degrees.

We know that from the question

T = 2usinθ/g

T = time of flight

u = initial velocity

θ = angle of projection

g = acceleration

T = 2 * 240.0 m/s * sin 32 degrees/9.8 m/s^2

T = 25.9 seconds

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Answer:

Explanation:

Work = W = Fd = (80 N)(2 m) = 160 J

Power = P = W/t = (160 J) / (4 s) = 40 W  (watts)

The air pressure drops as altitude rises. Initially, the pressure within the sealed container was the same as the pressure at sea level.

You bring a bag of chips with you when you get on an airline. Because the air pressure within the airtight bag is higher than the cabin air pressure, the bag expands while in flight.

There is a suction. In accordance with the Bernoulli principle, air pressure varies. The pressure in the flight cabin drops during takeoff and as the aircraft climbs in altitude. The pressure inside the package is higher when compared to the pressure inside the box or the bag.

Any variety of potato chips, including Pringles, are permitted in carry-on luggage for consumption during flights.

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The mass of an atom is less than the sum of the masses of its component protons, neutrons and electrons. The mass defect is 0.0423 amu. The correct option is B.

The mass defect is equal to the mass lost as an equivalent amount of energy during the formation of a given nucleus from the component nucleons.

Δm = M°- M

Δm = Mass defect

M° = Expected total mass

M = Experimentally determined mass

Here 'Li' has 3 protons and 4 neutrons.

The mass of proton = 3 × 1.0073 = 3.0219 amu

The mass of neutron = 4 × 1.0087 = 4.0348 amu

The sum of masses of protons and neutrons = 7.0567

Mass defect = 7.0567 - 7.0144 = 0.0423 amu

Thus the correct option is B.

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Answer:

heuristic.

Explanation:

Psychology can be defined as the scientific study of both the consciousness and unconsciousness of the human mind such as feelings, emotions and thoughts, so as to understand how it functions and affect human behaviors in contextual terms.

This ultimately implies that, psychology focuses on studying behaviors and the mind that controls it.

A heuristic is an automatic mental shortcut or rule of thumb that avail people the opportunity to make quick and efficient judgement in decision-making process, as well as proffering solutions to a problem. Thus, it allows people to make decisions, pass probability judgement or proffer solutions to problem quickly and efficiently while applying minimal mental effort.

Basically, a heuristic helps an individual to shorten the decision-making time while paying less attention on thinking of his or her next course of action.

Hence, when you're advised to try working backward from the desired goal to the starting point or current state. This advice describes a heuristic.

Answer:

C)

Explanation:

Earth's Rotation

Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.

Answer:

Force = 2802.8 Newton

Explanation:

Given the following data;

Mass = 130 lbs

But, 2.2 lbs = 1.0 kg

130 lbs to kg = 130 * 2.2 = 286 kg

Acceleration due to gravity = 9.8m/s²

To find the force in Newton;

Force = mass * acceleration due to gravity

Force = 286 * 9.8

Force = 2802.8 Newton

Answer:

I Think the answer is 1380

Explanation:

Answer: press the link

Explanation:

After slowing down by 15 miles per hour and reducing the speed by one third, you are now going at 60 miles per hour.

If you are initially driving at a rate of one and a half miles per minute, it means you are traveling at a speed of 90 miles per hour (since there are 60 minutes in an hour).

In the second step, you slow down by 15 miles per hour. This reduces your speed to 75 miles per hour.

Finally, you reduce your speed by one third, which means you need to subtract one third of 75 from 75. One third of 75 is 25, so subtracting 25 from 75 gives you a speed of 50 miles per hour.

Therefore, after slowing down by 15 miles per hour and then reducing your speed by one third, you are now traveling at a speed of 50 miles per hour.

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The ball's kinetic energy increases by equal amounts in equal time intervals, not by equal amounts in equal distances.

The ball's kinetic energy increases by equal amounts in equal time intervals. As the ball falls freely, it is affected by gravity, which causes it to accelerate at a constant rate (9.81 m/s²). Due to this acceleration, the ball gains velocity, and therefore, kinetic energy.

Kinetic energy (KE) is given by the equation:

KE = 0.5 * m * v²

Where m is the mass of the ball and v is its velocity. Since the ball is accelerating constantly due to gravity, its velocity increases linearly with time. The increase in velocity leads to a quadratic increase in kinetic energy with respect to time. Therefore, the kinetic energy increases by equal amounts in equal time intervals.

However, the kinetic energy does not increase by equal amounts in equal distances. As the ball falls, its velocity increases, causing the distance it travels in each time interval to also increase. Since the kinetic energy is dependent on the velocity squared, the increases in kinetic energy for equal distances will not be the same.

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Answer:

m = 80 kg

Explanation:

p = m × v

200 = m × 2.5

2.5m = 200

m = 200/2.5

m = 80 kg

Answer:

collagen and protein

Explanation:

Made mostly of collagen, bone is living, growing tissue collagen is a protein that provides a soft framework and calcium photosphate site is a material that adds strength to hardness the framework.

Answer:

bones are made of collagen and protein

A photon with an energy equal to this negligible kinetic energy would also have a very low energy.

At low particle speeds, the kinetic energy of an electron is given by the equation

KE = 1/2 mv^2, where m is the mass of the electron and v is its speed.

However, as the speed of the electron approaches the speed of light (c), relativistic effects become significant.

The relativistic equation for the kinetic energy of a particle is

KE = (γ - 1)mc^2, where γ is the Lorentz factor given by

γ = 1/√(1 - (v^2/c^2)).

At low speeds, v is much smaller than c, so the term v^2/c^2 is negligible.

Thus, γ is approximately equal to 1, and the kinetic energy equation reduces to KE = (1 - 1)mc^2 = 0.

In other words, at low speeds, the kinetic energy of an electron is effectively zero. Therefore, a photon with an energy equal to this negligible kinetic energy would also have a very low energy.

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Answer:

-15.708 rad/s^2

Explanation:

First, let us covert everything to the same unit. For me, I find dealing with radians/sec more intuitive, but you can solve it in rpm. We are told that the initial angular speed is 600 rpm and after 4 seconds it stops. Let's convert 600 rpm into radians/sec. To do this, multiply by 2*pi/60. This gives 62.83 rad/s. Now let's review our info:

\(\omega_i = 600rpm = 62.83rad/s\\\omega_f = 0\\t = 4s\\\alpha = ?\)

Now we look up angular kinematics equations and the equation that has these parameters is

\(\omega=\omega_0+\alpha t\)

Substitute our values in:

\(\omega=\omega_0+\alpha t\\0=62.83\frac{rad}{s}+\alpha *(4s)\\\alpha = -15.708\frac{rad}{s^2}\)