If work is done on an object, the object has more energy than it did before. This energy can come from increases in kinetic energy, potential energy, and/or _____.

Answer:

False

Explanation:

A well-oiled machine has oil because there is friction. The oil lessens the friction and also allows the machine to operate and function without wear parts heating up. Oil is a cooling lubricant that decreases friction but does not eliminate it.

While there is no direct relationship between speed and thinking distance, higher speeds can result in longer thinking distances due to the increased reaction time needed by the driver.

The relationship between speed and thinking distance is not a direct one, as thinking distance is primarily influenced by the driver's reaction time rather than the actual speed of the vehicle. Thinking distance refers to the distance traveled by a vehicle during the driver's reaction time after perceiving a hazard.

However, there is an indirect relationship between speed and thinking distance in the sense that higher speeds generally result in longer thinking distances. When a vehicle is traveling at a higher speed, the driver needs more time to process information, make decisions, and react to potential hazards. Therefore, a higher speed can lead to a longer thinking distance.

It is important to note that thinking distance is just one component of the total stopping distance, which also includes braking distance. Braking distance is directly influenced by the speed of the vehicle. Higher speeds require longer braking distances to bring the vehicle to a stop.

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The point of origin is the three dimensional location while the point of convergence is the area containing intersections.

Blood pattern analysis is usually used by the forensic specialists to determine the facts surrounding an investigation using physical nature of blood stains.

There are different types of blood analysis but the one that was displayed in the picture is the impact spatter patterns which contains a point of origin and point of convergence.

The point of origin is the three-dimensional location from which blood spatter originated while the point of convergence is the area containing the intersections generated by lines drawn through the long axes of individual stains that indicates in two dimensions the location of the blood source.

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Answer:

°F = (9/5 x °C) + 32

Explanation:

Using the upper and lower fixed point as shown in the attached photo, we can obtain the formula for converting from degrees Celsius to degrees Fahrenheit. This is illustrated below:

°C – 0/100 – 0 = °F – 32/212 –32

°C/100 = °F – 32 /180

Cross multiply

100(°F – 32) = 180 x °C

Divide both side by 100

°F – 32 = 180 x °C /100

°F – 32 = 9/5 x °C

Make °F the subject

°F = 9/5 x °C + 32

°F = (9/5 x °C) + 32.

Answer:

the first choice

Explanation:

got it right on the test. hope this helps! :)

C.

Explanation: Because mirrors are lighter, and they are easier than lenses to make perfectly smooth.

Answer:

F = - k x       restoring force for spring constant k

k = F / x = 10 N / .02 m = 500 N / m      force and x are in different directions

B.      N / m = force / distance   given as k

x = F / k = 10 N / 500 N / m = .02 m

C.    F = -k x = 500 N / m * .009 m = 4.5 N

Answer:

R= v/I

R= 9/1.05=8.5714 ohms

Answer:So You Decide To Move Closer To Give The Conversation A Sound Level Of 80.0dB Instead. ... You are trying to overhear a juicy conversation, but from your distance of 24.0m , it sounds like only an average whisper of 40.0dB .

Explanation:

Answer:

Resting state

Explanation:

Answer:

See below

Explanation:

It will be the beaker which has the least volume

   Density =  mass / volume

        if all of the masses are the same, then a small volume will make density the greatest

The correct choice is "when the displacement is a zero". In simple harmonic motion, the speed is greatest when the displacement is zero, i.e., at the equilibrium position.

In simple harmonic motion, the speed of an oscillating object is the greatest when the displacement is zero, and the magnitude of the acceleration is zero. This occurs when the object passes through its equilibrium position.

At this point, the potential energy is at its minimum and the kinetic energy is at its maximum. As the object moves away from the equilibrium position, the potential energy increases while the kinetic energy decreases, resulting in a decrease in speed.

As the object approaches the maximum displacement, the potential energy is at its maximum while the kinetic energy is at its minimum, resulting in a decrease in speed. Therefore, the speed is greatest when the object passes through its equilibrium position.

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Answer:

Solid to liquid

Explanation:

Ice cubes are solid, adding heat to the beaker will melt the ice cubes to water.

Answer:

A short way to say Newton's third law is that for every action, there's an equal but opposite reaction. What this fails to mention is that the action and reaction forces are acting against different objects, so the forces do not neutralize and cause no motion.

When you write, you push the pen on the paper; the pen is pushing the paper. Meanwhile, the paper is pushing back on the pen in equal magnitude. The forces balance making the paper stay in place. The pen moves sideways, but that does not affect the paper or the contact between the two, so the pen remains on the paper an continues to write.

Answer:

Approximately \(69\; {\rm N}\) at approximately \(126^{\circ}\).

Explanation:

Assume that both angles in the question are relative to the positive \(x\)-axis (towards the positive horizontal direction.)

Horizontal component (\(x\)-component) of the two forces would be:

Note that the \(x\)-component of the \(90\; {\rm N}\) force is negative since this components points away from the positive \(x\!\)-direction.

Hence, the net force in the \(x\)-component would be:

\((50\; {\rm N}) \, \cos(30^{\circ}) + (90\; {\rm N}) \, \cos(160^{\circ}) \approx (-41.3) \; {\rm N}\).

(Again, this component is negative since it points away from the positive \(x\)-axis.)

Similarly, the vertical component (\(y\)-component) of the two forces would be:

Hence, the net force in the \(y\)-component would be:

\((50\; {\rm N}) \, \sin(30^{\circ}) + (90\; {\rm N}) \, \sin(160^{\circ}) \approx 55.8\; {\rm N}\).

Refer to the diagram attached. The resultant net force is the vector sum of the components. Apply the Pythagorean Theorem to find this net force:

\(\begin{aligned}(\text{net force}) &= \sqrt{(\text{$x$-component})^{2} + (\text{$y$-component})^{2}} \\ &\approx \sqrt{(-41.3)^{2} + (55.8)^{2})}\; {\rm N} \\ &\approx 69\; {\rm N}\end{aligned}\).

Find the angle of this net force relative to the positive \(x\)-axis using the inverse cosine function \(\arccos\):

\(\begin{aligned}\arccos\left(\frac{(\text{$y$-component})}{(\text{net force})}\right) &\approx \arccos\left(\frac{55.8\; {\rm N}}{69\; {\rm N}}\right) \\ &\approx 126^{\circ}\end{aligned}\).

(The units might need to be converted into degrees.)

With a sufficient amount of energy, one electron from an atom can be extracted.

Ionization energy is the force necessary to ionize an atom. Energy must be supplied in discrete forms rather than constantly because only one electron may be removed from an atom at a time and a certain amount of energy will be needed to remove each electron.

We can therefore claim that each electron carries energy, but that this energy is quantized rather than continuous.

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If you are not advised to evacuate or are unable to do so safely, stay indoors, away from windows, skylights and doors. Continue to monitor weather reports and do not go outside until the storm has passed. And, to protect your children from seeing too many sights and images of the hurricane, limit media exposure.

Answer:

16.2 days

Explanation:

Find the number of halflives:

1/2   *  1/2 =  1/4     so two   halflives have passed

   2 * 8.1 days = 16.2 days

The same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

Let us understand what these terms mean:

In statistical analysis, multicollinearity is the high correlation among predictors in a regression model. It is problematic because of its adverse effects on the model, including making it difficult to determine the effect of an independent variable, coefficients becoming insensitive to small changes in the model, and reducing the reliability of the model.

In regression analysis, independent predictors are those variables that contribute to the prediction of the dependent variable or outcome, and their inclusion in the model improves the accuracy of the prediction of the model.

In a regression model, it is an assumption that predictors are independent, which means that the predictors have little to no correlation with each other. If this assumption is violated, it is known as multicollinearity.

Therefore, the same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

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Rectilinear motion, as used in the context of a car traveling down the highway, refers to the car's motion in a straight path with no notable lateral or angular deviations.

Rectilinear motion is the term used to describe motion in which an object travels in a straight line. Its distinctive feature is that the displacement of the object only occurs in one dimension, which is frequently depicted as a straight line. Although the item in rectilinear motion can modify its speed and acceleration, its route will always be straight and unidirectional.

Therefore, it suggests that the car maintains a consistent course and speed, ignoring slight deviations brought on by things like traffic or the state of the road while driving down the highway in a rectilinear motion.

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The magnitude and direction of the net force on a 5.0kg object is 99.8 N inward.

The centripetal acceleration of the potter's wheel is calculated using the following formula as shown below;

a = ω²r

where;

ω = 90 rpm = 90 rev/min x 2π rad/rev x 1 min / 60 s = 9.42 rad/s

r = 45 cm / 2 = 22.5 cm = 0.225 m

a = (9.42)² x (0.225 m)

a = 19.97 m/s²

The magnitude of the net force on a 5 kg object is calculated as follows;

F = ma

where;

F = (5) x (19.97)

F = 99.8 N

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The complete question is below:

a 45-cm-diameter potter's horizontal wheel spins at 90 rpm. what are the magnitude and direction of the net force on a 5.0 kg object.

Answer:

28.8kg

Explanation:

h1=8m

h2=2m

h2-h1=6m

k=48 N/m

g=10m/(s^2)

w=F

10m=6*48

m=28.8kg

-- Class I lever

The fulcrum is between the effort and the load.

The Mechanical Advantage can be anything, more or less than 1 .

Example:  a see-saw

-- Class II lever

The load is between the fulcrum and the effort.

The Mechanical Advantage is always greater than 1 .

Example:  a nut-cracker, a garlic press

-- Class III lever

The effort is between the fulcrum and the load.

The Mechanical Advantage is always less than 1 .

I can't think of an example right now.

Answer:

First Class of Lever: In this, Fulcrum is always changes the direction of the input force and can be used to increase the force or the distance. Second Class of Lever: In this, Fulcrum does not change direction of the input force & Output force is greater than the input force. Third Class of Lever: In this, the input force is between the fulcrum and the load does not change the direction of the input force. Here, Output force is less than input force.

Explanation:

Answer:

It makes things i space 3 times more large than seeing with the normal human eyes and back when the theory that earth was the center of the solar system it was proved wrong

When two objects collide and stick together, we can apply the principle of conservation of momentum to determine the common velocity of the combined system after the collision. The conservation of momentum states that the total momentum before the collision is equal to the total momentum after the collision.

The momentum of an object is calculated by multiplying its mass by its velocity. Let's denote the velocity of the combined system after the collision as v.

Before the collision, the momentum of the first object (mass 2 kg, velocity 3 m/s) is given by:

Momentum of object A = (2 kg) * (3 m/s) = 6 kg·m/s

Before the collision, the momentum of the second object (mass 1 kg, velocity -4 m/s) is given by:

Momentum of object B = (1 kg) * (-4 m/s) = -4 kg·m/s

The negative sign for the velocity of object B indicates its opposite direction of motion.

Using the conservation of momentum, we can write the equation:

Initial momentum = Final momentum

(6 kg·m/s) + (-4 kg·m/s) = (3 kg) * (v m/s)

Simplifying the equation:

2 kg·m/s = 3 kg·v

Solving for v:

v = (2 kg·m/s) / (3 kg) ≈ 0.67 m/s

Therefore, the common velocity of the objects after the collision is approximately 0.67 m/s. Since none of the provided options match this value exactly, we can conclude that none of the given options (a), (b), (c), (d), or (e) are correct.

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Energy can neither be created nor destroyed during a chemical reaction but it can only be transformed from one form of energy to another form of energy.

Energy transformation refers to energy conversion from one form of energy to another form of energy.  such as in a hydroelectric dam that transforms the kinetic energy of water into electricity. The work of the energy transformations that take place in living organisms the leads to work.

While energy can be transformed, the total quantity of energy remains the same so  this is known as energy conservation.

So we can conclude that Energy transformation also known as energy conversion, is the procedure of changing energy.

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The speed at which the bullet leaves the barrel of the firearm is an important factor in determining accuracy.

What is Velocity?

Velocity is a term used in physics to describe the speed and direction of an object's motion. More specifically, it is the rate at which an object changes its position in a particular direction over time. Velocity is a vector quantity, which means that it has both magnitude (the speed of the object) and direction.

Spin rate: Bullets are designed to spin as they travel through the air, which stabilizes them and reduces the effect of wind and other environmental factors. The rate of spin is influenced by the rifling of the barrel and the bullet's shape and weight.

Bullet weight and shape: The weight and shape of the bullet also affect its trajectory and accuracy. A heavier bullet will generally be more stable in flight and less affected by wind, while a more streamlined shape will reduce air resistance and maintain velocity over longer distances.

Barrel quality and length: The quality of the barrel and its length can also affect accuracy. A high-quality barrel with a smooth bore and consistent rifling will produce more

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Yes, a virtual image can be projected onto a screen with the help of additional lenses or mirrors.

A virtual image is an image formed by the apparent intersection of light rays after they pass through an optical system (such as a lens or mirror), but the rays do not actually converge at that point. Instead, they only appear to diverge from a virtual location.

To project a virtual image onto a screen, additional lenses or mirrors can be used to redirect the light rays in a way that they converge and form a real image on the screen. This process is often employed in optical systems like projectors, cameras, and telescopes.

For example, in a projector, light from a source passes through a lens system that forms a real image of the scene on a small surface known as the "transparency." Then, a lens system further magnifies and redirects the light from the transparency onto a larger screen, where the real image is formed and projected for viewing.

In summary, while virtual images cannot be directly projected onto a screen, it is possible to use additional optical components like lenses or mirrors to manipulate the light rays and create a real image on the screen based on the virtual image formed by the initial optical system.

Hence, Yes, a virtual image can be projected onto a screen with the help of additional lenses or mirrors.

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The bowling ball will experience less acceleration then baseball.

Newton's second law of motion states that the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. Mathematically, this can be expressed as:

F = ma

where F is the force applied, m is the mass of the object, and a is the resulting acceleration.

In the given scenario, both the bowling ball and baseball are thrown with the same force. However, since the bowling ball has a larger mass than the baseball, according to Newton's second law, it will experience less acceleration than the baseball. This means that the correct answer is (D) less acceleration.

Therefore, the acceleration of an object is not only determined by the force applied to it but also by its mass. Objects with greater mass require more force to accelerate at the same rate as objects with lesser mass.

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