A motor transfers 12 kJ of energy in 30 s. Calculate its power.

The human life valuation based on the information is E. $500000 or more.

It was illustrated that the motorcycle riders to wear helmets reduces the probability of a motorcycle fatality from 0.3 percent to 0.2 percent over the lifetime of a motorcycle rider.

Probability is the occurence of likely events. It is the area of mathematics that deals with numerical estimates of the likelihood that an event will occur or that a statement is true.

Since the cost of a lifetime supply of helmets is $500, the lifetime human life = = 500 / (0.3 - 0.2) × 100

= 500 / 0.1 × 100

= 5000 × 100

= 500000

The correct option is E.

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Complete question

Suppose that requiring motorcycle riders to wear helmets reduces the probability of a motorcycle fatality from 0.3 percent to 0.2 percent over the lifetime of a motorcycle rider and that the cost of a lifetime supply of helmets is $500. it is efficient for the government to require riders to wear helmets if human life is valued at:

A. $100 or more.

B. $150 or more

C. $500 or more.

D. $50000 or more.

E. $500000 or more.

Answer:

the process of comparing unknown quantities with known standards quantities are known as measurement

An ulterior motive refers to a hidden or underlying reason behind someone's actions or behavior that may not be immediately apparent. Among the options provided, example C) "Becky went on a date with Rick because she hoped she'd get a free meal" is an example of an ulterior motive. Option C

In this scenario, Becky's motive for going on a date with Rick is not driven by genuine interest or connection but rather the expectation of receiving a free meal. Her primary intention is to benefit from the meal rather than building a meaningful relationship or enjoying the company of her date. The ulterior motive becomes evident as Becky's focus is more on the material gain rather than the interaction itself.

On the other hand, examples A) and B) do not demonstrate ulterior motives. In example A), Johan shares a web radio site with his co-worker Sandi because he genuinely believes she would enjoy it, without any hidden agenda. In example B), Brian selflessly shares his sandwich with Marco when he realizes Marco forgot his lunch, without any expectation or hidden motive.

Example D) does not involve an ulterior motive either. Jerome's act of picking up litter and placing it in the trash may not have received acknowledgement or thanks, but the action itself does not suggest any hidden agenda or underlying motive. It can be seen as a selfless act of environmental responsibility.

In summary, ulterior motives involve hidden intentions or agendas that may not be immediately apparent. Among the given options, example C) is the one that exhibits an ulterior motive, as Becky's primary motive for going on a date is to obtain a free meal.

Option C

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In order for the camera to follow the motion of the athlete, it must rotate at an angular velocity of approximately 1.74 rad/s.

We assume that the athlete has a non-zero size, then we can estimate the radius of the athlete's body as follows. Let's say the athlete has a height of 1.8 meters and a width of 0.5 meters. Then, we can estimate the radius of the athlete's body as the average of the height and width, or:

r = (1.8 m + 0.5 m) / 2 = 1.15 m

Using this value of r, we can calculate the angular velocity of the camera as:

ω = v / r

= 2 m/s / 1.15 m

≈ 1.74 rad/s

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Answer:

The work done will be "43,200 J".

Explanation:

The given values are:

Force,

F = 720 N

Distance,

S = 60 m

Time,

t = 30 sec

As we know,

⇒  \(Work \ done=Force\times Distance\)

On substituting the values, we get

⇒                     \(=720\times 60\)

⇒                     \(=43,200 \ J\)

If the velocity-time equation for a golf cart is v = (1 m/s) + (-0.5 m/s)t , then the initial velocity of the cart would be 1 m / s and the acceleration of the cart would be - 0.5 m / s² .

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem the velocity-time equation for a golf cart is

v = (1 m/s) + (-0.5 m/s)t ,

The initial velocity of the cart at t = 0  would be 1 m / s.

By differentiating the given equation of the velocity,

The acceleration of the cart would be -0.5 m / s.

Thus, the initial velocity would be 1 m / s and the acceleration would be  -0.5 m / s.

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Fractional crystallization of silicate melts to form magma. Magma is the layer of molten rock under the underneath of Earth's crust. When it reaches the surface, results in a volcanic eruption.

The process of separation of two or more crystalline solids based on the solubilities in the same solvent. Fractional crystallization in silicate metals (magma) is complex crystallization at constant pressure and composition. The changes in the pressure and composition, cause effects in magma.

A magma chamber is a layer of molten rock present underneath the Earth's crust. The molten rock is under extreme pressure making the surrounding rock fracture, creating outlets for magma. The magma is less dense than the mantle rock.

When it reaches the surroundings, it results in the volcanic eruption. Many volcanoes are located above the magma chamber. The magma chamber is located on the Earth's surface between 1km and 10km deep. This makes the Earth's crust 3-44 miles deep.

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To find the magnitude of the third force vector acting on a 5.00 kg object that is subjected to three forces, we need additional information such as the magnitudes and directions of the two known forces. Without this information, we cannot calculate the magnitude of the third force.

To determine the magnitude of the third force, we need to consider the principles of Newton's second law of motion. According to this law, the net force acting on an object is equal to the mass of the object multiplied by its acceleration. In this scenario, the object is experiencing an acceleration due to the combined effect of the three forces.

To calculate the magnitude of the third force, we need the magnitudes and directions of the two known forces and their resulting acceleration. However, this information is not provided, making it impossible to perform any calculations to determine the magnitude of the third force.

Without the magnitudes and directions of the two known forces and their resulting acceleration, we cannot calculate the magnitude of the third force vector acting on the 5.00 kg object. Additional information is needed to solve this problem accurately.

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It will take approximately 1.67 seconds for the car to go from a speed of 20.0 m/s to a speed of 25.0 m/s if the acceleration is 3.0 m/s².

\(v = u + at\)

Given:

u = 20.0 m/s (initial velocity)

v = 25.0 m/s (final velocity)

a = 3.0 m/s² (acceleration)

Rearranging the equation, we get:

\(t= \frac{(v - u)}{a}\)

Substituting the given values:

t =  \(\frac{(25.0 m/s - 20.0 m/s)}{3.0 m/s^{2} }\)

t = 1.67 s

Speed is the measure of the rate at which an object moves. It is defined as the distance an object travels per unit of time. Speed is a scalar quantity and is expressed in units of distance per unit of time, such as meters per second (m/s) or kilometers per hour (km/h). It is important to note that speed does not tell us anything about the direction of motion or any changes in direction. This is where velocity comes in, which is a vector quantity that includes both speed and direction.

Speed can be either average or instantaneous. Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed at a particular instant in time. Speed can also be described in terms of velocity, which includes direction as well as magnitude.

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Answer:

Uses Of Concave Mirror:

Shaving mirrors.

Head mirrors.

Ophthalmoscope.

Astronomical telescopes.

Headlights.

Solar furnaces

Answer:

Finna take your points

Explanation:

The other answer got maxed out ฅ^•ﻌ•^ฅ

Answer:

Niháo wúji si fiueng^^

Explanation:

I just introduced myself in Mandarin^^

To find the Thevenin voltage (VTh) without using Kirchhoff's voltage law (KVL) or Kirchhoff's current law (KCL), we can apply the voltage divider rule. The voltage divider rule states that the voltage across a resistor in a series circuit is proportional to its resistance.

In Figure 8-82, we need to determine the current through the load RL. To do this, we first find the Thevenin voltage (VTh) which is the open-circuit voltage across the load terminals. Here's how we can find it using the voltage divider rule:

Identify the two resistors in series: The 5.6 kQ resistor and the 15 kQ resistor.
Calculate the total resistance (RT) of the series combination: RT = 5.6 kQ + 15 kQ = 20.6 kQ.
Identify the resistor across which you want to find the voltage: In this case, it is the 15 kQ resistor.
Apply the voltage divider rule: \(VTh = (R2 / (R1 + R2)) * VSource\).
  - Substitute the values: \(VTh = (15 kQ / (5.6 kQ + 15 kQ)) * 32 V\).
  - Simplify the expression:\(VTh = (15 kQ / 20.6 kQ) * 32 V\).
  - Calculate VTh:\(VTh ≈ 23.44 V\).
Therefore, the Thevenin voltage (VTh) is approximately 23.44 V.
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===========================================================

"What Is It and What Are Some Differences Between High and Low Specific Heat Capacity?"

===========================================================

Hello! Today, let's begin with discussing what specific heat capacity is.

"What is Specific Heat Capacity?"

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"What is High and Low Specific Heat Capacity?"

______________________________________________________

Hopefully this sort of helps you have a better understanding of what specific heat is, as well as the differences between that of high and low specific heat capacity. Also, if this is a write your answer response, it is better to dive further into your studies and notes regarding this topic so you can properly answer the question and follow the guidelines. Anyways, I wish you the best of luck on your assignment. Thanks for reading!

This Process is called Dehydration.

The definition of Dehydration is: The loss or removal of water from something.

so just remember that next time you need something like that <3

Answer: C-Dehydration

Explanation:

Sulfuric acid is also used to prepare other acids and to serve as a dehydrating agent. Dehydrate means to take water away.

Hope this helps!

Please mark Brainliest! :)

The required velocity of mass 100 kg is 3.75 m/s.

The required velocity of mass 100 kg is determined by applying the principle of conservation of linear momentum as follows;

This principle states that in an isolated or closed system, the sum of the initial momentum of an object is equal to the sum of the final momentum.

momentum of the 100 kg mass = momentum of 150 kg mass

100 kg x v = 150 kg x 2.5 m/s

v = ( 375 kg m/s ) / ( 100 kg )

v = 3.75 m/s

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The complete question is below:

A mass of 150 kg is moving 2.5 m/s. How fast would an object with a mass of 100kg need to be going to hit the previous mass head on and come to a complete stop?​

(a) The average pressure exerted by the person is 40,000 N/m².

(b) The average pressure exerted by the elephant is  295,000 N/m².

The average pressure exerted by the elephant is about 7 times greater than the average pressure exerted by the person.

The average pressure exerted by each is defined as the force per unit area.

Mathematically, the formula for average pressure is given as;

P = F/A

where;

P = W / A

where;

The average pressure exerted by the person is calculated as follows;

P = (640 N) / (0.016)

P = 40,000 N/m²

The average pressure exerted by the elephant is calculated as follows;

P = (4.13 x 10⁴ N) / (0.14)

P = 295,000 N/m²

Thus, the average pressure exerted by the elephant and the person depends on their weight and area of their shoes.

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Answer:

The type of reaction represented by the model is an;

Exothermic reaction

Explanation:

Exothermic reaction reaction is a reaction that involves the giving off of excess energy as heat and or light by two or more reactants during a chemical reaction due to the higher combined energy of the reactants compared with the product

The analogy are;

The sponge balls are the reacting atoms

The water is the energy which they contain

The water given off is the excess energy which the compound formed by putting together the two soaked sponge balls is unable to hold.

Answer:

k=694.44

Explanation:

PE=1/2kx^2

5=1/2k*.12^2

5=1/2k(.0144)

divide both sides by .0144

Answer:

you can also get the best i have a problem with you have to be a good job for a while but it is a great way of doing it was really hard for the first one to have to be in the United

Answer:

36g

Explanation:

formula;

density=mass/volume

density*volume=mass

3*12=36g

hope this helps :D

Answer:

3.34g/cm

Explanation:

The correct expression for the force applied by the small dog is determined as Fs = ma + Fb.

The net force on the bone will determine the direction of the bone's acceleration. The net force on the bone is determined by applying Newton's second law of motion.

If the acceleration of the bone is towards the right (rightward), the direction of the net force will be towards the right. This implies that the force applied by the dog on the right (S) is greater than the force applied by the dog on the left (B).

F(net) = Fs - Fb

The acceleration of the bone is calculated from the net force by applying Newton's second law of motion.

a = F(net) / m

a = (Fs - Fb)/m

make Fs the subject of the formula;

Fs - Fb = ma

Fs = ma + Fb

Thus, the correct expression for the force applied by the small dog is determined as Fs = ma + Fb.

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The actual answer may differ depending on the true values of those variables.

The approximate velocity of the object at 5 seconds can be determined using the following steps:

1. Identify the given information: You are asked to find the velocity of the object at a specific time (5 seconds).

2. Determine the equation needed:

To find the velocity at a certain time, you will need to use the equation:

 v = u + at,

where

v is the final velocity,

u is the initial velocity,

a is the acceleration, and

t is the time.

3. Gather necessary data: To use the equation, you need to know the initial velocity (u) and the acceleration (a) of the object. This information is not provided in your question,

so it is not possible to give an exact answer. However, I will assume some values for u and a to provide an example calculation.

4. Example calculation: Let's assume the initial velocity (u) is 0 m/s and the acceleration (a) is 2 m/s². Plug these values, along with the given time (t = 5 seconds), into the equation:

v = u + at

v = 0 + (2 × 5)

v = 0 + 10

v = 10 m/s

In this example, the approximate velocity of the object at 5 seconds is 10 m/s. Note that this answer is based on the assumed values for initial velocity and acceleration,

So the actual answer may differ depending on the true values of those variables.

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The speed of the wave of wavelength 0.21 m is 23.1 m/s. And the correct answer is 0A. 23.1 m/s.

The speed of a wave is calculated by multiplying the wavelength and the frequency of the wave.

To calculate the speed of the wave, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the speed of the wave is 23.1 m/s.

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When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. Evaporation is a very important part of the water cycle.

What is evaporation?

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Answer:

Explanation:

To set a fossil watch with 3 dials, you will typically need to follow these general steps:

1. Identify the functions of each dial: The three dials on a Fossil watch usually represent different functions, such as the time (hour, minute, and second hands), chronograph (stopwatch), date, day, or other features. Take note of which dial corresponds to which function.

2. Pull the crown out to the appropriate position: The crown is the small knob on the side of the watch. Gently pull it out to the first or second position, depending on the specific watch model.

3. Set the time: If the first dial is for the time, rotate the crown clockwise or counterclockwise to adjust the hour and minute hands to the desired time. Pay attention to AM/PM if your watch uses a 12-hour format.

4. Set the date and day (if applicable): If the second dial displays the date and day, continue rotating the crown to adjust them accordingly. Some watches require rotating the crown in different directions or multiple positions to set the date and day separately.

5. Use the additional dials or buttons: If the third dial represents additional features like a chronograph, it may have separate buttons or functions. Consult the watch's manual or familiarize yourself with the specific functions to operate them correctly.

6. Push the crown back in: Once you have set the desired time and other functions, gently push the crown back in to its original position.

7. Confirm and double-check: Check that all the dials are displaying the correct information after setting. Ensure that the watch is functioning properly and that the hands are moving as expected.

It's important to note that the precise steps and functions may vary depending on the specific model and design of your Fossil watch. It's recommended to refer to the user manual that came with your watch or visit Fossil's official website for detailed instructions tailored to your particular watch model.

The Fossil Watch with 3 dials is a type of chronograph watch. You adjust these watches using the three crowns on the side, where the top one controls the stopwatch, the middle sets the time, and the bottom typically sets the date. The different crowns may need to be pulled out to various extents to set different functions.

Setting a Fossil Watch with 3 dials, typically known as a chronograph watch, involves several steps. Begin by locating the three crowns on the side of the watch. The top button, or crown, controls the stopwatch and second hand. The middle one controls the main watch time. The bottom crown usually sets the date.

To set the time, pull the middle crown out until it clicks twice. This will allow you to set the time by turning the crown. For the chronograph feature, press the top crown to start/stop the second hand and press the bottom crown to reset it back to zero.

To set the date, you pull the middle crown out just one click. Turning the crown one way will change the day of the week and turning it the other way will change the date of the month. Always make sure to push the crowns back in to ensure your watch is water resistant.

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Answer:

True

Explanation:

The main differences between a physical property and a chemical property are mentioned below:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points.

While A chemical property describes the ability of a substance to undergo a specific chemical change.

The decibel level (dB) of a sound is given by the equation dB = 10 * log10(I/I0), where I is the sound's intensity, and I0 corresponds to the intensity of the weakest sound that can be detected by the human ear. A sound of 140 decibels produces pain in the average human ear.

To find out how many times greater the intensity I of a sound must be to reach a decibel level of 140, follow these steps:
1. Set the decibel level to 140 in the equation: 140 = 10 * log10(I/I0).
2. Divide both sides by 10: 14 = log10(I/I0).
3. Apply the antilog (10^x) to both sides: 10^14 = I/I0.
4. Rearrange the equation to find I: I = 10^14 * I0.
The intensity I of a sound must be 10^14 times greater than I0, the intensity of the weakest sound detectable by the human ear, to reach a decibel level of 140.

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When light enters air from water, the angle of refraction will be greater than the angle of incidence and is denoted as option B.

This is defined as the angle between a refracted ray and the normal to a refracting surface. Since light entered air from water, the water has the incident ray while the air has the refracted part.

According to Snell's law: n1sinθ1 = n2sinθ2

Refractive index of water = 1.333

Refractive index of air = 1.000293

Since air is denser than water, the angle of refraction will be greater than incidence because most refraction occurs for the transmission of light across a water-air boundary

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