suppose that you have a reflection diffraction grating with n= 140 lines per millimeter. light from a sodium lamp passes through the grating and is diffracted onto a distant screen.

Answer:

If the body temperature falls below this temperature then enzymes will work too slowly for body process to occur fast enough the keep the mammal alive.

Explanation:

Number of moles of zinc chloride will be produced when 112 grams of zinc oxide used is  1.375 mol

The balanced chemical equation for the reaction between solid zinc oxide and hydrochloric acid is:

ZnO (s) + 2HCl (aq) → ZnCl2 (aq) + H2O (l)

From the balanced equation, we can see that 1 mole of ZnO reacts with 2 moles of HCl to produce 1 mole of ZnCl2 and 1 mole of H2O.

To determine the number of moles of ZnCl2 produced from 112 grams of ZnO, we need to first convert the mass of ZnO to moles using its molar mass. The molar mass of ZnO is 81.39 g/mol (65.38 g/mol for Zn and 16.00 g/mol for O), so:

moles of ZnO = mass of ZnO / molar mass of ZnO

moles of ZnO = 112 g / 81.39 g/mol

moles of ZnO = 1.375 mol

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Answer:

The electric field and electric potential are important concepts that can be used to describe the interaction and distribution of electric charges and forces.

Taking into account the Newton's second law, the acceleration of the 100 g mass is 50 m/s².

Newton's second law states that this force will change the speed of an object because the acceleration and/or direction will change.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object:

F= m×a

where:

In this case, you know:

Replacing in Newton's second law:

5 N= 0.1 kg× a

Solving:

a= 5 N÷ 0.1 kg

a= 50 m/s²

Finally, the acceleration is 50 m/s².

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a). 1.2 s

b). 3.81 m

c) v= 6.8 m/s

d) v= 27.05 m/s

Speed is define as the distance per unit time. It is also define as how fast an object is  moving.

According to the question:

Height = 1.5 m , speed = 7.0 m/s.

a)By using 1st equation of motion

\(V = V_{0} + g*t.\\V = 0 \\V_{0} = 7.0 m/s.g = -9.8 m/s^2\\0 = 7 + (-9.8 m/s^2)*t\\t = 1.2 s\)

b.

\(h = 1.5 + V_{0} *t + 0.5g*t^2\\V_{0} = 7.8 m/s\\t = 1.2s , g = -9.8 m/s^2\\h = 3.81 m\)

c.

\(V^2 = V_{0} ^2 + 2g*d\\V_{0} = 7.8 m/s\\g= -9.8 m/s^2.\\d= 2.2-1.5 = 0.7 m\\V = 6.8 m/s\)

d.

\(V^2 = V_{0} ^2 + 2g*h\\V_{0} = 0\\g = +9.8 m/s^2.\\h = 6.8 m\\V = 27.05 m/s\)

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If two stars have the same brightness (energy production per second), but star an is six times further away from us than star b, star a will look nine times fainter than star b.

The quantity of light released by an object in a given length of time is known as luminosity in astronomy. The Sun has a brightness of 3.846 1026 watts (or 3.846 1033 ergs per second). An observer's distance from an object has no bearing on the value of luminosity, which is an absolute measurement of radiant power. Astronomers frequently speak about an object's luminosity in terms of solar luminosities, where one solar luminosity is the same as the brightness of the Sun. The brightest stars produce several million solar luminosities of light. With 1017 solar luminosities, supernovae are the most brilliant. A few millionths of the Sun's luminosity characterises the faint brown dwarfs.

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Answer:

The velocity vBW of the boat relative to the water is 4.0 m/s, directed perpendicular to the current, as in Figure 3.18.

Explanation:

The boat is perpendicular to the shore. Then the net velocity of the boat with respect to river is 5 m/s. The observer feels like the boat is moving slower than they appear actually.

Relative velocity is velocity of an object measured with respect to other object which can be of stationary or moving with a speed. Thus speed relative to another object is called the relative velocity.

The relative velocity is what's the speed for an observer but it differs from actual velocity. Sometimes it may slower or faster depending on the object with which a we are relating the speed.

Given that the speed of the boat = 4 m/s

speed of river = 3 m/s.

Both are perpendicular and the net velocity of the boat is :

r = √(3² + 4²) = 5 m/s.

Hence, the velocity of the boat relative to the shore will be 5 m/s.

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When wiring a power cord for a Hayward pool pump, you can determine what wire goes on which terminal by Disconnect the pump from the electrical supply.and then dentify the wires in the power cord. One wire will be black, and the other wire will be white.

Next, Look at the terminals on the back of the pump motor. There should be two terminals, one labeled "L1" and the other labeled "L2."S

: Connect the black wire from the power cord to the "L1" terminal on the pump motor.

Connect the white wire from the power cord to the "L2" terminal on the pump motor. Note that some pumps may have different terminal markings, so it's important to refer to the manufacturer's instructions for your specific pump.

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Answer:

friction

Explanation:

when things like hair and the balloon run they loose some electrons to the other this makes onne object positive and negative causing them to attract

The new natural frequency would be ω/2.

we know that,

\(f = \frac{1}{2 pi \sqrt{LC} }\) = ω.       -> equation 1

now, when capacitance is quadrupled,

\(f' = \frac{1}{2 pi \sqrt{L ( 4C )} }\)

\(f' = \frac{1}{2 pi (2)\sqrt{LC} }\).           -> equation 2

substituting value of equation 1 in equation 2 , we get,

\(f' = \frac{w}{2}\)

Hence, the new natural frequency of the circuit is ω/2.

what do you mean by frequency ?

The resonant frequency for a particular circuit is the frequency at which this equality stands true. Where L is the inductance in henries and C is the capacitance in farads, this is the  LC circuit's resonant frequency.

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Phytophotodermatitis happens when certain plant chemicals cause the skin to become inflamed following exposure to sunlight.

Answer:

Phytophotodermatitis is induced by the action of long wavelength ultraviolet radiation (UVA) on a plant chemical called furocoumarins (psoralens) on the skin surface. Contact with the plant, fruit or vegetable may have been brief and unnoticed.

Explanation:

The ratio of their amplitudes is 2.

The distance between the center line (or the still position) and the top or bottom of a wave's crest or trough is known as the amplitude ().

Distance between the wave's resting position and its highest displacement is known as amplitude. Frequency is the quantity of waves that pass by a particular place each second. Period: the amount of time needed for a wave cycle to finish.

The relation between energy and amplitude is as follows:

\(\begin{aligned}&E_1=\frac{1}{2} K A_1^2 \\&E_2=\frac{1}{2} K A_2^2\end{aligned}\)

As, we know , one oscillation has 3.0 times the energy of a second one of equal frequency and mass i.e.,

\(\begin{aligned}&E_1=3 E_2 \\&\text { So, } \frac{1}{2} K A_1^2=2\left(\frac{1}{2} K A_2^2\right) \\&A_1^2=2 A_2^2 \\&\frac{A_1^2}{A_2^2}=2\end{aligned}\)

Therefore the ratio of amplitude  is 2 .

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i need the same question

The baseball team (without the bus) has a momentum of 56,819 kg*m/s.

The momentum of an object is defined as the product of its mass and velocity. To calculate the momentum of the baseball team, we need to find the total mass of the team and the velocity of the team relative to the ground (which is the velocity of the bus since the team is riding on it).

The total mass of the team is given by:

mass of team = number of players x average mass per player

mass of team = 25 players x 84.4 kg/player = 2,110 kg

The velocity of the team relative to the ground is the same as the velocity of the bus, which is given as 26.9 m/s.

Therefore, the momentum of the baseball team is:

momentum = mass x velocity

momentum = 2,110 kg x 26.9 m/s

momentum = 56,819 kg*m/s.

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Both the angular momentum and linear momentum of the system can change in time. So the correct option is C.

In an isolated system moving through empty space, the total linear momentum and the total angular momentum of the system are conserved quantities. This means that if no external forces act on the system, the total linear momentum and total angular momentum of the system will remain constant over time.

However, the individual objects within the system can change their position and velocity with respect to one another, and therefore their individual linear and angular momentum can change. These changes will be compensated by opposite changes in the linear and angular momentum of the other objects in the system, such that the total linear momentum and total angular momentum of the system remain constant.

This conservation of momentum is a fundamental principle of physics known as the law of conservation of momentum, and it has important applications in fields such as mechanics, astrophysics, and quantum physics.

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Answer:

A

Explanation:

The wavelength is the spatial time of an occasional wave, the distance over which the wave's shape rehashes.

Hope this helped!!

Answer:

wavelength

Explanation:

Answer:

Yes, the ball did accelerate. Acceleration is the change in velocity over time.

Since the ball was initially motionless and then hit the pin with a speed of 6 m/s after 3 seconds, its velocity changed and therefore it accelerated.

The acceleration can be calculated using the formula a = (v_f - v_i) / t, where v_f is the final velocity (6 m/s), v_i is the initial velocity (0 m/s), and t is the time (3 s). Plugging these values into the formula gives an acceleration of a = (6 - 0) / 3 = 2 m/s^2.

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The sympathetic and parasympathetic nerve pathways are two divisions of the autonomic nervous system. These pathways are responsible for regulating involuntary functions such as heart rate, digestion, and respiratory rate.

In order for these pathways to function, a stimulus is needed to trigger a response. This stimulus can be internal or external. Once the stimulus is detected, a nerve impulse is sent through a sensory neuron to the central nervous system where it is processed by an interneuron.

The processed signal is then sent through a preganglionic motor neuron to either a chain ganglia or cranial nerve ganglia, depending on the location of the effector organ. From here, the signal is transmitted to a postganglionic motor neuron which sends the signal to the effector organ. The effector organ then responds to the signal, either increasing or decreasing its activity depending on the pathway that is activated.

Here is a diagram that shows the direction of the nerve impulse along the pathway:
[Insert diagram here]
To help you understand the pathway of the nerve impulse, here are some pictures and titles that describe each step of the process:

1. Stimulus Detection: This image shows an example of an external stimulus being detected by a sensory neuron.

2. Interneuron Processing: This image shows an interneuron in the central nervous system processing the signal received from the sensory neuron.

3. Preganglionic Motor Neuron: This image shows a preganglionic motor neuron sending the signal to the chain or cranial nerve ganglia.

4. Postganglionic Motor Neuron: This image shows a postganglionic motor neuron transmitting the signal to the effector organ.

5. Effector Organ Response: This image shows the effector organ responding to the signal received from the postganglionic motor neuron.

Now, for the reactions to the motor impulse. The sympathetic and parasympathetic pathways have different effects on the effector organs. Here are three possible reactions for each pathway:

Sympathetic Pathway:
1. Increase in heart rate
2. Dilated pupils
3. Decrease in saliva production

Parasympathetic Pathway:
1. Decrease in heart rate
2. Constricted pupils
3. Increase in saliva production.

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Answer:

The acceleration is 5km/h

Explanation:

Given

Initial Velocity (u) = 30km/h

Final Velocity (v) = 50km/h

Time (t) = 4h

Required

Determine the acceleration

This question will be answered using the first equation of motion;

\(v = u + at\)

Substitute values for u, v and t

\(50 = 30 + a * 4\)

\(50 = 30 + 4a\)

Subtract 30 from both sides

\(50 - 30 = 30 - 30+ 4a\)

\(20 = 4a\)

Divide both sides by 4

\(\frac{20}{4} = \frac{4a}{4}\)

\(5 = a\)

\(a = 5\)

Hence;

The acceleration is 5km/h

Answer:

40,000,000 ⇒ scientific notation

= 4 × \(10^{7}\)

Kinetic energy is energy of motion. If the object is sitting still, then it has no kinetic energy. It doesn't matter what its mass is, or how high the shelf is.

KE = 0

In an atom of O-17, proton and electron is 8, and neutrons is 9.

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Answer: Polish creates a thin layer of wax on the surface of the leather which protects the leather from getting wet and undergoing wear and tear. It also has a lubricating effect on the leather keeping it supple and preventing the leather from drying out and cracking

ANSWER

EXPLANATION

If force F keeps the object in equilibrium

Answer:

See below

Explanation:

Find the x components of all of the forces shown, add them together, the x-component of the force F will be exactly opposite ( same magnitude but 180 degrees different)

30 cos 55  +     40 cos 205   +   50 cos 320  =  19.26    <====x component sum of all of the forces shown

F  (the x component of ) will be   Either    - 19.26   At zero degrees

                                                                 Or 19.26 at 180 degrees

Answer:

Genetic Engineering:

Benefits: More nutritious food, less use of pesticides, increased supply of food with reduced cost and longer shelf life, faster growing plants and animals

Risk: Creating foods that can cause allergic reaction or that are toxic, Unexpected ir harmful genetic changes, genes moving from one GM plant or animal to anotherplant or animal that is not genetically engineered

Cloning:

Benefits: accelerated reproduction of farmers productive livestock to better produce safe and healthy foods, reproduction of the healthiest animals, minimizing the use of antibiotics, growth hormones and chemicals

Risks: Unwantedhealty effects, defects, premature aging and problems with the immune system

Artificial Selection:

Benefits: no safety issues as those brought by genetic engineering, cheap for agricultural businesses, morally accepted, produce crops with higher yield

Risks: Removes variation, makes organism susceptible to diseasesor changes in environment, unable to control genes inherited by offspring

Answer:

Genetic Engineering  

Benefits  

-Ability to create food that is resistant to pests, cold, and disease.  

-Greater food production volume and increased vitamins.  

Risks  

-Concerns about long-term health risks.  

-Lack of regulation.  

Cloning  

Benefits  

-Ability to increase endangered animal populations.  

-Possibility of eliminating diseases and defective genes.  

Risks  

-Shorter lifespan for cloned animals.  

-Greater chance of health issues for cloned animals.  

Artificial Selection  

Benefits  

-Allows for selection of desired traits.  

-Ability to create better versions of organisms.  

Risks

-Loss of genetic diversity.  

-Increased chance of diseases that can shorten lifespan.

Explanation:

Index fossils are fossils that are used to help determine the relative age of rock layers and sedimentary strata. They are typically small, widely distributed organisms that lived for a relatively short period of time and are characteristic of a specific geological period. Index fossils are useful because they can help geologists and paleontologists to determine the relative age of rock formations and to understand the Earth's geological history.

It is unlikely that humans would be useful as index fossils in the future, as the time period during which humans have existed on Earth is relatively short compared to the age of the Earth as a whole. In addition, humans are not small, widely distributed organisms like many of the commonly used index fossils. Instead, humans are large, highly adapted organisms that have a wide range of habitats and are found on most of the continents.

However, it is possible that artifacts or other remains associated with human activity could be used as index fossils in the future. For example, the presence of certain types of tools or other materials might be used to help determine the relative age of a site or to understand the environmental conditions and human activity in a particular region at a specific point in time.

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The law of conservation of mass is responsible for having the same number and kind of atoms at the beginning and end of the reaction.

It states that matter is neither created nor destroyed in a closed system. That is, when a chemical reaction takes place, the amount of each element in the starting material and product must be the same. For example, carbon atoms in coal become carbon dioxide when burned. A carbon atom changes from a solid structure to a gas, but its mass remains the same.

Mass Conservation Formula-

⇒ Mass of Reactants = Mass of Products

The law of conservation of mass is of great importance in the study and practice of chemical reactions. If a scientist knows the quantities of a particular reaction and the identities of the reactants, they can predict the number of products produced.

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When the box slides across the board, the frictional force exerted by the board on the box is now 1/6F. The correct option is b.

The force that opposes the motion of two objects in touch with one another is known as the frictional force.

The normal force between the two surfaces and the coefficient of friction both affect the frictional force that the board applies to the box.

The weight of the box, which in turn depends on the gravitational acceleration and the mass of the box, determines the normal force.

The gravitational acceleration (g) on the new planet will be one-third of what it is on Earth because the planet's mass is one-third that of Earth. The planet's radius, however, is twice as large as Earth's.

On Earth:

N_Earth = m * g_Earth

On the new planet:

N_NewPlanet = m * g_NewPlanet

N_NewPlanet / N_Earth = (m * g_NewPlanet) / (m * g_Earth)

_NewPlanet / N_Earth = g_NewPlanet / g_Earth

N_NewPlanet / N_Earth = (1/3) / 1 = 1/3

The frictional force (F) is proportional to the normal force:

F_NewPlanet = μ * N_NewPlanet

F_Earth = μ * N_Earth

F_NewPlanet = μ * (1/3) * N_Earth

As a result, on the new planet, the board's frictional force on the box is one-sixth of what it is on Earth.

Thus, the correct option is b.

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Answer:

rock of mass m is dropped to the ground from a height h. A second rock, with mass 2m, is dropped from the same height. When the second rock strikes the ground, what is its kinetic energy? (a) Twice that of the first rock, (b) four times that of the first rock, (c) same as that of the first rock, (d) half as much as that of the first rock, (e) impossible to determine.

If a  rock is dropped into a canyon that is 0.3 km deep, then the time taken by the rock to hit the bottom of the canyon would be 7.82 seconds.

There are three equations of motion given by  Newton

v = u + at

S = ut + 1/2 × a × t²

v² - u² = 2 × a × s

Keep in mind that these calculations only apply to uniform acceleration.

As given in the problem, if a rock is dropped into a canyon that is 0.3 km deep.

By using the second equation of motion given by Newton,

S = ut + 1/2at²

300 = 0 + 0.5 × 9.8 × t²

t² = 300 / 4.9

t = 7.82 seconds

Thus,  the time taken by the rock to hit the bottom of the canyon would be 7.82 seconds.

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