Now i’m standing on the dock again, but this time i want to kill the fishy with a laser beam. Where should i aim?.
Answers
If you are standing on a dock and are planning to kill a fish using a laser beam, aim of your laser beam depends on various factors such as the type of fish, size, distance from the dock, and the strength of your laser beam. The aim would change from fish to fish as the eyes of the fish, like most animals, are different.
If your target fish is one that lives in the surface waters, its eyes may be positioned to look upwards. In this case, you would have to aim at the fish's head so that the laser beam can reach the eyes and cause damage or death. Similarly, fish with eyes positioned on the side of their heads need a different aim, depending on whether the fish is facing you or swimming parallel to you.
In most cases, the best aim is to target the fish's eyes. In any case, the exact aim will depend on the strength of the laser beam and the distance between you and the fish. A stronger laser beam is more likely to cause damage or death, while a weak beam may not be effective at all. Therefore, before you use your laser beam to kill a fish, you should make sure you understand its power and the safety guidelines for handling it to avoid causing harm to yourself and others around you.
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Related Questions
One piece of evidence that can help astronomers sort out how the planets in our solar system formed is
Answers
Answer:
\(\huge\boxed{\sf Circumstellar\ discs }\)
Explanation:
Astronomers discovered matter made up of gas, dust or asteroids etc. around nearby stars. This matter is called circumstellar disc (due to it being ring-shaped). These circumstellar discs are materials out of which planets form.
Circumstellar discs are one piece of evidence that can help astronomers sort out how the planets in our solar system were formed.\(\rule[225]{225}{2}\)
Hope this helped!
~AH1807what must be the acceleration of a box that is pushed with 86N of force and experiences 29N of friction? The mass of the box is 5kg
Answers
F_net:-
86N-29N57NNow
Apply Newton's second law
F=ma57=5aa=57/5a=11.4m/s²the distance traveled over a period of time is called:
Answers
Describe one practical use of a concave mirror.
Answers
Answer:
Here are some uses...
Explanation:
Uses of convex mirror:
It is used in supermarkets and stores for surveillance.
It it is used as rear view mirror in automobiles.this is due to the reason that a convex mirror provides a wider field of view than a plane or concave mirror.
Uses of concave mirror:
It is used in torches.
They are used in headlights of vehicles to send parallel rays to infinity , in shaving mirror to get an enlarged image of the face and also by dentists to see a bigger image of the tooth / teeth .
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A very narrow beam of white light is incident at 41.00 degrees onto the top surface of a rectangular block of flint glass 13.5cm thick. The indices of refraction of the glass for red and violet light are 1.638 and 1.668, respectively.Calculate the dispersion angle (i.e., the difference between the directions of red and violet light within the glass block).2. How wide is the beam when it reaches the bottom of the block, as measured along the bottom surface of the block?3. When the rainbow-colored beam emerges from the bottom of the block, the exiting rays of light are once
Answers
1. The dispersion angle can be calculated as follows:
The angle of refraction for red and violet light using Snell's Law. For red light:
sin(41.00°)/1.638 = sin(θ)/1, where θ is the angle of refraction.
Solving for θ, we get θ = 24.42°.
Similarly, for violet light:
sin(41.00°)/1.668 = sin(θ)/1,
solving for θ, we get θ = 24.07°.
The dispersion angle is then the difference between these two angles:
Δθ = θ_violet - θ_red = 24.07° - 24.42° = -0.35°.
Therefore, the dispersion angle is -0.35°.
2. Let w be the width of the beam at the bottom of the block, as measured along the bottom surface. Then, for red light:
sin(24.42°)/1 = sin(θ)/1.638,
solving for θ, we get θ = 16.68°.
Using the same approach for violet light, we get θ = 16.48°.
The width of the beam at the bottom of the block is then:
w = 13.5 cm × tan(16.68°) + 13.5 cm × tan(16.48°) = 6.69 cm.
Therefore, the width of the beam at the bottom of the block is approximately 6.69 cm.
3. When the rainbow-colored beam emerges from the bottom of the block, the exiting rays of light are once again refracted at the air-glass interface, and they spread out further due to the dispersion of the glass.
Dispersion refers to the phenomenon of a wave or radiation being separated into its component frequencies as it passes through a medium. This occurs because different frequencies of the wave travel at different speeds through the medium, causing them to spread out and separate.
One common example of dispersion is the separation of white light into its constituent colors when it passes through a prism. The different colors of light are refracted differently, causing them to separate into a rainbow-like spectrum. Dispersion is also an important phenomenon in the study of materials, particularly in optics and acoustics. In materials, dispersion can result in the absorption or reflection of certain frequencies, affecting the overall properties of the material.
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Either coal (C) or gas (G) can be used in the production of steel. The cost (per unit) of coal is 100 , the cost (per unit) of gas is 500 . Draw an isocost curve showing the different combinations of gas and coal that can be purchased (a) with an initial expenditure (TC) of 20000 . (b) if the expenditure (TC) increases by 50%. (c) if the gas price is reduced by 25%. (d) if the coal price rises by 20%. In answering parts (b)-(d), always start from the original isocost equation.
Answers
a) The isocost curve equation is G = (20000 - 100C)/500. b) The isocost curve equation is G = (30000 - 100c)/500. c) The isocost curve equation is G = (20000 - 100C)/375. d) The isocost curve equation is G = (20000 - 120C)/500.
To draw the isocost curve showing the different combinations of gas and coal, we need to use the cost per unit values for coal and gas, as well as the given expenditure (TC) and the changes in expenditure or prices.
Let's denote the quantity of coal as C and the quantity of gas as G. The cost per unit of coal is 100, and the cost per unit of gas is 500.
(a) Initial expenditure (TC) of 20000:
To find the combinations of gas and coal that can be purchased with an initial expenditure of 20000, we can use the following isocost equation
TC = 100C + 500G
We can rearrange the equation to solve for G in terms of C
G = (TC - 100C) / 500
Now we can plot the isocost curve with TC = 20000 using the equation above.
(b) Expenditure (TC) increases by 50%
If the expenditure increases by 50%, the new expenditure (TC_new) becomes 1.5 × TC = 1.5 × 20000 = 30000.
We can use the same isocost equation as before, but with the new expenditure value:
TC_new = 100C + 500G
Rearranging the equation to solve for G
G = (TC_new - 100C) / 500
Now we can plot the isocost curve with TC_new = 30000.
(c) Gas price reduced by 25%:
If the gas price is reduced by 25%, the new cost per unit of gas (Gas_new) becomes 0.75 × 500 = 375.
We can use the original isocost equation, but with the new cost per unit value:
TC = 100C + 375G
Rearranging the equation to solve for G
G = (TC - 100C) / 375
Now we can plot the isocost curve with the reduced gas price.
(d) Coal price rises by 20%
If the coal price rises by 20%, the new cost per unit of coal (Coal_new) becomes 1.2 × 100 = 120.
We can use the original isocost equation, but with the new cost per unit value:
TC = 120C + 500G
Rearranging the equation to solve for G:
G = (TC - 120C) / 500
Now we can plot the isocost curve with the increased coal price.
By plotting these isocost curves on a graph with G on the y-axis and C on the x-axis, we can visualize the different combinations of gas and coal that can be purchased at the given expenditures or price changes.
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Rate of acceleration for a 5 kg grocery cart that’s being pushed with 50 N
Answers
Rate of acceleration for a 5 kg grocery cart that’s being pushed with 50 N is 10 m/sec^2. The value of acceleration can be calculated with the help of following formula Fnet = m . a
What is the calculation of the above problem?Fnet is the net force acting on the shopping cart
m is the mass of the grocery cart
a is the acceleration of the shopping cart
So on using the formula we get
Fnet = m . a
So on putting the values we get
Fnet = 50 N
m = 5kg
a = ?
50 = 5.a
On calculating we get the value of acceleration
a = 10 m/sec^2
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A 20. 0-liter flask contains a mixture of argon at 0. 72 atmosphere and oxygen at 1. 65 atmospheres. What is the total pressure in the flask?.
Answers
The total pressure in the flask is 2.37 atmospheres. This can be obtained by adding the partial pressures of argon (0.72 atm) and oxygen (1.65 atm) together.
In a mixture of gases, each gas exerts a partial pressure proportional to its concentration. To find the total pressure, we need to sum up the partial pressures of all the gases present.
In this case, the flask contains argon and oxygen. The partial pressure of argon is given as 0.72 atm, and the partial pressure of oxygen is given as 1.65 atm. To find the total pressure, we simply add these two partial pressures together:
Total pressure = Partial pressure of argon + Partial pressure of oxygen
= 0.72 atm + 1.65 atm
= 2.37 atm
Therefore, the total pressure in the flask is 2.37 atmospheres.
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Which best describes how single-celled organisms are different from multi-celled organisms?
A.
A single-celled organism is more detailed and complex.
B.
A single-celled organism must perform all cellular functions.
С.
A single-celled organism must work with other cells to survive.
D.
A single-celled organism is specialized to perform one function.
Answers
Answer:
A single-called organism must perform all cellular functions on its own
Explanation:
i took the test
What does Radioactivity mean?
Answers
Answer:
Radioactivity means: the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Explanation: I hope this helps! :)
Answer:
sending out harmful radiation caused when the nuclei (=central parts) of atoms are broken up.
question 11 pts which of the following statements about inductors is correct? group of answer choices inductors store energy by building up charge. when an inductor and a resistor are connected in series with a dc battery, the current in the circuit is reduced to zero in one time constant. when it is connected in a circuit, an inductor always resists having current flow through it. when an inductor and a resistor are connected in series with a dc battery, the current in the circuit is zero after a very long time. an inductor always resists any change in the current through it.
Answers
An inductor always resists any change in the current through it. The correct statement about inductors is D.
This is due to the property of inductance, which is the ability of an inductor to generate a voltage that opposes any change in the current through it. This is described by Faraday's law of electromagnetic induction. As a result, inductors are commonly used in circuits to smooth out changes in current, and also to filter out high-frequency signals.
Option A is incorrect because inductors store energy in a magnetic field, not by building up charge. Option B is incorrect because an inductor allows current to flow through it, but opposes changes in the current. Option C is incorrect because the current in the circuit will eventually become steady, but not zero. Hence option D is correct.
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고체와 액체 사이의 회색 영역에서는 어떤 일이 발생합니까?
[Translated]
What happens in the gray area between solids and liquids?
Answers
Answer:
From liquid to solid or to solid or liquid the transition has to cross the grey zone.
Explanation:
hope it helps<
\( \huge \tt \blue{Answer}\)
Solids and liquids are well understood. But some materials act like both a liquid and a solid, making their behaviour hard to predict. Sand is one example. A grain of sand is as solid as a rock, but a million grains can flow through a funnel almost like water. And highway traffic can behave in a similar way, flowing freely until it becomes blocked at some bottleneck.So a better understanding of this “gray zone” might have important practical applications.“People have been asking, under what conditions does the entire system jam up or clog?” says Dr. Kerstin Nordstrom, a physicist at Mount Holyoke College. “What are the crucial parameters to avoid clogging?” Weirdly, an obstruction in the flow of traffic can, under certain conditions, actually reduce traffic jams. “It’s very counter intuitive,” she says.______________________________________
Match each problem with the correct utility.
the computer is running slowly
sensitive information is not secure
sending a large video file through email
computers in a small business that can't share
information
:: SOHO
:: compression utility
III I
:: encryption :: defragmentation utility
Answers
An encryption can be defined as a form of cryptography and it typically involves the process of converting or encoding information in plain text into a code, known as a ciphertext. Generally speaking, an information or data that has been encrypted it can only be accessed and deciphered by an authorized user.
This ultimately implies that, an encryption simply refers to a utility which can be used by an end user to to secure his or her sensitive information from unauthorized access or theft by a hacker (attacker).
In Computer programming, some examples of encryption algorithms include the following:
3DESAESRC4RC5RSAIn Computer technology, a defragmentation utility helps to reorganize (rearrange) the data stored on a disk drive and as such, it would make a computer system to run faster. Also, a compression utility is a type of utility which can be used to reduce the size of a large video file that is to be sent through an email.
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Heyyy can someone help me plz
The mass of the hammer is 0.454 kg.
(i) Calculate the weight of the hammer.
Answers
Explanation:
W = mg
= (0.454 kg)(9.8 m/s^2)
= 4.45 N
Wax melts when it is heated. Which most likely describes what is true of the result of this reaction? The bonding of the atoms is not the same before and after the change. The wax has the same density before and after the change. The same amount of wax exists before and after the change. The wax cannot be changed back into a solid.
Answers
Answer:
The same amount of wax exists before and after the change.
Explanation:
The melting of wax is a physical change and not a chemical change. During a physical change, no new substance is formed as chemical reactions do not take place. In a chemical change, however, new substances are formed because chemical reactions do take place.
In addition to that, both physical and chemical changes obey the law of conservation of matter which states that matter can neither be created nor destroyed but can be transformed from one form to another. It also entails that the mass of a substance present before a reaction should be equal to the mass obtained after the reaction.
In this case, the candle just simply changed its state from solid to liquid. This means that the total mass of the candle that existed as a solid will be the same as that of the liquid state.
Answer:
The answer is C). The same amount of wax exists before and after the change.
Explanation:
The reason for this is simple. If you put a block of wax in a pan, and put it on the scale, (lets say it weighs 2 pounds) it will way two pounds. If you stick it on a stove, and it melts, does it weigh the same amount? Yes, it does. This is because none of the wax left the pan. It just moved around. The only difference is that it is a liquid. It still has the same amount of wax.
Hope this helps!
Conversion Chart Temperature °C= 5/9 (°F - 32) Time 60 seconds = 1 minute 60 minutes = 1 hour 24 hours = 1 day Mass 1 pound = 16 ounces 1 ounce = 28.35 grams 1000 milligrams = 1 gram 1000 grams = 1 kilogram Length 1 mile = 1.6 kilometers 1 inch = 2.54 centimeters 100 centimeters = 1 meter 1000 meters = 1 kilometer Conversions for temperature, time, mass, and length.
1. 46,756,790 mg = _______ kg
2. 5.6 hours = ________ seconds
3. 13.5 cm = ________ inches
4. 47 °F = _______ °C
Answers
46,756,790 mg = 46.75679 kg
5.6 hours = 20,160 seconds
13.5 cm = 5.315 inches
47 °F = 8.333 °C
To convert milligrams (mg) to kilograms (kg), we divide the value by 1,000,000 (since there are 1,000,000 milligrams in a kilogram). Therefore, 46,756,790 mg divided by 1,000,000 equals 46.75679 kg.
To convert hours to seconds, we multiply the value by 3,600 (since there are 3,600 seconds in an hour). Therefore, 5.6 hours multiplied by 3,600 equals 20,160 seconds.
To convert centimeters (cm) to inches, we divide the value by 2.54 (since there are 2.54 centimeters in an inch). Therefore, 13.5 cm divided by 2.54 equals 5.315 inches.
To convert Fahrenheit (°F) to Celsius (°C), we use the formula °C = 5/9 (°F - 32). Plugging in the value 47 °F into the formula, we get °C = 5/9 (47 - 32), which simplifies to °C = 5/9 (15) = 75/9 ≈ 8.333 °C.
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at what wavelength λm would the intensity of blackbody radiation be at a maximum when the blackbody is at 2900k ? express your answer in nanometers to two significant figures.
Answers
At a temperature of 2900 K, the wavelength at which the intensity of blackbody radiation is at a maximum is approximately 1000 nm.
The wavelength λm at which the intensity of blackbody radiation is at a maximum can be determined using Wien's displacement law. For a blackbody at a temperature of 2900 K, the wavelength λm will be calculated in nanometers to two significant figures.
Wien's displacement law states that the wavelength at which the intensity of blackbody radiation is at a maximum is inversely proportional to the temperature of the blackbody. Mathematically, this can be expressed as λm = b/T, where λm is the wavelength at maximum intensity, T is the temperature in Kelvin, and b is Wien's displacement constant.
To calculate the value of λm for a blackbody at 2900 K, we need to substitute the temperature into the equation. The value of Wien's displacement constant is approximately 2.898 × 10⁶ nm K. Using the formula, we get λm = (2.898 × 10⁶ nm K) / (2900 K). Evaluating this expression, we find λm ≈ 1000 nm.
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Trina conducted an experiment to determine the average amount of salt in 1 liter of ocean water by allowing the water to evaporate and measuring the remaining salt.
Her results are shown below.
Trial Salt
1 9.9 g
2 14.2 g
3 8.7 g
4 13.4 g
What is the mean weight of the salt precipitate?
A.
46.2 g
B.
11.7 g
C.
11.3 g
D.
11.5 g
Answers
Answer:
The answer is . A 46.2g
How large a force is necessary to stretch a 4.0-mm-diameter steel wire from its original length by 1.0%?
Answers
The force needed to stretch the steel wire by 1% is 25,140 N.
The given parameters include;
diameter of the steel, d = 4 mm the radius of the wire, r = 2mm = 0.002 moriginal length of the wire, L₁final length of the wire, L₂ = 1.01 x L₁ (increase of 1% = 101%)extension of the wire e = L₂ - L₁ = 1.01L₁ - L₁ = 0.01L₁the Youngs modulus of steel, E = 200 Gpa
The area of the steel wire is calculated as follows;
\(A = \pi r^2\\\\ A= 3.142 \times (0.002)^2\\\\ A= 1.257 \times 10^{-5} \ m^2\)
The force needed to stretch the wire is calculated from Youngs modulus of elasticity given as;
\(E = \frac{stress}{strain} = \frac{F/A}{e/L} = \frac{FL}{Ae} \\\\F = \frac{EAe}{L}\)
\(F = \frac{200 \times 10^9\ \times\ 1.257\times 10^{-5}\ \times \ 0.01l_1}{l_1} \\\\F = 25,140\ N\)
Thus, the force needed to stretch the steel wire by 1% is 25,140 N.
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how much force is needed to accelerate a 48 kg object to 3 m/s²
Answers
Answer:
144 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 48 × 3
We have the final answer as
144 NHope this helps you
Which structure is found in some but not all plant cells?
vacuole
ribosome
cell wall
lysosome
HELP PLEASE AND THERES ONLY ONE CORRECT ANSWER!!!!!!!
Answers
Answer:
Lysosme
Explanation:
All plant cells have cell walls due to their ability to not protect themseleves unlike us humans or aniamls. Ribosomes and vacuoles also are in all plant cells as provide it with nutrients. Lysosme are not always commonly found in all plant cells because they have cell walls to proctect them. Hope this helps :)
If I hold an .63kg basketball 2 meters above the
ground, how much potential energy does it have?
If I drop the basketball from this height, how
much kinetic energy would it have right before it hits the floor?
Answers
Answer:
P.E.= 12.348 joules
K.E.=1.26 joules
Explanation:
An airplane starts from rest and accelerates at a constant rate of 3.0 m/s^2 for 30.0 s before leaving the ground.
Answers
Answer:
90m/s
Explanation:
acceleration depicts the rate of change in velocity per time, therefore an acceleration of 3m/s² means the object increases its velocity 3m/s every second therefore the second squared in the denominator
acceleration = (3m/s)/1s =3m/s²
Therefore, if the plane starts from rest (initial speed = 0m/s) and it increases 3m/s every second for 30 seconds you would have:
final_speed = initial_speed + 3m/s²*30s =0+3*30 m*s/s² = 90 m/s
PLEASE HELP!!!!!!!!!!
An object's velocity increases, multiplied by a factor of 9. What factor would its Kinetic Energy increase by?
Answers
Answer:
by 81
Explanation:
KE = (1/2)mv^2. If v2 ---> 9v then
KE2 = (1/2)m(9v)^2 = 81[(1/2)mv^2]
= 81 KE
Answer:
by a factor of 4
Explanation:
The kinetic energy is proportional to the square of the speed so doubling the speed increases.
A 0.10 kg mass is oscillating on Planet X at a small angle from a light string of length 0.20 m with a period of
0.63 s.
What is the acceleration of gravity on Planet X?
Answers
Answer:
the acceleration of gravity on Planet X is 19.89 m/s^2
Explanation:
The computation of the acceleration of gravity on Planet X is shown below:
T = 2π√l ÷ √g
g = l ÷ (T÷ 2π)^2
= 4π^2l ÷ T^2
= 4π^2× 0.2 ÷ 0.63^2
= 19.89 m/s^2
Hence, the acceleration of gravity on Planet X is 19.89 m/s^2
In this way it should be calculated
The same would be relevant and cosnidered
Why does precipitation
occur when warm air rises?
Answers
Answer:
the warm air rises, cools and condenses to form clouds
Patrice has no family history of diseases. Based on her history, what is her doctor MOST likely to tell Patrice?
O A. She should get regular health screenings.
She can avoid all health screenings.
She should visit a psychiatrist regularly.
B.
C.
D. She can avoid all vaccines.
Answers
Answer:A
Explanation: because her family doesn’t have any disease
A doctor would likely recommend regular health screenings for Patrice, despite her lack of family disease history. Screenings are universally recommended for early detection and treatment of potential issues. Vaccinations would also not be avoided based on family history alone.
Explanation:Even if Patrice does not have a family history of diseases, her doctor is most likely to tell her that she should get regular health screenings. Having no family history of specific diseases does not mean one is entirely free from the potential of developing health issues. Regular health screenings can help detect potential problems early, when they're easier to treat or manage. These screenings can involve routine physical exams, blood tests, or specific tests like mammograms or colonoscopies, depending upon age, gender, and other factors. Vaccines, similarly, are not decided based on family history, but rather on the possibility of exposure to specific diseases and age-specific recommendations.
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A ball of mass m falls vertically, hits the floor with a speed ui , and rebounds with a speed u f . what is the magnitude of the impulse exerted on the ball by the floor
Answers
Answer:
Change of momentum = M (Vf - (-Vi)) where V represents the scalar speeds of the ball or
I = M (ui + uf) and I is the impulse ΔM V = I Force = Change in Momentum
The impulse of an object is the change in its momentum. The impulse of the ball of the mass m and initial velocity Ui and final velocity Uf is m (Uf - Ui).
What is impulse?Impulse is a physical quantity measuring the change in momentum of a moving object. The momentum of an object is the product of its velocity and mass.
Thus momentum = m v.
Let L1 be the initial momentum of the ball.
mass = m
initial velocity = Ui
L1 = m Ui.
Let L2 be the final momentum with the final velocity Uf.
L2 = m Uf.
Impulse = L2 - L1
= m Uf - m Ui
= m (Uf - Ui)
Therefore, the impulse of the ball is m (Uf - Ui).
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Drag each label to the correct location on the table.
Sort the processes based on the type of energy transfer they involve.
Answers
The correct processes based on the type of energy transfer they involve can be linked as ;
condensation - thermal energy removedfreezing -thermal energy removeddeposition - thermal energy removedsublimation - thermal energy addedevaporation - thermal energy addedmelting - thermal energy addedWhat is energy transfer ?Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection.
The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.
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A 15 kg box sits still on a rough inclined plane (no math required here).
Why isn’t the box sliding down the hill?
Answers
Answer:
Explanation:
The force of friction equals the sine component of the force due to gravity
