Urgent!!! big brain needed!
A 66.4 kg person sits on the right end of a seesaw, 2.35 m from the fulcrum. On the other end, how far from the fulcrum should a 84.2 kg person sit to balance the seesaw?

1.92 m

1.85 m

2.08 m

1.61 m

Because of the logarithmic nature of the dB scale, a 10 dB gain in sound  in a ten-fold rise in sound pressure; for example, 100 dB is ten times louder than 90 dB, and 110 dB is one hundred times louder than 90 dB.

The quantity of air pressure variation that a noise source produces is known as sound pressure. Sound pressure is what we "hear" or interpret as loudness. The surface of the drum in our sample moves just a very small distance when it is struck extremely softly, producing minor pressure fluctuations and just a faint sound.

Sound levels are measured using decibels (dB). The sound of a running motorcycle engine is around 95 dB louder than normal conversation, which is about 60 dB louder than just a whisper. Long-term exposure to noise levels above 70 dB may cause damage to your hearing. Loud noise that is over 120 dB can instantly harm your ears.

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Answer:

Below

Explanation:

It travels 4.7 seconds at its

                      horizontal velocity component of  40 * cos 35  m/s

 so it travels    4.7  s    *   40 cos (35)  m/s = 154 m from start

The golf ball land from its starting point at 154 m

Define projectile motion.

When an item is launched into the air, or projected, projectile motion occurs when air resistance is minimal and gravity is the only other force acting on the object. The trajectory of the item is referred to as its trajectory, and the object is referred to as a projectile.

Projectile motion can be divided into three major categories: vertical, horizontal, and oblique. Gravity causes a vertical acceleration, which has a value of 9.8 m/s/s downward, while maintaining the projectile's horizontal velocity at a steady value.

Time is 4.7s

Velocity is 40m/s

horizontal velocity component of 40 * cos 35  m/s

The golf ball land from its starting point at :

4.7*40 cos (35) = 154 m

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The modern and old cars are fantastic. But however they are different from one another. The vintage cars cannot compete with today's cars. The car engines are significantly advanced over the years.

The deceleration refers to the acceleration in the direction opposite to the direction of the velocity. It always reduces the speed of the objects. The slowing down of a bike in a traffic is an example of deceleration.

The modern cars have smaller deceleration, because the engines in today's cars are more powerful and reliable. They provide greater safety, stability and efficiency. The fuel tank in the modern cars are also greater than the old cars.

Thus the Passengers experience a much smaller deceleration in modern cars.

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Answer:

Yes

Explanation:

Floor wax will provide enough grip on the floor to allow people to walk without slipping, even when the floor is wet. In conclusion, A layer of wax will give your workplace more beauty and brightness. It will add sparkle to your home or business and a clean look that will impress the visitor

Answer:

Applying wax on a floor can have several effects, including:

Protection: Wax can protect the surface of the floor from scratches, stains, and other forms of damage.

Shine: Wax can give the floor a shiny, polished look that can enhance its appearance.

Slip-resistance: Some types of wax can improve the slip-resistance of a floor by creating a slightly textured surface.

However, whether or not you can walk better on a shiny floor with barefoot depends on a few factors. If the floor is very smooth and the wax is very slick, it may be more difficult to walk on the surface, especially if your feet are wet or sweaty. On the other hand, if the wax creates a slightly textured surface, it may provide better traction and make it easier to walk on the floor. Additionally, some people may prefer the feeling of walking on a smooth, polished floor, while others may find it uncomfortable or unpleasant. Ultimately, the effect of applying wax on the floor will depend on the type of wax used, the condition of the floor, and the personal preferences of the individual walking on the surface.

Explanation:

The minimum coefficient of static friction necessary to keep the race car from skidding into the wall on the outside of the turn depends on the speed and mass of the car.

Static friction is a force that acts between two surfaces in contact with each other and prevents them from sliding. It is a resistive force that works to oppose any attempts to move the two surfaces relative to each other. Static friction is much higher than kinetic friction, which is the friction present when two surfaces are sliding against each other. Static friction is the force that must be overcome before kinetic friction will take over and the two surfaces will begin to slide. Static friction is affected by a variety of factors, including the materials of the two surfaces, the roughness of the surfaces, and the normal force between the two surfaces. In general, the higher the normal force, the higher the static friction between the two surfaces.

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The mass of the object with kinetic energy of 43200 Joules and velocity of 23 m/s will be 163.33 Kg.

Kinetic energy is the energy of an object which is present due to the state of motion of the object. Kinetic energy depends upon the mass and velocity of the object. The SI unit of Kinetic energy is meter per second square (m/s²).

KE = 1/2 mv²

where, KE is the Kinetic energy,

m is the mass of the object,

v is the velocity of the object.

KE = 43200 Joules,

v = 23 m/s

KE = 1/2 mv²

m = 2 KE/ v²

m = 2 × 43200/ 23 × 23

m = 86400/ 529

m = 163.33 kg

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Answer:the shape

Explanation:

Answer:

The initial rotational kinetic energy of the yo-yo is equal to ½ × 3.5 ×10-5 kg×m2 ×(0.70m/ 0.008m)2 = 0.000912 Joules.

Kinetic energy is the energy of motion. It is the energy an object has due to its motion. Kinetic energy can be calculated by multiplying the mass of an object with the square of its velocity. Kinetic energy is a form of energy that is associated with the movement of objects. It is released when objects collide or when objects are deformed. Kinetic energy can also be converted into other forms of energy, such as thermal energy, sound energy and electrical energy.

The initial gravitational potential energy of the yo-yo is equal to the change in height multiplied by the weight of the yo-yo. The weight of the yo-yo can be calculated using the equation W = m × g, where m is the mass and g is the acceleration due to gravity. Therefore, the initial gravitational potential energy of the yo-yo is equal to 0.05 kg ×9.8 m/s2 ×0.70 m = 0.343 Joules.

b. Calculate the initial rotational kinetic energy of the yo-yo.

The initial rotational kinetic energy of the yo-yo is equal to ½Iω2, where I is the rotational inertia and ω is the angular velocity. The angular velocity can be calculated using the equation ω = v/r, where v is the linear velocity and r is the radius of the yo-yo. Therefore, the initial rotational kinetic energy of the yo-yo is equal to ½ × 3.5 ×10-5 kg×m2 ×(0.70m/ 0.008m)2 = 0.000912 Joules.

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Answer:

750m/s

Explanation:

v = fλ = (1500 Hz)(0.5 m) = 750m/s

Answer:

0.5 m and 1500 Hz divided by 750 m/s equals 750 m/s.

Explanation:

Brainliest pls!

If the atomic number is given then the number of electrons and protons is the same as the atomic number, but the number of neutrons can be calculated by subtracting the atomic number from the atomic mass number of the element.

We know that inside the nucleus protons and neutrons are present, the sum of the protons and newtons is called the atomic mass number. and the electron revolves around the nucleus for the stability of an element the number of positive charges (protons ) should be the number of negative charges (electrons).

For example, take Fluorine(F)

Fluorine has a mass number(M)= 19

Atomic number(Z) =9

Now no. of protons in fluorine is = 9

no. of electrons in fluorine is= 9

no of newton in  fluorine= M-Z=19-9=10

Hence the number of protons and electrons are same as the atomic number and the number of neutrons is the difference between the atomic mass number and the no f protons or the atomic number.

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If you drive to the north with a velocity of 88km/hr and in the other lane  A truck approaches you at a constant velocity of 104km/h, (A) the truck's velocity relative to you (Vty) is -192km/h.(B) your velocity relative to the truck (Vyt) is 192km/h. (C) The relative velocities do not change after you and the truck pass each other.

The relative velocity of body B(say) w.r.t. body A(say) is defined as the velocity with which B appears to move to A when both are in motion.

we know that,

When two body A and B, is in relative motion to one another body C, Then the relative velocity of A w.r.t B is (Vab) given by.

Vab=Vac+Vca

Here in the question Given that,

The relative velocity of you with respect to earth (Vye)=88km/h

The relative velocity of the truck w.r.t earth (Vte)= -104km/h ( it is approaching you i.e south direction)

(A) The relative velocity of Truck w.r.t you is given by,

Vte=Vty+Vye

Vty=-Vte-Vye

Vty=-104-88=  -192km/h

Vty=-192km/h towards the negative direction I.e south.

(B) Your velocity relative to the truck (Vyt) is given by,

Vyt= -Vty

Vyt=   -(-192)km/h

Vyt=192km/h towards the positive direction I.e north.

(C) The relative velocity does not change after you and the truck pass each other.

Hence, the relative velocity of the truck w.r.t you is -192km/h the relative velocity you w.r.t truck is 192km/h.

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Answer:19.42 degree

Explanation:

using Snell's law, sin(I)/sin(r) = n2 / n1 we will get the answer of angle of refraction of light.

displacement = 55 cm.Initial position = 25 cm,Final position = 80 cm,Displacement = final position-finitial position,Putting values in above formula,D = 80 cm - 25 cm,D = 55 cm,It means that the displacement of the ant is 55 cm.

Distance is the length of any path connecting any two places.As measured along the shortest path between any two points, displacement is indeed the direct distance between them.The direction is ignored when calculating distance.

Displacement is just the distance between an object's starting point and its final location, whereas distance is indeed the length of an object's path.

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Graph of area under force vs displacement shows work done. Thus A. is 30J, B. is -12J, C. 18J.

Amount of energy required for the displacement of an object at certain distance, is called work done.

Given,

along y(m) axis, each unit is 2m.

along Fy(N) axis, each unit is 2N.

A. Distance between y = A to y = B

W(AB) = 1/2×base×height

W(AB) = 1/2×10m×6N

W(AB) = 30J

B. Distance between y = B to y = C

W(BC) = 1/2×base×height

W(BC) = 1/2×6m×-4N

W(BC) = -12J

C. Distance between y = A to y = C

W(AC) =  W(AB)+W(BC)

W(AC) = 30J+(-12J)

W(AC) = 18J.

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The question is incomplete, but most probably the complete question is, attached in image:

To study the small changes in 6 year old child to solve problems, the appropriate method of design is microgentic.

A scientific approach known as microgenetic design, sometimes known as the microgentic method, iterative search studying the same environment to examine change in great detail.

Microgenetic designs offer a detailed examination of the behavior of the system while it is changing, in contrast to cross-sectional and longitudinal designs, which only offer broad strokes of the process of change.

The approach is applicable to any system human or otherwise whose behavior varies over time and where it may be interesting or necessary to investigate the specifics of these changes, even though it is frequently linked with developmental psychology.

This includes adult settings as well. Heinz Werner's description of a "genetic approach" in the early 20th century appears to be when the term "microgenetic" first appeared.

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The domain theory of magnetism explains that ferromagnetic materials such as iron are composed of tiny magnetic domains that are randomly oriented in the absence of a magnetic field.

These domains have their own magnetic fields that cancel each other out. When an external magnetic field is applied to the material, the domains align themselves with the field, resulting in a net magnetic field and the material becoming magnetized.

In the case of the bar of iron being magnetized by striking it repeatedly with a hammer while pointing it parallel to the earth's magnetic field, the mechanical energy from the hammer blows causes the domains to align themselves in the same direction as the earth's magnetic field. This alignment becomes "locked in" as the domains resist changing their orientation once aligned. Therefore, the bar of iron becomes magnetized and will remain so until it is demagnetized or its magnetic domains are realigned in a different direction by another magnetic field.

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Explanation:

When you exercise the muscles in your body must contract, in order to do that they need oxygen, glucose, a molecule called ATP, and amino acids. As your muscles use these compounds and contract themselves, they will create waste products like carbon dioxide, and lactic acid that must be carried away from the muscles. When exercising many muscles will all require nutrients and elimination of waste products constantly at the same time. To meet this demand the heart must rapidly increase the rate at which it beats and pushes blood through the body. This is why the heart beats significantly faster during exercise.

The 25-watt bulb, with a higher resistance, are becoming brighter because the same current will be flowing both through bulbs in series, despite their being connected in series.

In order to honor James Watt, as creator of the steam engine, electricity is expressed as units of force called Watts. One amperage under the pressure with one volt is equal to one watt of electrical power.

The amount of Amps is multiplied by the battery voltage to determine Wh. As an illustration, a 12V100 (12 volt cell with a 100 Ah capacity) has a potential ( 12 x 100 Equals 1200 Wh.

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Answer:

The pedal is an application tool that applies the force over a short distance on the axle to move the wheel a greater distance with less force.

Explanation:

hope this helped

Answer:

pent fuel can be stored in two ways - either in pools at individual reactor sites or in dry casks at independent spent fuel storage facilities. Pools are large, water-filled containers in which nuclear reactor fuel is stored while it is not being used. Dry casks are heavy steel containers, or canisters, which are designed to store spent nuclear fuel safely and securely. Moving spent fuel to dry casks reduces the risks of a radiation release. [1] Currently, most spent nuclear fuel is safely stored in specially designed pools at individual reactor sites around the country. [2] All spent fuel should be transferred from wet to dry storage within five years of discharge from the reactor core. [3] 400,000 tons of spent nuclear fuel is stored at hundreds of sites across dozens of countries

Explanation:

Answer:

Spent fuel pools and dry cask storage

Explanation:

The spent-fuel-pool approach involves storing spent fuel assemblies in large pools of water that cool the assemblies and provide shielding from the radiation.

The experiment's manipulable variable, making it the independent variable. The outcome being measured and contrasted between the two situations makes the temperature of the liquid in the cup the dependent variable (with and without the wool sock).

What is Temperature?

Temperature is a measure of the amount of heat energy in a system or object. More specifically, it is a measure of the average kinetic energy of the particles in a substance, such as atoms or molecules.

We must first make sure that both cups begin the experiment with the same volume of hot liquid at the same temperature. The liquid temperature in each cup could then be measured at certain intervals (e.g., every 15 minutes) for a predetermined amount of time (e.g., an hour), and the results could be recorded. To more precisely gauge the liquid's temperature, we might use use a thermometer.

We would compare the liquid's average temperature in each cup over the time we observed after the experiment. We may conclude that the wool sock was successful in maintaining the liquid at room temperature if the cup with the wool sock maintained a greater average temperature than the original cup.

It's vital to keep in mind that we should repeat the experiment several times to make sure that our results are consistent and not the result of chance and to increase the experiment's validity and reliability. Also, we ought to use a bigger sample size and account for any additional factors that can influence the liquid's temperature, such as the environment's temperature or the liquid's initial temperature.

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You would see blue-violet hue if you peered throughout a spectroscope and observed light that had a wavelength of 450 nm.

Wavelength or frequency are connected to energy in the same way as they are to light. More energy is correlated with shorter wavelengths and higher frequencies. Hence, lower energy is produced by longer wavelengths and lower frequencies.

By measuring overall distances between two identical locations on adjacent waves, the duration can always be found. For determining the wavelength of a waveguide, the distance from one compress to the next or from one rarefaction to another is measured.

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The acceleration of the object is - 4 m/s².

The acceleration of an object is the measure of change of velocity with change in time of motion.

Mathematically, the formula for acceleration is given as;

a = Δv / Δt

a = ( v₂ - v₁ ) / ( t₂ - t₁ )

where;

From the data given, we have;

velocity (m/s)                     time ( s )

20                                         1

16                                          2

12                                          3

8                                            4

4                                            5

a = ( 16 - 20 ) / ( 2  - 1 )

a = - 4 m/s²

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Answer:

1.) Apply significantly larger forces so that deformation is more easily measured with devices like a meter stick or measuring tape.

3.) Use more precise measuring tools to detect extremely small deformations of rigid materials.

4.) Create a sample of the material that has a very large cross-sectional area so that deformations are more easily induced by a given force.

Explanation:

The meaning of the phrase command module is a satellite designed to hold a human astronaut. The correct option is C

A spacecraft is a vehicle or machine designed to fly in outer space. A Spacecraft is a type of artificial satellite is used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. All spacecraft except single stage to orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket).

spacecraft is vehicle like designed to operate with or without a crew, in a controlled conditions inside it.

A command module is a detachable controlled compartment of a manned spacecraft. it housed the three-person crew on liftoff and landing and during the trip to and from the Moon In Apollo 14.

Hence option C is correct option

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The object with the greatest kinetic energy is the locomotive engine (option C)

To know the object with the greatest kinetic energy, we shall determine the kinetic energy of each objects. Details below:

For truck:

KE = ½mv²

KE = ½ × 3500 × 30²

KE = 1575000 J

For baseball:

KE = ½mv²

KE = ½ × 0.5 × 46.9²

KE = 549.90 J

For locomotive:

KE = ½mv²

KE = ½ × 205000 × 5²

KE = 2562500 J

For person:

KE = ½mv²

KE = ½ × 73 × 6²

KE = 1314 J

From the above calculations, we can see that the locomotive has the greatest kinetic energy. Thus, the correct answer is option C

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a bolt is dropped from a 1.3-meter ladder,the long will it take it to reach the ground is Ladder length: 4.27 m =2.14 meters away.

The metric system's and also the International System of Units' primary unit of length is the metre (m), also spelt as meter (SI). The British Imperial us And the Customary systems both convert it to a measurement of roughly 39.37 inches.

Approximately 3 feet, 3 inches are equal to one meter, which is the common metric unit. Therefore, a meter is a unit of measurement in the metric system. One meter long things include, but are not limited to, guitars, baseball bats, or yardsticks. In competitions like running and swimming, meters are also employed to gauge distances.

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Answer:

3

Explanation: