John is diving off a springboard which is 10 meters above the water. He weighs 75 kg. Based on this information, how fast will John be moving when he hits the water below?

Answer:

calcite

Explanation:

Answer:

A force is a push or a pull.

Explanation:

Example: A boy is pushing a box. He has to push the box to go forward or pull it to go backwards.

Hope this helped

Answer:

V = 268.8 m/s

Explanation:

The speed of a wave in general is given by the following formula:

V = fλ

where,

V = Speed of that wave

f = Frequency of the wave

λ = wavelength of the wave

In this case we have a sound wave, travelling across carbon dioxide. The properties of sound wave are as follows:

V = Speed of Sound in Carbon dioxide = ?

f = frequency of sound wave = 140 Hz

λ = wavelength of sound wave = 1.92 m

Therefore,

V = (140 Hz)(1.92 m)

V = 268.8 m/s

The given problem can be exemplified in the following diagram:

The weight of the bar is concentrated in its center of mass which is located in the middle of the longitude of the bar. We can add the total torques at the point where the pivot touches the bar and we get:

Here we have used momentum counter-clockwise as positive. Since the system is in equilibrium the sum of the torques must be equal to zero:

Now we solve the operations, we will use for the acceleration of gravity 9.8 meters per second squared:

Now we solve for the mass "M" first by subtracting 88.2Nm from both sides:

Now we divide both sides by -1.96:

Solving the operations we get:

Therefore, the mass of the bar is 45 kg.

Answer:

Explanation:

Yes, According to law of conservation of energy, it has been said that energy cannot be created or destroyed.

Answer:

they store information

Explanation:

Information are encoded on the magnetic part of a hard drive and the strip of a credit card.

Answer:

Tysm

Explanation:

Answer:

solution given:

frequency[f]=215.0Hz

velocity[V]=x

wave length=2.4m

we have

wave length=\( \frac{V}{f} \)

2.4m=\( \frac{x}{215} \)

2.4×215=\( \frac{x}{} \)

x=516 m/s

velocity=speed =516m/s

Answer:

516 m/s

Explanation:

Velocity = Frequency * Wavelength

If wavelength = 2.4m, and Frequency =   215 hz

Then Velocity = 2.4 * 215 which is equal to 516

Hence, velocity = 516 m/s

The ability to see the world in three dimensions is called depth perception. It is the visual ability to perceive the relative distance of objects in space and to see them in three dimensions.

Depth perception is an important aspect of vision that allows us to accurately judge distances, perceive spatial relationships, and interact with our environment.

It is the result of the brain processing information from both eyes to create a single, three-dimensional image.

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Answer:

y = 138.96 m

Explanation:

The angle subtended by the moon is the mean of the angle of the arc between the two most extreme points of the moon, we can see that the angle is very small, so we can approximate this arc to a straight line and then use the trigonometric relationships

         sin θ = y / L

where L = 15.9 10³ m and θ = 8.74 10⁻³ rad

          y = L sin θ

          y = 15.9 10³ sin (8.74 10⁻³)

         y = 15.9 10³    0.0087399

         y = 138.96 m

(a)The force acting on a particle varies as in the fi.the work done by the force as the particle moves across the following distances is 120J.(b)W=150J,(c) The work done by the force as the particle moves from x = 0 m to x = 18.0 m is 270 J.

To find the work done by the force as the particle moves across different distances, we need to integrate the force with respect to displacement.

(a) From x = 0 m to x = 12.0 m:

The work done is given by:

W = ∫ F(x) dx

where F(x) is the force at position x.

Looking at the graph, we can see that the force is constant at 10 N from x = 0 m to x = 12.0 m. Therefore, the work done is:

W = F × Δx

W = 10 N × 12.0 m

W = 120 J

(b) From x = 12.0 m to x = 18.0 m:

The force varies linearly with displacement in this interval. We can calculate the average force and multiply it by the displacement to find the work done.

Average force = (F1 + F2) / 2

F1 = 10 N (force at x = 12.0 m)

F2 = 40 N (force at x = 18.0 m)

Average force = (10 N + 40 N) / 2

Average force = 25 N

The displacement Δx = 18.0 m - 12.0 m = 6.0 m

W = F × Δx

W = 25 N × 6.0 m

W = 150 J

(c) From x = 0 m to x = 18.0 m:

To find the total work done for the entire displacement, we can sum up the individual works from part (a) and part (b).

Total work = Work in part (a) + Work in part (b)

Total work = 120 J + 150 J

Total work = 270 J

Therefore, the work done by the force as the particle moves from x = 0 m to x = 18.0 m is 270 J.

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Answer:

Group 1

Explanation:

In group 1

K and Na are highly reactive and are soft that we can even cut them with a knife

Alkali metals are observed to be extremely reactive, highly conductive, soft, and glossy elements.

The elements of the periodic tables that behave as metal, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron, silicon, germanium, arsenic, antimony, tellurium, etc.

The solitary valence electron results in weak bonding between the atoms of the element, making it soft.

The elements will react with other elements in order to shed their lone valence electron in order to become stable.

Thus, an element is highly conductive, highly reactive, soft, and lustrous. the element most likely belongs to group 1.

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The parenting style that can be described as restrictive and controlling is called authoritarian.

The rejection of political plurality, the use of strong central power to maintain the political status quo, and reductions in the rule of law,

The separation of powers and democratic voting characterize authoritarianism.

Many typologies of authoritarian systems of administration have been developed by political scientists.

Authoritarian governments can be autocratic or oligarchic, and they can be founded on party or military authority.

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To balance the torque bar, we can use the equation: torque = force x distance. In this case, the torque on one side of the pivot should be equal to the torque on the other side.

For the first scenario, the torque is calculated as follows:
Torque1 = (300 g) x (20 cm)

To balance the torque bar, we need to find the mass that should be placed 30 cm from the pivot. Let's call it mass2. The torque equation for this scenario will be:
Torque2 = (mass2 g) x (30 cm)

Since the torque on both sides of the pivot should be balanced, we can set up the equation:
Torque1 = Torque2

(300 g) x (20 cm) = (mass2 g) x (30 cm)

To solve for mass2, we can divide both sides of the equation by 30 cm:
(300 g) x (20 cm) / (30 cm) = mass2 g

After simplifying, we find that mass2 is approximately 200 g.

In summary:
You will have to place a mass of approximately 200 g 30 cm from the pivot to balance the torque bar.
By equating the torques on both sides of the pivot, we can determine the mass required. The torque equation for each side of the pivot is set equal to each other, and by solving the equation, we find that the mass needed is approximately 200 g.

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Answer:

Copper is a better heat conductor than glass. In general, we think of metals as good conductors. In fact, metals vary widely in their conductivity but, overall, they are better conductors of heat than most liquids and gasses. Other solids also vary in their capability to conduct heat.

Explanation:

The best thermal insulator is glass. The correct option is D.

The prevention of heat transfer between surfaces that are in thermal contact or within a radiative influence zone is known as thermal insulation.

In addition to using the right item forms and materials, specially engineered technologies or processes can also be used to provide thermal insulation.

The term "thermal insulation" refers to the various ways we try to prevent heat from transferring from one object to another.

These two items could be the inside and outside of exterior walls in residential structures or the hot and cold faces of processing equipment in industrial settings.

Glass has a very small amount of unpaired electrons that are not in use, making it a good electrical insulator. Extremely strong electron interactions hold the atoms of glass together.

Thus, the correct option is D.

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The dot product is 25, the angle is \(\theta = cos^{-1} \frac{25}{\sqrt{35} \times \sqrt{21}}\), the cross product is 1i + (-6)j + (-7)k, and the area of the parallelogram spanned by vectors A and B is \(\sqrt{86}\).

Given,

A = 5i + 3j + k

B = 4i + j + 2k

i. Dot Product (A · B):

The dot product of two vectors A and B is given by the sum of the products of their corresponding components.

\(A.B = (A_x \times B_x) + (A_y \times B_y) + (A_z \times B_z)\\A.B = (5 \times 4) + (3 \times 1) + (1 \times 2) \\= 20 + 3 + 2 \\= 25\)

ii. Angle between vectors A and B:

The angle between two vectors A and B can be calculated using the dot product and the magnitudes of the vectors.

\(cos\theta = (A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} ((A.B) / (|A| \times |B|))\\A = \sqrt{(5^2 + 3^2 + 1^2)} =\\ \sqrt{35}\\B = \sqrt{(4^2 + 1^2 + 2^2)} \\= \sqrt{21}cos\theta = \frac{(A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} \frac{25}{\sqrt{35} \times \sqrt{21}}}\)

iv. Cross Product (A × B):

The cross product of two vectors A and B is a vector that is perpendicular to both A and B and its magnitude is equal to the area of the parallelogram spanned by A and B.

\(A\times B = (A_y \timesB_z - A_z \timesB_y)i + (A_z \timesB_x - A_x \timesB_z)j + (A_x \times B_y - A_y \times B_x)k\\A\times B = ((3 \times 2) - (1 \times 1))i + ((1 \times 4) - (5 \times 2))j + ((5 \times 1) - (3 \times 4))k\\= 1i + (-6)j + (-7)k\)

Area of the parallelogram spanned by vectors A and B:

The magnitude of the cross product A × B gives us the area of the parallelogram spanned by A and B.

Area = |A × B|

Area of the parallelogram spanned by vectors A and B:

Area = |A × B| =

\(\sqrt{(1^2 + (-6)^2 + (-7)^2}\\\sqrt{1+36+49\\\\\sqrt{86}\)

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Answer:

A cloud is made up of liquid water droplets. A cloud forms when air is heated by the sun. As it rises, it slowly cools it reaches the saturation point and water condenses, forming a cloud. As long as the cloud and the air that its made of is warmer than the outside air around it, it floats!

Explanation:

A cloud is made up op liquid and water droplets.

Answer:

How are clouds made

Explanation:

When sunlight hits water it evaporates into the air and makes water droplets that we see as white fluufly clouds

Answer:

what are you trying to do for this question

Explanation:

Answer:

The background radiation came from the heat of the universe, with a peak corresponding to the temperature of the universe.

Answer:

2/5 v

Explanation:

Use conservation of momentum

originally    mv = 2m v

  after the crash   mv is still the same (2mv)

        but the mass is now   5m x      where x is the new velocity

                   2mv = 5 mx

                  x = 2/5 v

The momentum of two objects in a collision is conserved. Hence, the total initial momentum is equal to the final momentum of the coupled mass. Here the final velocity will then be 2/5 v.

Momentum of a moving object is the product of mass and velocity. It is a vector quantity with direction and magnitude. The total momentum of two colliding bodies is equal to the total final momentum after collision.

Let m1 and m2 be the masses and v1 and v2 be the final velocities. Vt be the velocity of the coupled mass.

Then, m1 v1 + m2 v2 = (m1 + m2) Vt

Given, mass of cart 1 = 2m

cart 2 = 3m

velocity of cart 1 = v

cart = 0 since it was at rest.

Then, 2m v + 0 = (2m + 3m) Vt

Vt = 2/5 v

Therefore, the final velocity of the couple of carts will be 2/5 v.

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The three fundamental aspects of an ideal training progression are competency, strength, and power. These three aspects are crucial for building a solid foundation for physical fitness and achieving one's fitness goals.

By focusing on these three aspects in a training progression, one can improve their overall fitness and reduce the risk of injury. All three components need to be taken into account when creating an effective training program.

Hence, the correct option is c.

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Answer:

The average force on the bullet will be "2607.43 N".

Explanation:

The given values are:

Mass of the bullet,

m = 4.2 g

Final speed,

v = 965 m/s

Initial speed,

u = 0

Distance,

S = 0.75 m

According to the Energy theorem,

⇒  \(Work \ done = Change \ in \ kinetic \ energy\)

⇒  \(F S = (\frac{1}{2} )m(v^2 - u^2)\)

On substituting the values, we get

⇒  \(F\times 0.75=0.5\times 0.0042 [(965)^2 - 0]\)

⇒  \(0.75 F = 0.5\times 0.0042\times 931225\)

⇒  \(0.75F=1955.57\)

⇒        \(F=\frac{1955.57}{0.75}\)

⇒            \(=2607.43 \ N\)

Polarized light light is unique in that it vibrates mostly in one direction.

Polarized mild waves are light waves in which the vibrations occur in a single plane. The process of reworking unpolarized light into polarized light is called polarization. There are a ramification of methods of polarizing mild.

Polarization is used for differentiating among transverse and longitudinal waves. Infrared spectroscopy makes use of polarization. it is used in seismology to take a look at earthquakes. In Chemistry, the chirality of organic compounds is tested the use of polarization strategies.

Refraction is the change in route of waves that takes place when waves tour from one medium to every other. . Light has a dual nature. as it has waves, sunlight passing via  rainstorm makes a rainbow. however, while mild moves a sun mobile, it can provide strength as a series of very small bursts. particles of count number have names together with the proton, electron and neutron.

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Answer:

acceleration = v-u/ t

= 15-10/5

= 5/5

= 1 m/s2

Explanation:

hope this helped you.

Answer:

\(\boxed {\boxed {\sf 1 \ m/s^2}}\)

Explanation:

Acceleration is the change in velocity over the change in time. Therefore, the formula for calculating acceleration is:

\(a= \frac{v_f-v_i}{t}\)

Since the body's velocity increased from 10 meters per second to 15 meters per second 15 m/s is the final velocity and 10 m/s is the initial velocity. The time is 5 seconds.

\(a= \frac{ 15 \ m/s - 10 \ m/s}{5 \ s}\)

Solve the numerator.

\(a= \frac{ 5 \ m/s }{5 \ s}\)

Divide.

\(a= 1 \ m/s/s\)

\(a= 1 m/s^2\)

The acceleration is 1 meter per second squared.

Answer:

Natural selection is a simple mechanism that causes populations of living things to change over time.  Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.

Answer: 0.01143 m/s

Explanation:

use conservation of momentum, since momentum is always conserved. assume left of = is initial, to the right if final

m1v1=m1v1 + m2v2

(40)(20)=(40)(5) + (350)(v2)

solve for v2 (denoting velocity of bear)

yes, the bear will be moving, at a speed of 0.011428571 (round how you like)

To calculate the mean atomic mass, μ and He when X = 0.70, Y = 0.30, Z = 0.00, the following steps should be taken. The first step is to calculate the average atomic mass of the element.

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Answer: macroscopic outputs

Explanation:

When fireworks explode, sound and light are produced. These are examples of macroscopic outputs. Because, explosion from fireworks is an exothermic process which releases massive heat energy to the surroundings.

Exothermic reaction are those which evolve heat energy to the surroundings.  The change in enthalpy of the reaction is negative here. Whereas, in an endothermic reaction energy is absorbed by the reactants.

Exothermic reactions sometimes results in massive explosion. The heat energy released to the surroundings from the fire works is macroscopic level.

The small scale process or quantity that cannot be measured using normal scales are called microscopic units. Therefore, the sound, light, and heat from the explosion all are macroscopic outputs.

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The turntable rotates very slowly at 60 rpm, hence the coin does not slide off as the static friction force is greater than the centripetal force.

Missing data from the question:

Static coefficients of friction (μs) = 0.8

Kinetic coefficients of friction (μk) = 0.5

There are two forces works on the coin, the friction force and the centripetal force. The coin will start to slide off if the centripetal force is equal to the maximum static friction force.

Let:

Fs =  static friction force

Fc = centripetal force

Fs = μs . mg

Fc = m . v²/R = m . ω²R

Where:

m = coin's mass

g = gravitational acceleration = 10 m/s²

ω = angular velocity

Parameters given:

R = 15 cm = 15 . 10⁻² m

m = 5 gram = 5 . 10⁻³ kg

ω = 60 rpm = 60 . 2π/60 =  2π rad/s

Hence,

Fs = μs . mg = 0.8 . 5 . 10⁻³ . 10 = 4 . 10⁻² N

Fc =  m . ω²R = 5 . 10⁻³ . (2π)² . 15. 10⁻² = 2.96 .10⁻² N

Since Fs > Fc, hence the coin does not slide off.

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If you know the total current and  voltage across the circuit, then you can find the total resistance using the Ohm's Law, that is : R = V / I.

In a series-parallel circuit, one can find the total resistance of circuit by calculating resistance of each parallel section and then adding reciprocals of these values to obtain total resistance of parallel section. Next, you can add series resistances to this total resistance to obtain single resistance for entire circuit.

In series the total resistance is equal to the sum of the resistors. In parallel,  inverse of the total resistance is equal to the the sum of the inverse of each individual resistor.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: How is resistance calculated in a series-parallel circuit?

Answer:

The not alligator side.

Obviously the middle, both sides will be shallow, so the middle will most likely  be the deepest part.

Explanation: