What is a prediction

The answer is gravity

Gravity  is the single force on an object in free fall object.

As a rocket increases height and slows down, it gains more and more potential energy and loses more and more kinetic energy. Potential energy is store energy (usually determined by height), and kinetic energy increases as speed increases.

Distance traveled by car =14m

Total time taken =2sec

Speed =distance / time

=14m/2sec

speed=7 m/sec

Pressure at a given surface is given as ratio of normal force and area

so here force due to heel of the shoes is given as 80 N

and the area of the heel is given as 16 cm^2

so we can say

[tex] P = \frac{F}{A}[/tex]

here we have

F = 80 N

[tex]A = 16 cm^2 = 16 * 10^{-4} m^2[/tex]

[tex]P = \frac{80}{16 * 10^{-4}}[/tex]

[tex]P = 5 * 10^4 N/m^2[/tex]

so pressure at the surface due to its heel will be 5 * 10^4 N/m^2

Final answer:

The pressure exerted on the heel of the boy's foot is 5 N/cm².

Explanation:

To calculate the pressure exerted on the heel of the boy's foot, we can use the formula: Pressure = Force / Area. In this case, the force is the weight of the boy, which is 80 N. The area of the heel is given as 16 cm². Now we can plug these values into the formula:

Pressure = 80 N / 16 cm² = 5 N/cm².

Therefore, the pressure exerted on the heel of the boy's foot is 5 N/cm².

Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

(On edge) Sample Response: In nuclear fission, the mass of the original nucleus is greater than the mass of the products. The extra mass is converted to energy. In nuclear fusion, the total binding energy of the lighter nuclei is greater than the binding energy of the heavier nucleus. Extra energy is released during the reaction.

Mimiwhatsup Answers: Deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus.

A star shines brightly due to nuclear fusion in its core, where the energy moves outward and radiates as light. Colors of stars relate to their temperature and size, and outburst events can significantly increase a star's shine. Gravitational lensing observed by telescopes can make stars appear brighter without an intrinsic change.

The cause of a star's bright shine is the nuclear fusion happening in its core. This process releases tremendous amounts of energy as the star's gravity pulls matter inward, causing the core's temperature and pressure to rise until fusion occurs. The energy produced by fusion then pushes outward, ultimately reaching the surface of the star and radiating into space as light, which we see as the star shining.

Stars shine in a variety of colors, which relate to their temperatures and sizes, where a blue star is typically hotter than a red star. However, the brightest shine of a star is observed when there are outburst events, such as a star engulfing a companion, which can greatly amplify its intrinsic brightness, like in the case of V838 Monocerotis.

Furthermore, gravitational lensing, which is observed by telescopes like Hubble, can also cause stars to appear to brighten. Though in this case, the star itself doesn't change intrinsic brightness, but rather the path of its light is altered to make it appear brighter from our perspective.

Answer:

  She will make the jump.

Explanation:

We have equation of motion , [tex]s= ut+\frac{1}{2} at^2[/tex], s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

First we will consider horizontal motion of stunt women

   Displacement = 77 m, Initial velocity = 28 cos 15 = 27.05 m/s, acceleration = 0

Substituting

   [tex]77= 27.05t+\frac{1}{2} *0*t^2\\ \\ t=77/27.05=2.85 seconds[/tex]

So she will cover 77 m in 2.85 seconds

 Now considering vertical motion, up direction as positive

    Initial velocity = 28 sin 15 = 7.25 m/s, acceleration =acceleration due to gravity = -9.8 [tex]m/s^2[/tex], time = 2.85

    Substituting

           [tex]s=7.25*2.85-\frac{1}{2}*9.8*2.85^2=20.69-39.80 =-10.11 m[/tex]

  So at time 2.85 stunt women is 10.11 m below from starting position, far side is 25 m lower. So she will be at higher position.

  So she will make the jump.

1. Tangential velocity:

e) the instantaneous velocity of a body moving in a circular path.

2. Parabolic pathway

c. a curved path followed by projectiles

3. Projectile

d) an object projected through space, traveling in two dimensions, that accelerates vertically due to gravity.

4. Centripetal acceleration

a) acceleration towards the center caused by the centripetal force

5. Centripetal force

b) a force which keeps a body moving with a uniform speed along a circular path and is directed along the radius towards the center

Both of the brothers performed work.  The one who pushed with a greater force did more work, and it had a positive sign.  The one who pushed with a smaller force did less work, and it was also technically "negative" work, because the motion of the fridge was in the direction opposite to his force.

Now that THAT's settled, they ought to quit fridging around, and get that thing moved like their father asked them to do.

Atomic number=Proton count

Atomic mass=Proton count+ neutron count

Neuton Count=Atomic mass-Proton count

Proton count=Atomic number=27

Mass number=74

Neuton count= 74-27=47

The kinetic energy of the particles is directly proportional to the thermal energy of the system. The correct options are Boiling Point; Decrease; Decrease; Vibrate in place respectively.

Therefore, the correct options are Boiling Point; Decrease; Decrease; Vibrate in place respectively.

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Your answer is B. Hope this helps! -John

Yes you are right but sometimes just because a number is  bigger doesnt always make it so.

When converted to the same units, 50 m/s is equivalent to 180 km/h, which is faster than 140 km/h.

To compare the speed of 50 m/s with 140 km/h, we need to convert them into the same units. We know that 1 m/s is equivalent to 3.6 km/h. Therefore, 50 m/s is equal to 50 imes 3.6 km/h, which is 180 km/h.

Comparing this with 140 km/h, we can see that 50 m/s (180 km/h) is indeed faster than 140 km/h.

The ball rises for v/g seconds; which equals 14.7/9.8=1.5 seconds . After this time, it’s height will be:

h(t)=g/2(1.5)²+14.7(1.5)

=-4.9 x 2.25 + 22.05

=11.025m

The ball then falls for 49+11.025=60.025m, which takes:

g/2t²=60.025

t²=12.25

t=3.5 secs

Total time: 1.5+3.5=5 seconds

Answer:

 A and C

Explanation:

 Kinetic energy of a body is given by the expression, [tex]KE =\frac{1}{2}mv^2[/tex], where v is the velocity and m is the mass of body.

 In case of a simple pendulum the maximum velocity is at it's stationary position.

So maximum velocity i at position C, which means maximum kinetic energy is at position A.

The velocity of pendulum reduces as the angle between vertical stationary and current position increases.

 So, velocity at E and A are the minimum, so at A and E the kinetic energy value is minimum.

 Now examining the options given, we will understand the kinetic energy increase is maximum in case of A and C.

Answer:A and C

Explanation:

Answer:

C) Amplitude.

Explanation:

By definition, the amplitude of wave is defined as the distance from the rest position to the highest or lowest point of the wave.

The highest and lowest points of the wave are called crests and troughs respectively; Therefore, the amplitude of the waves is also said to be the height of the wave from its rest position to its crest—and also the height of the from the rest position it its trough.

This means Choice C (amplitude) is the correct term used to describe the height of a wave from its rest position to its crest.

P.S: Choice A, the crest height, can also be the correct term, but the term ''amplitude'' is often used and is more technical.

The term for the height of a wave from its rest position to its crest is amplitude. Amplitude is half the distance from crest to trough, and it measures the displacement above or below the equilibrium point. Larger amplitudes correspond to waves with more energy.

The term used to describe the height of a wave from its rest position to its crest is amplitude. This is the characteristic height of the wave, above or below the equilibrium position. A wave's amplitude (A) measures the maximum displacement from this equilibrium position. The crest is the topmost point of the wave, while the trough is the lowest point. Importantly, the amplitude is often described as half the distance from crest to trough, emphasizing that it is the measure of displacement in one direction (either above or below the equilibrium).

The amplitude of a wave can impact its energy, with larger amplitudes indicating waves carrying more energy. Contrary to amplitude, wavelength is the distance between two consecutive crests or identical points in the wave pattern, and frequency refers to how many waves pass a given point in a certain amount of time.

To clarify using an example, if the amplitude of a water wave is 0.2 meters and its frequency is 2 hertz, a bird sitting on the water's surface would move up and down a distance of 0.4 meters (twice the amplitude) with every wave and it would do this twice every second (frequency).

Answer:

  Potential energy = 73.575 kJ

  Kinetic energy = 135kJ

  Total mechanical energy = 208.575 kJ

Explanation:

   The potential energy of a body is given by the expression, PE = mgh, where m is the mass of the body, g is the acceleration due to gravity value and h is the height of the body.

  The kinetic energy of a body is given by [tex]KE=\frac{1}{2} mv^2[/tex], where v is the velocity and m is the mass of body.

  Total mechanical energy = Kinetic energy + Potential energy

  [tex]KE=\frac{1}{2} mv^2=\frac{1}{2} *75*60^2= 135000J = 135kJ[/tex]

  PE = mgh = 75*9.81*100 = 73575 J = 73.575 kJ

  Total mechanical energy = Kinetic energy + Potential energy = 135+73.575

                                             = 208.575 kJ    

Average velocity has two parts:  Its magnitude (size) and its direction.

Its magnitude is

(straight-line distance between start-point and end-point, regardless of the route that's actually followed from start to finish) divided by (time taken to travel from start to finish).

Its direction is

(direction from start-point to end-point)

Notice that straight from this definition, the average velocity of going around a full circle is zero, no matter how fast you traveled.  That's because the size of the  average velocity is calculated from the straight-line distance from start-point to end-point, and that's zero if you finish at the same point you started from.

As density =mass/volume

Mass is measured in kilogram & volume measured in m^ 3

So the correct statements are given

Density is derived unit of measurement.

Density is ratio of mass to volume

Density is physical property of object.

Answer:

  Side of cube = 24 mm

Explanation:

   Usually gold price is represented for 8 g of gold = 300$

   Density of gold = 19.32 [tex]g/cm^3[/tex]

   Mass of gold for 10000$ = (10000/300)*8 = 266.67 g

   We have density = Mass/ Volume

   So volume = Mass/density = 266.67/19.32 = 13.80 [tex]cm^3[/tex] = 138000 [tex]mm^3[/tex]

   Volume of cube of gold = [tex]a^3[/tex], where a is the side of cube,

   So side of cube , a = [tex]\sqrt[3]{138000} =23.99 mm = 24 mm[/tex]

Pressure is (weight of the box) / (area under the bottom of the box). Neither of those quantities depends on the area of whatever is under the box. You could move the box from the deck of a battleship and put it on the kitchen table. The pressure it exerts doesn't change.

The new average pressure (P₂) is indeed 4 times the original average pressure (P₁). So, the answer would be 4p.

The average pressure exerted by an object on a surface is defined as the force applied perpendicular to the surface divided by the area over which the force is distributed. Mathematically, average pressure (P) can be represented as:

P = F / A

where F is the force and A is the area.

The original round sheet of wood first. When the box is resting on it, the force exerted by the box (weight) is the same regardless of the size of the sheet. However, the area over which this force is distributed will change when the sheet's diameter changes.

The area of the original round sheet of wood is A₁, and the area of the new sheet with half the diameter is A₂.

Since the force (F) is the same in both cases (as it depends on the weight of the box, which remains constant), we can write:

P₁ = F / A₁ (Original average pressure)

P₂= F / A₂. (New average pressure)

Now, know that the area of a circle is given by the formula:

A = πr²

where r is the radius of the circle.

If the diameter of the original sheet of wood is D, then the radius of the original sheet is D/2. The area A₁ can be represented as:

A₁ = π (D/2)² = πD² / 4

Now, for the new sheet with half the diameter, the new diameter would be D/2, and the radius of the new sheet is (D/2)/2 = D/4. The area A₂ can be represented as:

A₂ = π * (D/4)² = π * D² / 16

Now, let's compare the new average pressure (P₂) to the original average pressure (P₁):

P₂ = F / A₂ = F / (π * D² / 16) = 16F / π D²

Since the original average pressure (P₁) is P₁ = F / A₁ = F / (π * D² / 4) = 4F / π * D²

We can see that P₂ is 16 times larger than P₁:

P₂ / P₁ = (16F / π * D²) / (4F / π * D²) = 16

Therefore, the new average pressure (P₂) is indeed 4 times the original average pressure (P₁). So, the answer is indeed 4p.

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Answer:

zero.

Explanation:

The condition for an object to be in equilibrium is that there is no resulting force acting on it, in other words, that the force on the object is zero:

[tex]F=0[/tex]

and by Newton's second law we know that

[tex]F=ma[/tex]

where [tex]m[/tex] is the mass of the object, and [tex]a[/tex] its acceleration.

So combining the two things:

[tex]F=ma=0[/tex]

⇒[tex]ma=0[/tex], This equation is fulfilled when [tex]a=0[/tex]

Wich tells us that for the the block to be in equilibrium, the acceleration must be zero:

[tex]a=0[/tex]

If a block is in equilibrium the magnitude of the block's acceleration is 0m/s²

According to Newton's second law, the force acting on a body is equal to the product of its mass and acceleration.

Mathematically F = ma where:

m is the mass of the object

a is the acceleration of the object

If a block is in equilibrium, the magnitude of the force acting on the block will be 0, that is F = 0

Substituting F = 0 into the formula above to calculate the acceleration;

F = ma

0 = ma

Swap sides

ma = 0

a =0/m

a = 0m/s²

This shows that if a block is in equilibrium the magnitude of the block's acceleration is 0m/s²

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it got to be jumping jacks that all i got

Answer:

Explanation:

A common activities where cardiovascular and strength training are together is during Construction tasks. In this context, aerobic and anaerobic exercises are present.

Answer:

Explanation:

The ocean encloses a certain water activity, creating the Global Conveyor Belt, which is about the thermohaline circulation, which is a system of currents.

The Global Conveyor Belt is crucial to maintain nutrients and carbon dioxide cycles. There we have warm water and cold water, each contain different percentage of salt and other minerals. Basically, the cold water tend to sink under the warm water which has more salt and more ability to absorb heat. This sinking of the cold water is due to the difference of densities, warm water is less dense that cold water, and according to physics, less dense fluids float over denser fluids.

So, basically the difference of densities is what cause the sinking of the cold water.

Answer:

Elasticity and Density of the medium

Explanation:

Elastic properties relate to the tendency of a material to maintain its shape and not deform when a force is applied to it. A material such as steel will experience a smaller deformation than rubber when a force is applied to the materials. Steel is a rigid material while rubber deforms easily and is a more flexible material.

At the particle level, a rigid material is characterized by atoms and/or molecules with strong forces of attraction for each other. These forces can be thought of as springs that control how quickly the particles return to their original positions. Particles that return to their resting position quickly are ready to move again more quickly, and thus they can vibrate at higher speeds. Therefore, sound can travel faster through mediums with higher elastic properties (like steel) than it can through solids like rubber, which have lower elastic properties.

Density

The density of a medium affects the speed of sound. Density describes the mass of a substance per volume. A substance that is more dense per volume has more mass per volume. Usually, larger molecules have more mass. If a material is more dense because its molecules are larger, it will transmit sound slower. Sound waves are made up of kinetic energy. It takes more energy to make large molecules vibrate than it does to make smaller molecules vibrate.

high low ...lowish highish, min max

The answer for your question is true

Answer: True

Explanation:

Genes can be turned off and turned on based on the body function. The switching on and off of genes is a continuous process which takes place life long.

This turning off and on of genes is known as gene regulation which is responsible when the genes will be on and when the genes will be off.

The DNA in same it is the functional gene which makes the cell different. Hence, the given statement is True.