A projectile is fired from the ground at a velocity of 30.0 m/s, 35.0 º from the horizontal. What is the maximum height the projectile reaches in the air? How far away from the point it was fired does it hit the ground? What is the time the projectile is in the air?

Answer:

\(15\:\mathrm{J}\)

Explanation:

The potential energy of an object is given by \(PE=mgh\).

Recall that the weight of an object is equal to the force of gravity on the object. From this, we can set up the following equation and solve for the mass of the object:

\(F=mg,\\5=mg,\\m=\frac{5}{9.81}\approx 0.51\:\mathrm{kg}\)

Now we can plug in values to \(PE=mgh\) and solve:

\(PE=0.51\cdot9.81\cdot3=\fbox{$15\:\mathrm{J}$}\).

Answer:

The potential energy of the body is 15J.

Explanation:

The energy possessed to a body due to position is called Potential energy.

U=mgh

U=mgh

U=5×3=15J

Hence, the potential energy of the body is 15J.

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The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Maximum downdrafts in a microburst encounter may be as strong as 6,000 feet per minute (100 feet per second) for a brief period of time before decelerating to less than 1,000 feet per minute (16.7 feet per second) by the time they strike the ground.

In a microburst, a sudden and intense downdraft spreads out in all directions, causing wind shears that can be extremely hazardous to aircraft. The storm cells that produce microbursts typically have diameters of less than 2.5 miles (4 km) and lifetimes of less than 30 minutes.Microbursts are usually caused by very powerful thunderstorms, but they may also be caused by less intense rain showers.

They may develop as a result of the storm's updraft becoming too strong and creating a downdraft. The precipitation then drags the air down to the ground at an exceedingly high rate of speed.As a result of the wind shear that is created by microbursts, they are extremely hazardous to aviation.

They have been responsible for a number of aircraft accidents over the years. When a microburst encounters an aircraft on approach, it can cause the plane to suddenly lose altitude, making it extremely difficult to recover. T

he maximum downdrafts in a microburst encounter may be as strong as 6,000 feet per minute (100 feet per second) for a brief period of time before decelerating to less than 1,000 feet per minute (16.7 feet per second) by the time they strike the ground.

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Answer:

Measurement is inevitable because in every single thing we do we measure.for instance, if you are a family of four,the food prepared will be less than the food prepared for a family of about 15 people.this is measurement.if not so,the food prepared will go waste.again, the drugs prescribed by the doctor is measured to avoid over dose or under dose of medication.this can be harmful to ones health

Answer:

a

Explanation:

because it shows how this gets in

Answer:

a

Explanation:

I did this. already. good luck!

By Avogadro's number, the mass of Neon atom is 20 grams.

We need to know about Avogadro's number to solve this problem. Avogadro's number is the number that explains how many carbon atoms are in one mol. The Avogadro's number is

Na =  6,02 × 10²³ atoms / mol

From the question above, we know that

Mr = 20

N = 6,02 × 10²³ atoms

By using Avogadro's number, we can calculate how much Neon atoms

N = n . Na

6,02 × 10²³ = gr / Mr . 6,02 × 10²³

gr / 20 = 1

gr = 20 grams

Hence, the mass of Neon atom is 20 grams.

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Galileo taught us that if you roll a ball along a level surface it will keep rolling if friction is absent.

Galileo Galilei, an Italian scientist, and astronomer, made significant contributions to our understanding of the laws of motion and the behavior of objects. One of his important observations and teachings relates to the motion of a ball rolling along a level surface.

Galileo taught us that when a ball rolls along a level surface, it will continue rolling indefinitely, provided there is no external force acting upon it. This principle is known as the law of inertia, which states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In the case of a rolling ball, the ball experiences rolling resistance due to various factors such as friction and air resistance. However, if these forces are negligible or effectively canceled out, the ball will continue rolling without slowing down significantly.

Galileo's teachings challenged the prevailing notion at the time that objects needed a continuous force to remain in motion. He conducted experiments and made observations to demonstrate that objects in motion tend to remain in motion, even in the absence of an applied force.

This understanding of inertia and the motion of objects laid the foundation for Newton's laws of motion, which became fundamental principles in classical physics. Galileo's teachings on the motion of a rolling ball helped shape our understanding of the nature of motion and continue to be relevant in physics education and scientific research today.

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1.) The AMA is 2.5

2.) The VR is 5.

3.) The efficiency is 50%.

Given that the object has a weight of 250 N and the effort needed to push it up the ramp is 100 N, we can calculate the AMA as follows:

AMA = Load / Effort

AMA = 250 N / 100 N

AMA = 2.5

Therefore, the AMA is 2.5.

To calculate the VR, we need to find the distance moved by the effort and the distance moved by the load. The distance moved by the effort is the length of the ramp, which is 50 m. The distance moved by the load is the height it is raised, which is 10 m. Therefore, we have:

VR = Distance moved by effort / Distance moved by load

VR = 50 m / 10 m

VR = 5

Therefore, the VR is 5.

To calculate the efficiency, we need to find the work done by the load and the work done by the effort. The work done by the load is:

Work done by load = Load x Distance moved by load

Work done by load = 250 N x 10 m

Work done by load = 2,500 J

The work done by the effort is:

Work done by effort = Effort x Distance moved by effort

Work done by effort = 100 N x 50 m

Work done by effort = 5,000 J

Therefore, the efficiency is:

Efficiency = (Load x Distance moved by load) / (Effort x Distance moved by effort)

Efficiency = (2,500 J) / (5,000 J)

Efficiency = 0.5 or 50%

Therefore, the efficiency is 50%.

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Answer:

Explanation:

To find the volume of the object we use the formula

volume of object = final volume of water - initial volume of water

From the question

final volume of water = 86 mL

initial volume of water = 75 mL

So we have

volume of object = 86 - 75

We have the final answer as

Hope this helps you

Answer:

c.97.1j

Explanation:

yan po ang answer

Answer:

600000000 ergs

Explanation:

Formula - multiply the energy value by 1e+7

The initial velocity of the car when the brake was initially applied is 6.3 m/s.

option D is the correct answer.

The velocity of the car when the brake was initially applied is calculated as follows;

Mathematically, kinetic energy formula is given

K.E = ¹/₂mv²

where;

mv² = 2 K.E

v² = ( 2 K.E ) / ( m)

v = √ [  ( 2 K.E ) / ( m) ]

Substitute the given parameters and solve of the initial velocity of the car when the brake was applied.

v = √ [  ( 2 x 23,180 ) / ( 1168) ]

v = 6.3 m/s

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The complete question is below:

A 1,168-kg car comes to a stop without skidding. The car's brakes do -23,180 J of work

to stop the car.

Which of the following was the car's velocity when the brakes were initially applied?

A. 3.2 m/s

B. 1.7 m/s

C. 5.1 m/s

D. 6.3 m/s

Answer:

A I think hope it helps!!

Answer:

The acceleration is 14.28 km/h^2

Explanation:

Step one:

Given data

initial speed u= 0 km/h

final speed v= 140km/h

time t= 9.8 seconds

Required

The acceleration of the car

Step two:

From a= v-u/t

substitute

a= 140-0/9.8

a=140/9.8

a=14.28 km/h^2

Answer:

b ac power source

Explanation:

ieififuffucjcjcicogore8e8e9e9e9e9ew0ww0w0w

Answer:  B.

switch

Explanation: edmentum

Answer:

We have the position vector given in terms of time t. r(t) = t^3*i + t^2*j

To find the velocity vector we have to differentiate r(t) with respect to time.

r'(t) = 3t^2*i + 2t*j

The vector representing acceleration is the derivative of the position vector

r''(t) = 6t*i + 2*j

When time t = 2.

The velocity vector is 3*2^2*i + 2*2*j

=> 12*i + 4*j

The speed is the absolute value of the velocity vector or sqrt(12^2 + 4^2) = sqrt (144 + 16) = sqrt 160

The acceleration vector is 6*2*i + 2*j

=> 12*i + 2*j

The required acceleration at t=2 is 12*i + 2*j and the speed is sqrt 160.

Explanation:

Can I have thx and brainliest?

The term "inflation" refers to a sudden and extremely rapid expansion of the universe that occurred in a tiny fraction of a second during the universe's first second of existence.

This theory was proposed to address certain problems with the Big Bang theory, such as the horizon problem and the flatness problem. Inflation is thought to have caused the universe to expand exponentially, smoothing out irregularities and creating a relatively uniform distribution of matter and energy.

This allowed for the formation of large-scale structures like galaxies and clusters of galaxies. Inflation is supported by a variety of observations, including the cosmic microwave background radiation and the distribution of galaxies in the universe.

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The viscosity of the experimental lubricant is 83.63 cP. The calculated viscosity can be confirmed by comparing it with known viscosity values and conducting additional tests for validation.

To calculate the viscosity of the liquid, we can use the formula for terminal velocity in a viscous medium. The terminal velocity (V) is given by the equation V = (2/9)(g)(r^2)(ρb - ρl) / η, where g is the acceleration due to gravity, r is the radius of the ball, ρb is the density of the ball, ρl is the density of the liquid, and η is the viscosity of the liquid.

Rearranging the formula, we can solve for viscosity η, which gives us η = (2/9)(g)(r^2)(ρb - ρl) / V.

Plugging in the given values, we have g = 9.8 m/s^2, r = 0.001 m, ρb = 2120 kg/m^3 (converted from 2.12 g/cm³), ρl = 1060 kg/m^3 (converted from 1.06 g/cm³), and V = 0.0138 m/s (converted from 1.38 cm/s).

Substituting these values into the formula, we can calculate the viscosity in cP (centipoise) by multiplying the result by 1000, giving us 83.63 cP. To validate the calculated viscosity, it is important to compare it with known viscosity values for similar lubricants and conduct additional tests to ensure consistency and accuracy.

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Answer:

.

Explanation:

,.....................................

The type of sphere can have an effect on the time it takes for an object to travel a given distance, but the exact effect depends on the specifics of the situation and the forces acting on the object.

The type of sphere (e.g. solid, hollow, dense, lightweight, etc.) can have an effect on the time it takes for an object to travel a given distance. The exact effect depends on the specifics of the situation, such as the initial velocity of the object, the acceleration due to gravity, and any other forces that may be acting on the object. For example, a dense solid sphere will fall faster than a lightweight hollow sphere under the same conditions because it has a higher mass and is more affected by gravity. A dense solid sphere will also take less time to travel a given distance than a lightweight hollow sphere, assuming that both are dropped from the same height and are not subject to any air resistance. On the other hand, if the objects are rolling down a ramp or a surface with friction, the time to travel the distance could be influenced by other factors, such as the coefficient of friction between the sphere and the surface, the size and shape of the sphere, and the angle of the ramp.

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The correct answer is 2.8s

Explanation:

Q = energy applied

m = mass

C = specific heat

ΔT = delta T = change in temperature

Let's call the length of the race track as "x".

To solve for "x", we can use the formula:

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

Since the race ends in a tie, we know that Jan and Mary both took the same amount of time to run the race. Let's call this time "t".

\(\implies \text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x - 25}{7.5}\)

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x}{8.0}\)

Since both expressions represent the same time, we can set them equal to each other and solve for "x":

\(\implies \dfrac{x - 25}{7.5} = \dfrac{x}{8.0}\)

Multiplying both sides by 60 (the least common multiple of 7.5 and 8.0) to get rid of the decimals:

\(\implies 8(x - 25) = 7.5x\)

\(\implies 8x - 200 = 7.5x\)

\(\implies 0.5x = 200\)

\(\implies x = 400\)

\(\therefore\) The length of the race track is 400 meters.

\(\blue{\overline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\)

If both the force that acts on object and the time of impact are doubled, then,  E. the impulse is doubled (x2).

If both the force that acts on an object and the time of impact are doubled, then the impulse is also doubled. Impulse is defined as the product of force and time, so if both the force and time are doubled, the impulse will also be doubled.

Impulse = Force × Time

So, if Force' = 2 * Force and Time' = 2 * Time, then Impulse' = 2 * Force * 2 * Time = 4 * Force * Time = 4 * Impulse.

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Statements that are true about velocity are: 2. For velocity, you must have a number, a unit, and a direction and 4.The SI units of velocity are m/s.

Velocity is the rate at which displacement changes. Speed is a constant, but velocity is a vector quantity. It has both direction and magnitude, therefore this indicates. While seconds are the SI unit of time, meters are the SI unit of displacement. Meters per second will therefore be the SI units for velocity.

The direction speed of an item in motion as measure of the rate at which its location is changing as seen from certain point of view and as measured by specific unit of time is called velocity.

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Answer :

Imma just put it in the explanation

Explanation:

Electric to sound : Radio

Chemical to thermal+radiant+sound+kinetic : Fireworks

Gravitational to kinetic+sound : Waterfall

Chemical to thermal+kinetic : Drinking water (not sure what last answer is called but its supposed to match the girl drinking water lol)

hope this helps

The plane flies at speed of 160m/s should drop the package when it reaches at a distance of 824m.

A dropped object travels quickly in the direction of the earth's center. Newton's second law states that the net force applied on an object determines its acceleration. If air resistance is small, the gravitational force, which is also known as an object's weight (w), acts as the net force on any falling object.

Free-fall acceleration seems to be another name for gravitational acceleration. Gravitational fields established by masses pull other masses approach them.

\(h = ut + 1/2 gt^2 ; u=0130 = 1/2 \times 9.8 \times t^2t= 5.15sec\)

The packet travel with the time period of 5.15sec

The distance = v x t

                      160m/s x 5.15s = 824m

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