A train changes it’s speed from 3m/s to 17m/s in 2.0 seconds calculate its acceleration.

Answer:

V = 127.4 m/s

Explanation:

Using the following expression:

V = V₀ + a * t

Applying to vertical movement:

V = 0 + g * t  (Start at rest and a = g = 9.8 m/s²)

V = g * t

V = 9.8 * (13)

V = 127.4 m/s

Answer: The time it takes for the cart to roll down the ramp is dependent on the height of the ramp. This makes the time dependent on the height.

The number of protons that strikes the target is  1.7325 x 10²² protons.

The quantity of a charge is the amount of charge or electron flowing over a given period of time.

Mathematically, the quantity of a charge is given as;

Q = It

where;

Q = (126 A) x (22 s)

Q = 2,772 C

The charge of the proton is 2,772 C.

The number of protons in a 2,772 C charge is calculated as follows;

1.6 x 10⁻¹⁹ C ---------> 1 proton

2,772 C ---------------> ?

= (2,772 x proton) / (1.6 x 10⁻¹⁹)

= 1.7325 x 10²² protons

Thus, we can conclude that during a period of 22 seconds, a total of .7325 x 10²² protons struck the target.

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Fred's speed as relative to alice is V = 0.6873c.

Speed is defined as the distance covered in a unit of time. It is the rate of a moving object. The scalar quantity, or speed, is the size of the velocity vector. There is no direction to speed. When an object moves more slowly, it is thought to be traveling at a lower speed; when it moves more quickly, it is thought to be traveling at a higher speed.

Explanation

The formula below mentions the traditional way to determine an object's constant velocity while it is traveling straight.

r = d / t

where r stands for rate or speed (sometimes denoted as v, for velocity)

The distance traveled is d.

The motion's execution time is measured in t.

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   An object has positive acceleration if it is accelerating and travelling in the right direction.

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Assuming that  average speed are in kilo-metres per hour, the typical trip takes 2 hours and 20 minutes to complete.

Apply the following formula to this issue:

Total distance travelled minus total time taken equals average speed.

You must first determine the length of the trip travelled.

Total distance travelled minus total time taken equals average speed.

Therefore : d = average speed x time spent overall - rearranging

In other words, d = vt = 105 km/hr x 2.3333... hrs = 245 km

Find out how long the typical journey takes on Friday afternoon.

t = d/v - equation rearranged equals 245 km/67 km/h = 3.6567164.

18 hours equals 3 hours, 39 minutes (rounded to nearest whole minute)

You must now determine how much longer the Friday trip takes.

Duration: (3 hours and 39 minutes) - (2 hours and 20 minutes)

= 1 hour and 19 minutes

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There are three factors that affect gravitational potential energy:

Gravitational potential energy is potential energy an object holds when falls towards another object due to gravity.

for instance, if we lift a stone and try to throw it from a height, it will have gravitational potential energy whereas stones in the ground have no gravitational potential energy.

the formula of GPE:  E = mgh where

m = mass, g = gravity and h = height

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First, with m = 0.123 kg, pressure force, T = 255N, and length = 10 m, Using the formula V = ?, we've haste of 144 m/s.

After 20 milli alternate = 0.02 s, the first palpitation would have run along the line for

This means that it only left 10m-2.88 m = 7.12 m for the 2 pulsesto run.

therefore, the distance which the 2 beats will first meet would be

from the position where the first pulse is transferred.

exactly the same as the answer at the reverse)

remaining distance is divided by 2 as the 2 pulse are moving with the same speed towards each other.

Mass

Mass is the volume of matter in a physical body. It's also a measure of the body's indolence, the resistance to acceleration( change of haste) when a net force is applied. An object's mass also determines the strength of its gravitational magnet to other bodies.

The SI base unit of mass is the kilogram( kg). In drugs, mass isn't the same as weight, indeed though mass is frequently determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known millions. An object on the Moon would weigh lower than it does on Earth because of the lower graveness, but it would still have the same mass. This is because weight is a force, while mass is the property that( along with graveness) determines the strength of this force.

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you have too high of a spin rate with your driver and irons.

The faster the swing speed the longer the distance from the tee. Therefore, to get the ball as far down the fairway as possible, you need to swing as hard as possible without losing balance posture, or control of the club. A softer ball provides more control on off-center shots and more distance on low-impact shots. I downgraded it a bit due to the high price.

These Titleist Tour golf balls are perfect for the beginner golfer who needs a lot of forgiveness on their shots. All in all the Pro is a seasoned athlete who hits the ball so far because he plays on the courts in the best possible conditions. Athletic golf skill maximizes swing speed, thereby maximizing distance. Fairway agronomy, on the other hand, pushes the ball farther. The reason taller golfers hit longer is primarily that their size provides a framework for greater leverage with more muscles and joints.

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Answer:

colder because of moisture

The temperature of the lower-temperature reservoir in the Carnot engine is 266 K, while the temperature of the higher-temperature reservoir is 341 K.

This is basically a two unknowns problem. If we mark the temperature of the higher-temperature reservoir as H (for hot) and the temperature of the lower-temperature reservoir as C (for cold), we know the following:

H - C = 75.0 °C = 75 K,

and the efficiency of Carnot engine is calculated in the following manner:

0.22 = 1 - C/H ⇒ C/H = 1 - 0.22 = 0.78 ⇒ C = 0.78H

Now we use that in the first equation:

H - 0.78H = 75.0 K = 0.22H ⇒ H = 75.0 K / 0.22 = 341 K

C = 0.78H = 0.78 * 341 K = 266 K

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The meter stick is the center of mass of the three mass system is at 83cm.

The center of mass is a location determined in respect to an object or group of things. It represents the average location of the system, weighted by the mass of each component.

The center of mass of the three mass system is at 83cm

The mass of the meter stick is:

M = 0.5kg.

Since the meter stick is uniform, the center of mass of the meter stick is at 50cm or 0.5m.

Let the distance of the meter stick's center of mass from 0cm be x1. Then x1 = 0.5m.

Now a mass m2 = 1kg is attached at 50cm mark.

So the distance of m2 from 0cm is x2 = 50cm = 0.5m.

Similarly a mass m3 = 3kg is attached at the every end or 100cm mark. So the distance of m3 from 0cm is x3 = 100cm = 1m.

Now the position of the three mass system from 0cm is given by,

[tex]$X_{C M}=\frac{M x_1+m_2 x_2+m_3 x_3}{M+m_2+m_3}$[/tex]

[tex]$X_{C M}=\frac{0.5 \times 0.5+1 \times 0.5+3 \times 1}{0.5+1+3}$[/tex]

[tex]$X_{C M}$[/tex] = 3.75/4.5 =0.83 = 83cm

So the center of mass of the three mass system is at 83cm.

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The final velocity of the rocket when it hits the ground is 71 m/s.

The final speed of the rocket will help us to determine how fast it is falling when it hits the ground.

Apply the following kinematic equation to determine the final velocity of the rocket

v = u + gt

where;

v = 22 m/s  +  (9.8 m/s²) x (5 s)

v = 22 m/s  +  49 m/s

v = 71  m/s

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The value of the normal force is 3.9x10^2

Using the formula for friction,

Ff = UsN

Where

Us is the coefficient of static friction.

N is the normal force.

To get the crate moving, enough force must be applied to overcome the static friction:

Fapplied = Ff

Since Fapplied = 43 Newtons:

43 = UsN

Us = 0.11, so all you have to do is isolate N by dividing both sides by 0.11

43/0.11 = N = 390.9 which is approximately 391 = 3.9x10^2

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Answer:

See image

Explanation:

Plato

115 kilos are given to us as m r, so m r equals m t. T is stated as 115 kilos when T is 4.5 meters per second divided by the combined velocity, which is 2.6 meters per second. This now weighs 84.04 kilos. As a result, the receiver's mass, m r, is determined to be 84 kilograms.

We are provided the tackler's mass, m, which is 120 kilos. A tackle moves at a speed of 4.4 meters per second. The combined velocity of the tackler and the receiver, designated as b r, is now given as 0 meters per second.

Let's say it's indicated as 3 m/sec since, based on the principle of momentum conservation, we know that the system's initial and end linear moments should be equal. The initial momentum is now m r v, r plus m t v, t equals m r plus m t, which is the combined mass into v, and this term now goes to zero since we are as zero, which is the initial velocity of the receiver. This phrase ends at 0. Now that t = m r + m t into v, we obtain m t v.

Now, if we rearrange this, we obtain m r = m t v, t by v, and m t less. Sorry, minus m t, so m r equals m t v, t by v minus m t, and now enter all the given values into v. For example, 115 kilos are given to us as m r, so m r equals m t. T is stated as 115 kilos when T is 4.5 meters per second divided by the combined velocity, which is 2.6 meters per second. This now weighs 84.04 kilos. As a result, the receiver's mass, m r, is determined to be 84 kilograms.

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Answer:

See below

Explanation:

x = time     y = position (displacemet)

The minimum horizontal speed with which the cat must jump off the first roof in order to make it to the other is 12.82 m/s.

The time of motion of the dog's jump is calculated as follows;

Apply the following kinematic equation and determine the time of motion of the cat's Jump.

h = vt + ¹/₂gt²

where;

h = ¹/₂gt²

2h = gt²

t² = 2h/g

t = √(2h/g)

t = √(2 x 3 / 9.8)

t = 0.78 second

The minimum horizontal distance traveled by the cat is calculated as follows;

x = Vt

where;

V = x/t

V = (10 m) / (0.78 s)

V = 12.82 m/s

Thus, the minimum horizontal speed with which the cat must jump off the first roof in order to make it to the other is determined by applying the formula for range of a projectile.

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Answer:

Potential Energy.

Explanation:

Kinetic Energy is when an object is moving and it's the speed when it's released but Potential Energy is when the object is stand still/at rest, like the arrow, as the archer holds the arrow back.

When both boats have the same kinetic energy and are traveling at the same speed, the iceboat reaches the finish line first.

Since the kinetic energy saved will be the same for both icebergs in this situation,

This: F *x

F is equal to force due to the wind.

where x is the same for the two icebergs as the distance to the goal. Consequently, even if the velocities may differ, the kinetic energy in the end will be the same.

The square speed of the heavier boat must be equal to the square speed of the lighter boat for the kinetic relation to hold true, and both boats will reach the finish line with the same kinetic energy.

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The force exerted by the string on the ball does not do work on the ball if a ball is twirled in a circle at the end of a string.

W = F d cos θ

F = Force

d = Displacement

θ = Angle between applied force and displacement

If the string provides centripetal force, the force is acting towards the end of string that is constant. The direction is always tangential to the circular motion.

θ = 90°

W = 0

The work done is maximum when the force vector and displacement act in the same direction. Because if they both act in same direction, θ = 0° and W = F d cos 0° = F * d

Therefore, the force exerted by the string on the ball does not do work on the ball in this situation.

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The time is defined as Delta X, or 1600 meters, because the speed is 5.55 meters per second. 288 seconds have now elapsed.

In this activity, we'll discuss uniform motion with constant speed. Keep in mind that the velocity is the same as the delta X. This is the distance divided by the time component, Delta T. And what we have is a runner who completes a 100-meter run in 18 seconds.

As a result, our objective is to assume that they want to maintain the same speed as she did in the first 100 meters and in question A. We must ascertain the runner's time requirement as well. We have traveled 400 meters. So let's figure out the speed first. The runner's speed v.

The attacks are comparable to this. The body is 100 m without a T, there are no taxes, and tea is served in 18 seconds. We therefore equal 72. I apologize. Yes, to reach a speed of 5.56 m/s.

That's not to imply that the T is prime. What we are trying to determine is what is equivalent to Delta X Prime divided by V. This distance, 400 meters, is calculated by dividing it by the assumed speed of 5.56 meters per second, which is the same as before. So, 72 seconds passed. Any inquiries? I have to wait to see how long the runner needs. True on, say, one mile away. Recall that 1600 meters make up one mile.

Since the speed is 5.55 meters per second, the time is defined as Delta X, or 1600 meters. So, 288 seconds have passed. You finish their exercise, I see.

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Answer:t = 1603/(100/21)

                   = 337.89 sec

Explanation:

t1 = 21 sec,     x1=100m

speed= x/t1 = 100/21

 x2= 300 m.

t2= x2/(x1/t)

    =300/(100/21)

    =63 sec

1 mile = 1603 m

t = 1603/(100/21)

=  337.89 sec

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So there are two types of friction one is kinetic friction which acts when car skid on icy pavement and other is rolling friction which acts which helps tire to roll along the surface now as we know that coefficient of rolling friction μr is greater than coefficient of kinetic friction μk  .

So due to which friction force will be more effective when tire rolls along the surface not skid so in order to stop car in minimum distance possible on icy pavement should apply brakes more gently.

Kinetic friction is defined as a force that acts between shifting surfaces. A body moving at the floor reviews a force in the opposite direction of its motion. The importance of the force will rely on the coefficient of kinetic friction among the two materials.

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If you walk due south from (60,40,966), we will ascend at the rate of 0.8. The location of something in relation to another is referred to as its direction.

To create the resulting vector, two vectors facing the opposite direction are subtracted from one another. Here, the vector B runs counterclockwise to the vector A, and the resulting vector R is

Consider,

z=1000−0.005x2−0.01y2∇f(x,y)

=⟨fx,fy⟩fx

=∂/∂x(1000−0.005x2−0.01y2)

=−0.01xfx

=∂/∂y(1000−0.005x2−0.01y2)

=−0.02y

Therefore,

∇f(x,y)

=⟨−0.01x,−0.02y⟩

At (60,40),∇f(60,40)

=⟨−0.01(60),−0.02(40)

=⟨−0.6,−0.8⟩

If you walk due south, the unit vector in the direction is

u=−j or ⟨1,−1⟩

Du(60,80)

=∇f(60,40)⋅⟨1, −1⟩

=⟨−0.6,−0.8⟩.⟨1,−1⟩=0.8

Therefore, if you walk due south from (60,40,966), we will ascend at the rate of0.8

The complete question is- Suppose that you are climbing a hill whose shape is given by z=934−0.06x2−0.1y2, and that you are at the point (80,50,300) In which direction (unit vector) should you proceed initially in order to reach the top of the hill fastest?

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A. "Strong emotions can impact the heart rate."

An elevated heart rate, or tachycardia, can occur for any reason.

Exercise-induced or stress-related heart rate increases are two possible causes (sinus tachycardia).

Sinus tachycardia is not seen as an illness but rather a symptom.

Another factor contributing to tachycardia is an unsteady heartbeat (arrhythmia).

Heart problems and stress

Adrenaline and cortisol are two of these hormones. They get your body ready to handle stress. To help move blood to the body's center, they make your heart beat more quickly and your blood arteries shrink. Your blood pressure and blood sugar levels are also elevated by the hormones.

Heart palpitations and anxiousness are common side effects. The autonomic nervous system's "fight or flight" reaction is triggered by anxiety (ANS). Your ANS engages when you feel concerned about a circumstance, raising your heart rate.

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Answer:

use the equations of motion

Based on the fact that he didn't write the number down, the statement  "He is not very likely to remember this phone number later in the evening because of this strategy. " is True

This is further explained below.

Generally, While DeWayne's strategy is eating at a restaurant, he meets a potential employer who provides him with his phone number.

Because he does not have anything with which to write, he must recite the telephone number to himself many times in order to commit it to memory.

In conclusion,  It is quite improbable that he will remember this phone number later on in the evening if you use this strategy.

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Im not sure but no one can kek lskhd. akshd

The force acting on the object will be 32 N.

Newton's second law of motion states that, "the force is equal to the change in momentum per change in the time". The mathematical form of the law is given below.

[tex]F = \frac{dP}{dt}=\frac{d(mv)}{dt}=m\frac{dv}{dt}=ma[/tex]

Where P = momentum, t = time, m =mass, v = velocity, a = acceleration and F = force.

The mass of the object is 4 kg and acceleration is 8 m/s^2. Substitute the values in the equation and we will get the force.

F = ma

F = 4 kg * 8 m/s^2

F = 32 kg.m/s^2

F = 32 N

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The rock will travel 25m horizontally with an initial velocity of 5m/s.

The height of the cliff is 125 meters.

Let 'x' be the horizontal distance travelled by the rock when thrown from the cliff.

Vₕ = horizontal velocity of the rock

T = total time of flight of the rock

Therefore, we know x = Vₕ × T

x = 5 × 5

x = 25

So, the horizontal distance travelled by the rock is 25 meters.

Now to find the height of the cliff, we can use one of the equations of motion,

H = uT+ ½gt²

Therefore equating all the given values in the above equation;

H = 0 + ½gt² (since u=0, initial vertical speed)

H = ½×10×(5)²

H = 5 × 25

H = 125m

So, the height of the cliff is 125 meters.

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Visible light is known as the fragment which is the part of electromagnetic spectrum that can be seen by humans.

The wavelength and frequency of light that is visible are 400nm to 700nm and  400THz to 800THz respectively. As we know, living beings are blind to a number of wavelengths of light, but it can be detected by specific instruments. But we can perceive easily that our world is aligned around this light.

For example, the sun is natural visible light. Everything around us that we’re able to see is a reflection of sunlight falling off the objects. Colour of any object that we’re able to see is actually just a reflection of light and other than that, all other colours get absorbed.

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