Define measurement.​

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

where

f is the force

m is the mass

From the question

f = 140 N

m = 70 kg

We have

\(a = \frac{140}{70} = \frac{14}{7} \\ \)

We have the final answer as

Hope this helps you

Answer:

v=u+at

30=0+a×12

30=12a

a=\(\frac{30}{12}\)

a=2.5ms⁻²

Answer:

2.5 m/s^2

Explanation:

There is this thing in Physics called the BIG 4 equations that help us determine one or more of the missing variables. In this case, we know the initial velocity, final velocity, and time. We're asked to find the acceleration.

This equation has all the criteria to find acceleration:

Vf = at + Vi    --->  Final Velocity is equal to acceleration times time plus initial velocity

Plugging in the values and using algebra, we can find the acceleration.

30 = 12a + 0

a = 2.5

Answer: the answer is b “The warmer a region of the atmosphere is, the more infared radiation it emits”

Explanation:

Answer:

a

Explanation:

i got it right

The maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

To calculate the maximum possible speed of the train at the end of the first 4.0 km of the journey, we can apply the principle of conservation of energy.

Assuming there are no external forces like friction or air resistance, the initial potential energy of the train will be converted into kinetic energy.

The potential energy (PE) of the train at the beginning of the journey can be calculated as PE = mgh, where m is the mass of the train, g is the acceleration due to gravity (approximately \(9.8 m/s^2\)), and h is the height difference (in this case, we assume it to be zero).

The kinetic energy (KE) of the train at the end of the 4.0 km journey can be calculated as \(KE = (1/2)mv^2\), where v is the velocity of the train.

Since the potential energy is converted into kinetic energy, we can equate the two expressions:

PE = KE

\(mgh = (1/2)mv^2\)

Simplifying and canceling out the mass:

\(gh = (1/2)v^2\)

Substituting the values, \(g = 9.8 m/s^2\)and h = 0, we get:

\((9.8 m/s^2)(0) = (1/2)v^2\)

Simplifying further:

\(0 = (1/2)v^2\)

This equation tells us that the maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

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When a thing gains electrons in electricity, it'll become negatively charged. The collection of phenomena known as electricity is related to the existence and mobility of matter that possesses an electric charge.

The movement of electricity generation or charge is known as electricity. It is a sustainable energy source, meaning that we obtain it through the conversion of main energy sources like coal, fossil fuels, oil, nuclear power, and many other essential minerals.

In accordance with the U.S. Energy Management Administration, coal, nuclear power, and natural gas made up the majority of the country's electrical generation in 2020. Sources of renewable energy like wind, electricity, solar, biomass, wind, and groundwater are also used to generate electricity.

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Answer:

weight.................

Ultra = X-ray

Explanation:

how are things going to paint the roof for beginners painting and decorating the whole house so I'm going away with a few sports mates for a couple nights for beginners but will have a look painting at a time and see what is going to be Strong enough

The jet plane emits 149 914 decibels at 8.2 .

What is the jet plane?

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Answer:

Reproduction

Explanation:

because reproduction produces variation within the species allowing the species to survive selection

Answer: D = reproduction

Explanation:

Answer:

An increase in the mass on the string will cause an increase in the period.

Explanation:

We'll begin by writing an expression showing the relationship between the period and mass. This is shown below:

T = 2π√(m/K)

Where:

T is the period of oscillation.

m is the mass of the object.

K is the spring constant.

T = 2π√(m/K)

From the above formula:

The period (T) is directly proportional to the square root of mass (m) and inversely proportional to the square root of the spring constant (K). This implies that an increase in the mass of the object on the spring will result in an increase in the period of oscillation and a decrease in the mass of the object will also decrease the period of oscillation.

Answer:

Mass, m = 32 kg

Explanation:

Given that,

Force, F = 2000 N

The change in velocity, (v-u) = 50 m/s

Time, t = 0.8 s

We need to find the mass of the ball. The net force acting on an object is given by :

F = ma

Where a is acceleration

\(F=\dfrac{m(v-u)}{t}\\\\m=\dfrac{Ft}{(v-u)}\\\\m=\dfrac{2000\times 0.8}{50}\\\\m=32\ kg\)

So, the mass of the ball is 32 kg.

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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A) Angular acceleration = -2.47 rad/s²

B) 23.54 seconds

C) The total distance covered = 294.23m

The number of revolutions = 62

Angular distance, θ = 62 x 2π

θ = 62 x 2 x 3.142

θ = 389.608 radians

Diameter, d = 0.86 m

Radius, r = d/2 = 0.86/2

r = 0.43m

Initial velocity, v₁ = 90 km/h = 90 x (1000/3600)

v₁ = 25 m/s

Angular velocity, w₁ = v₁ / r

w₁ = 25/0.43

w₁ = 58.14 rad/s

Final velocity, v₂ = 59 km/h = 59 x (1000/3600)

v₂ = 16.39 m/s

Angular velocity, w₂ = v₂ / r

w₂ = 16.39 / 0.43

w₂ = 38.12 rad/s

Using the equation of motion:

Angular acceleration = -2.47 rad/s²

B) Amount of time required for the car to stop if it continues to decelerate at this rate

Initial angular speed, w₁ = 58.14 rad/s

When the car stops, final angular speed, w₂ = 0 rad/s

Using the equation of motion below:

C) The total distance

Use the equation of motion below:

The total distance covered = 294.23m

The magnitude of the force of static friction acting on the box is 75 N. Option D is correct.

What is static friction?

It is the frictional force between the two solid objects that are attached to each other.

It can be given by

\(F_s = mg \rm \ sin \theta\)

Where,

\(F_s\) - static friction

\(mg\) - gravitational force =  112. 1 N

\(\theta\) - inclined angle  = 42°

Put the values in the formula,

Fs = 112.1   x   sin42°

Fs = 75 N

Therefore, the magnitude of the force of static friction acting on the box is 75 N.

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when you’re trying to ollie higher, your front foot will be slightly farther back than it normally is. this lets you drag more on the board, helping you get the height you need. hope this helped :)

Answer: I had the same problem if I was you I would use my phone and record a slowdown of your ollie. Also pop hard and focus on how much  you jump, your ollie is only going to go as high as you jump so try to get some Hight also do moving first it helps in the long run trust if you dont its just as hard as learning how to ollie in the first place.

Explanation: keep riding I hope the best

Answer:

The final angular speed is 16.1 rad/s

Explanation:

Given;

initial moment of inertia, I₁ = 2.56 kg.m²

final moment of inertia, I₂ = 0.40 kg.m²

initial angular speed, ω₁ = 0.4 rev/s = 2.514 rad/s

Apply the principle of conservation of angular momentum;

I₁ω₁ = I₂ω₂

where;

ω₂ is the final angular speed

ω₂ = (I₁ω₁) / (I₂)

ω₂ = (2.56 x 2.514) / (0.4)

ω₂ = 16.1 rad/s

Therefore, the final angular speed is 16.1 rad/s

Power= 0.6521739130434783 Watts

Power is the amount of energy transferred or converted per unit time. The unit of power is watt, that is equal to one joule per second. Power is a scalar quantity.

Power = work/time,

P = w/t,

w = 15 joules

t = 23 seconds

P = 15/23

  = 0.6521739130434783 Watts

Work is measured in joules and Time is measured in seconds.

Therefore, power is 0.6521739130434783 Watts.

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We will have the following:

So, the nergy is 2.3 J.

The surprising aspect of the discovered extrasolar planets is their abundance and diversity, challenging the notion of our solar system's uniqueness and revealing the existence of a wide range of planetary systems.

The discovery of thousands of extrasolar planets has shattered the previous belief that our solar system is an exception. The sheer number of exoplanets, ranging from rocky super-Earths to gas giants, suggests that planetary systems are a common occurrence in the universe. Moreover, the identification of exoplanets with unusual characteristics, such as "hot Jupiters" orbiting close to their stars or "rogue" planets drifting through interstellar space, has expanded our understanding of planetary formation and dynamics. These findings not only challenge our existing models but also provide invaluable insights into the incredible diversity of planetary systems beyond our own. The study of exoplanets continues to surprise and reshape our understanding of the cosmos.

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Answer: D. Increasing in randomness.

Explanation: The concept related to this change is entropy. Entropy is a measure of the randomness or disorder in a system. According to the second law of thermodynamics, the entropy of an isolated system tends to increase over time. This means that natural processes often lead to an increase in randomness or disorder.

For example, imagine a container of gas molecules. Initially, the molecules may be confined to one side of the container, creating a region of higher concentration. However, over time, the gas molecules will naturally spread out and become more evenly distributed throughout the container. This increase in randomness or disorder corresponds to an increase in entropy.

To convert the distance between the atoms of H-Cl from angstroms (Å) to meters, you can follow these steps:

Step 1: Understand the conversion factor
1 angstrom (Å) is equal to 1 x 10^-10 meters.

Step 2: Identify the given distance
The given distance between the atoms of H-Cl is 1.27 Å.

Step 3: Apply the conversion factor
To convert the distance from Å to meters, you can use the conversion factor mentioned in step 1:
Distance in meters = 1.27 Å × (1 x 10^-10 meters/Å)

Step 4: Calculate the result
By multiplying the given distance with the conversion factor, you will get:
Distance in meters = 1.27 × 10^-10 meters

So, the distance between the atoms of H-Cl in meters is 1.27 × 10^-10 meters.

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Explanation:

this is the answer. it's correct

Answer:

I think it's moving towards the reference point

The time taken for throwing the ball up in the air and then catching it is 9/25 s. The correct option is 9/25 s.

To determine how long the ball takes according to you, we can use the concept of time dilation in special relativity.

Speed of the train relative to you: v = 4/5c (where c is the speed of light)

Time taken by the passenger (according to their wristwatch): t_p = 3/5 s

The time observed by you (t) can be calculated using the time dilation formula:

t = t_p / γ

where γ is the Lorentz factor, given by:

γ = 1 / sqrt(1 - (v² / c²))

Substituting the values:

v = 4/5c, c = speed of light

γ = 1 / sqrt(1 - (4/5)²)

Simplifying the expression:

γ = 5/3

Now, we can calculate the observed time (t):

t = (3/5) / (5/3)

t = (3/5) * (3/5)

t = 9/25 s

Therefore, according to you, it takes 9/25 s for the ball to be thrown up and caught.

So, the correct option is 9/25 s.

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The speed of the 1.2 kg block after the spring is released is 3 m/s to the left.

According to the question, a 1.2 kg block and a 1.8 kg block are initially at rest on a frictionless, horizontal surface. When a compressed spring between the blocks is released, the 1.8 kg block moves to the right at 2.0 m/s as shown. We need to determine the speed of the 1.2 kg block after the spring is released.The system's initial momentum is zero since the blocks are at rest. The system's final momentum is made up of the 1.2 kg and 1.8 kg blocks' respective momenta. As a result, the conservation of momentum equation becomes:m1i * v1i + m2i * v2i = m1f * v1f + m2f * v2fWhere m1i * v1i is the 1.2 kg block's initial momentum, m2i * v2i is the 1.8 kg block's initial momentum, m1f * v1f is the 1.2 kg block's final momentum, and m2f * v2f is the 1.8 kg block's final momentum.

As the 1.8 kg block moves to the right at 2.0 m/s after the spring is released, its momentum is:m2i * v2i = 1.8 kg * 0 m/s = 0 kg * m/sm2f * v2f = 1.8 kg * 2 m/s = 3.6 kg * m/sTo calculate the final momentum of the 1.2 kg block, we must first determine its final velocity. We can rearrange the conservation of momentum equation above to solve for v1f:m1f * v1f = m1i * v1i + m2i * v2i - m2f * v2fv1f = (m1i * v1i + m2i * v2i - m2f * v2f) / m1fPlugging in the values:v1f = (1.2 kg * 0 m/s + 1.8 kg * 0 m/s - 1.8 kg * 2 m/s) / 1.2 kgv1f = -3 m/s. Therefore, the speed of the 1.2 kg block after the spring is released is 3 m/s to the left.

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"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."

The quotation that addresses the audience's concern about President Obama taking actions at the end of his term while waiting for President Trump to take office is:

"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."

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The present value of $2,000 to be received four years from now will decreases with increase in the discount rate.

This is because the discount rate represents the opportunity cost of money - in other words, the rate of return that could be earned by investing the money elsewhere.

When you calculate the present value of a future sum of money, you discount it back to the present using the discount rate. The more the discount rate, the high the future cash flow is discounted, and the lesser its present value.

For example, let's say the discount rate is 5% per year. The present value of $2,000 to be received four years from now would be

PV = $2,000 / \((1+0.05)^{4}\)

PV = $2,000 / 1.2155

PV = $1,646.57

Now let's say the discount rate increases to 10% per year. The present value of the same $2,000 cash flow would be

PV = $2,000 / \((1+0.1)^{4}\)

PV = $2,000 / 1.4641

PV = $1,364.87

As you can see, the present value has decreased from $1,646.57 to $1,364.87 as the discount rate has increased from 5% to 10%. This is because the higher discount rate reduces the value of future cash flows in today's dollars.

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