A particular spring has a spring constant of 25 N/m.
Calculate the energy stored when the spring is extended by 15 mm.
Give your answer in standard form, to 3 significant figures.

Answer:

tourette syndrom

Explanation:

in the 2nd they go into detail about tourette syndrome and in the 2nd they dont talk about any of the other options

Answer:

A

Explanation:

I did it in edge and got 100

Answer:

Sodium is stored under paraffin oil

Explanation:

Group 1 metals are known to be very highly reactive. The chemical reactivity of the members of the group decreases down the group.

Sodium reacts violently with water and upon exposure to the atmosphere. As a result of this, it must be stored under paraffin oil.

Answer:

Amplitude

Explanation:

The amount of energy a wave carries is determined by the amplitude. The larger the amplitude, the more energy the wave has, and the smaller the amplitude, the less energy the wave has.

In this case, since wave A has more energy than wave B, wave B must have a smaller amplitude than wave A.

Let me know if this helps!

Answer:

[tex]a = 0.83\ m/s^2[/tex]

Explanation:

Uniform Acceleration

When an object changes its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

[tex]v_f=v_o+a.t[/tex]

Where:

vf  = Final speed

vo = Initial speed

a   = Constant acceleration

t   = Elapsed time

It's known a train moves from rest (vo=0) to a speed of vf=25 m/s in t=30 seconds. It's required to calculate the acceleration.

Solving for a:

[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]

Substituting:

[tex]\displaystyle a=\frac{25-0}{30}[/tex]

[tex]\boxed{a = 0.83\ m/s^2}[/tex]

Answer:

3.3kg

Explanation:

Given parameters:

Spring constant = 400N/m

Extension  = 8cm  = 0.08m

Unknown:

Amount of mass the spring is supporting  = ?

Solution:

To solve this problem:

     F  = kE

F is the force

k is the spring constant

E is the extension

  So;

            F  = 400 x 0.08  = 32N

Mass;

       Force  = mass x acceleration due to gravity

          32  = mass x 9.8

  Mass = 3.3kg

The mass the spring is supporting is 3.27 Kg.

We'll begin by calculating the force acting on the spring.

F = Ke

F = 400 × 0.08

F = 32 N

Finally, we shall determine the mass. This can be obtained as follow:

m = F / g

m = 32 / 9.8

m = 3.27 Kg

Therefore, the mass the spring is supporting is 3.27 Kg

Learn more about spring constant:

https://brainly.com/question/13511965

Explanation:

Question 4

Force is represented using letter F

the force formula f = ma

Question 5

mass = 0.43kg

acceleration = 49.4m/s²

Force = ?

Remember that force F = ma

Now substitute, F = 0.43 × 49.4 = 21.2N

Answer:

hmmmm

Explanation:

Answer:

8.09

Explanation:

Use: s = ut + 1/2at^2

s = displacement

u = initial velocity

a = acceleration

t = time

Plug in numbers and get: 8.09

Answer:

The answer is C. The electromagnetic waves transfer energy.

The electromagnetic waves cause a disturbance in the electric and magnetic field as the electromagnetic waves transfer energy. Thus, the correct option is C.

The electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field. These waves propagate through space and carry momentum and electromagnetic radiant energy as well. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. All of these waves form together different parts of the electromagnetic spectrum.

Electromagnetic waves or the EM waves are waves which are created as a result of vibrations between an electric field and a magnetic field. Electromagnetic waves are composed of oscillating magnetic and electric field lines and transmit energy.

Therefore, the correct option is C.

Learn more about Electromagnetic waves here:

https://brainly.com/question/3101711

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Answer:

4.1s

Explanation:

Given parameters:

Force applied  = 1.26 x 10⁴ N

Mass of the truck  = 2.3 x 10³kg

Speed of the truck  = 22.2m/s

Unknown:

The time it will take to stop the truck  = ?

Solution:

To solve this problem, we must understand that the momentum must be conserved.

 So;

      Momentum of the truck  = Impulse applied on it

              mass x velocity  = Force x time taken

So;

      Time taken  = [tex]\frac{nass x velocity }{force }[/tex]    = [tex]\frac{2300 x 22.2 }{12600}[/tex]   = 4.1s

Answer:

Air can't hold as much water when air pressure drops. The vapor becomes small water droplets or ice crystals and a cloud is formed.

Explanation:

Answer:

1/12

Explanation:

[tex]\frac{2}{9}[/tex]÷[tex]\frac{4}{1}[/tex]

Cross multiply

[tex]\frac{2}{9}[/tex]×[tex]\frac{1}{4}[/tex]

=[tex]\frac{3}{36}[/tex] then simplify to 1/12

Answer:

C. Chemical reactions create new atoms, which will increase the mass of the substance.​

Explanation:

It is not true that according to the Law of conservation of mass that mass of the substance will increase during chemical reactions.

During a chemical reaction, new atoms are not being created. The atoms of the reactant simply recombines to given a different product or compound. The atoms are still the same only the compound or product form differs.

According to the law of conservation of mass "in a chemical change, matter is neither created nor destroyed but bonds are broken and atoms combine".

By virtue of this, chemical reactions conserves mass so that the mass we start with is the same we end with since no new matter is destroyed nor created.

Answer:

Kundan should sit at more that 2.5 meters from the location of the fulcrum on the side opposite to the side where Bijaya sits

Explanation:

The given parameters are;

The weight of Kundan, F₁ = 200 N

The weight of Bijaya, F₂ = 500 N

The distance of Bijaya from the fulcrum, d₂ = 1 m

Therefore, for Kundan to lift Bijaya, Kundan should sit at a location further than the point where both the moment of Bijaya and Kundan about the fulcrum are equal

Moment of a force, M = The magnitude of the force, F × The perpendicular distance to the point at which the force acts, d

At equilibrium, the sum of the clockwise moment = The sum of the anticlockwise moment

Taking the moment of Kundan as being in the anticlockwise direction and the moment of Bijaya as acting in the clockwise direction, we have;

F₁ × d₁ = F₂ × d₂

∴ 200 N × d₁ = 500 N × 1 m

d₁ = 500 N·m/(200 N) = 2.5 m

Therefore, when Kundan sits at the point d₁ = 2.5 m, away from the fulcrum on one side of the sea saw and Bijaya sits at the point 1 m from the fulcrum on the other side of the sea saw, both Kundan and Bijaya will have the same moment

For Kundan to lift Bijaya, therefore, Kundan as to sit at a point further than 2.5 m from the fulcrum on the opposite side of the fulcrum from Bijaya.

Answer:

C

Explanation: Study Island

Answer:

The Straight Line Graph

Explanation:

Answer:

Explanation:

c

Answer:

Dogs are able to hear much higher frequencies than humans are capable of detecting. For this reason, dog whistles that are inaudible to the human ear can be heard easily by a dog. If a dog whistle has a frequency of 30,000 Hz, what is the wavelength of the sound emitted?

Answer:

because it causes echoes walls are good reflectors of sound

Explanation:

pls mark brainliest ;)

Answer:

When an object applies a force on another object, the second object applies a force of the SAME amount/magnitude on the first object, but the force is in the opposite direction.

Answer:

v = u + at

v = 0 + 9.8 × 3

v = 29.4 m/sec

Answer: 29.4 m/s

Explanation:

We find the answer by using this equation:

v2 = v1 + a * t

Let's figure out what our variables are.

v2 = ?

We don't know the final velocity, so this variable is blank

v1 = 0

In a free fall, the velocity is 0

a = 9.8 m/s

Acceleration in a free-fall is 9.8 m/s

t = 3

It took 3 seconds for the ball to hit the ground

Now we plug our values.

v2 = v1 + a * t

v2 = 0 + 9.8 * 3

v2 = 0 + 29.4

v2 = 29.4

Hope this helps! :)

Answer:

10 average speed seconds

Answer:

A.

Explanation:

It will stay in motion unless for example, someone stops it from going.

Answer:

yes the answer should be a

Answer:

You need to add a picture:)

Answer:

η = 0.0333 = 3.33 %

Explanation:

The efficiency of any device is defined as the ratio of the useful output obtained from that device to the input required by the device. Therefore, the general formula to find the efficiency of any device is given as follows:

[tex]\eta = \frac{O}{I}[/tex]

where,

η = efficiency of hair dryer = ?

O = Useful Output Given by the Hair Dryer = 150 J

I = Input Energy Required by the Hair Dryer = 4500 J

Therefore,

[tex]\eta = \frac{150\ J}{4500\ J}\\[/tex]

η = 0.0333 = 3.33 %

Answer:

The students conclusion is wrong.

Explanation:

The students conclusion is wrong because liquids can not soak into concrete. The water evaporated because it was a hot sunny day. The water turned into a gas called water vapor.

Explanation:

Remember that power is defined as how much Work is done per unit of time.

[tex]P = \frac{dW}{dt}[/tex]

Work is defined as the amount of force applied across a certain distance.  

[tex]W = F*d[/tex]

Since in both cases of climbing the ladder (on Earth and the moon), Luke coveres the same amount of distance in the same amount of time, we are only left with one difference between the two cases - gravity.

If you were to carry your backpack on the moon with the same load of text books, it would take less force to pick it up on the moon. Therefore, Luke expends less effort on the environment with less gravity - the moon.

To find the difference factor - you would want to divid the gravitational contants between earth and the moon.

Answer:

It takes 6.125 times as much work on Earth as it does on the moon.

Explanation:

Formulas

The power formula is

P = Work / Time

Work = Force * distance

Givens

d = 3.0 meters

t = 5.0 seconds

g = 9.8 m/s^2 on earth

g = 1.8 m/s^2 on the moon

Solution

Earth

Work  = F * d

Work = m* a * 3.0 m

Work = m *9.8 * 3.0

Work = m * 29.4

Power = (Work * 29.4)/5

Power = 29.4/5 * m

Power = 5.88 watts.

Moon

You follow the same procedure except you use 1.6 for a.

Work = m * 1.6 * 3

Work = 4.8*m Joules

Power = 4.8 * m/ 5

Power = 0.96 * m Watts

P_earth/Power_moon = 5.88 * m / 0.96 * m = 6.125

Power =

Answer:

Cold Front 3  //  Stationary Front 1  //  Warm Front 2  //  Occluded Front 4

Explanation:

It's simple.  Warm front means the warm air is pressing forward,  which is why it's a warm front.  Stationary Front, meaning they're at a standstill, also makes sense because stationary means not moving.  Then since your last option is Occluded Front, since the others already have an answer, you have no choice but to match 4 with it.  I took the quiz and got the answer right.  :D

Answer:

3' Circle the object that would exert a greater force of gravity on you. ... What is the gravitational force on a 70.0kg object sitting on the earth's surface? 8. What is ... What is the gravitational foroe on a 70.0kg object that is 3.18x106m above the.

:p

3.51 × 10^-7m

Explanation:

Refractive index = wavelength of the light in air ÷ wavelength in the medium

wavelength in the medium = wavelength of the light in air ÷ refractive index

= 5.4 * 10^-7 ÷ 1.54

= 3.51 × 10^-7m