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Answer:

[tex]\boxed {\boxed {\sf A. \ 36 \ m}}[/tex]

Explanation:

The distance an object travels is the product of its speed and time.

[tex]d=s \times t[/tex]

The object's speed is 12 meters per second and the time is 3 seconds.

Substitute the values into the formula.

[tex]d= 12 \ m/s \times 3 \ s[/tex]

Multiply. Note that the units of seconds will cancel, so we are left with meters as our units.

[tex]d= 12 \ m * 3[/tex]

[tex]d= 36 \ m[/tex]

The object travels a distance of 36 meters and choice A is correct.

Answer:

Initial velocity, u = 23.33 m/s

Explanation:

Given the following data;

Acceleration = 2.5 m/s²

Distance = 4 km to meters = 4000 meters

Time = 0.8 mins to seconds = 0.8 * 60 = 48 seconds.

To find the initial velocity, we would use the second equation of motion;

[tex] S = ut + \frac {1}{2}at^{2}[/tex]

Where;

S represents the displacement or height measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

4000 = u*48 + ½*2.5*48²

4000 = 48u + 1.25*2304

4000 = 48u + 2880

48u = 4000 - 2880

48u = 1120

Initial velocity, u = 1120/48

Initial velocity, u = 23.33 m/s

Answer:

h = 4.04 m

Explanation:

Given that,

Mass of a child, m = 25 kg

The speed of the child at the bottom of the swing is 8.9 m/s

We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

[tex]mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}[/tex]

Put all the values,

[tex]h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m[/tex]

So, the child is able to go at a height of 4.04 m.

Answer:

this frequency is in the near UV range

Explanation:

The accelerated movement of a charge creates an electromagnetic wave, the speed of the wave is the speed of light

         c = λ f

the emitted frequency is f = 10⁶ 10⁹ Hz = 10¹⁵5 hz,

light of this frequency is in the near UV range

Answer:

2 ZnS + 3O2 ---> 2ZnO + 2 SO2

Explanation:

2 ZnS + 2O2 ---> 2ZnO + SO2

There are 2 Zn atom on the LHS and 2 Zn on the RHS. Hence the Zn is balanced on both sides of the equation.

There are two S atom on the LHS but there is only one S atom on the RHS.

Hence we will balance the S atoms

2 ZnS + 2O2 ---> 2ZnO + 2 SO2

Now the oxygen is unbalanced as there are three oxygen molecule on the RHS but only two on the LHS.

Hence, the balanced equation would be

2 ZnS + 3O2 ---> 2ZnO + 2 SO2

Answer:

E = 4000 N/C

Explanation:

Given the following data;

Force = 0.080 N.

Charge, q = 20 microcoulomb = 20 * 10^-6 = 2 * 10^-5 Coulombs

To find the electric field strength;

Mathematically, the electric field strength is given by the formula;

Electric field strength = force/charge

Substituting into the formula, we have;

E = 0.080/0.00002

E = 4000 N/C

In short :

An object is said to be at rest when it doesn't change is position with respect to a stationary object which is taken as its reference point or origin of the object, as the time passes.

Answer:

liquid phase

Explanation:

it is liquid phase because molecules are not that tightly packed as solid and not that far away from each other as in gas phase.

Explanation:

is this the full question?

Answer:

1258.46

Explanation:

Acellus

Answer:

your voice travels much more quickly across your vocal cords, also LOT less density which causes the sound to  travel over twice as fast through helium than it does regular air.

ballon Air = Helium

Hope this helps and brainlist is appreciated !

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Answer:

Answer:

The velocity of the ball when it reaches its highest point is  0

Explanation:

The velocity of the ball when it reaches its highest point is 0

Once the ball is tossed into the air, as it goes up, the initial velocity with which it was thrown, reduces, as the motion of the ball is hindered by several forces such as gravity and air resistance. This slows down the velocity of the ball, up until it reaches a point, where the upwards velocity of the ball becomes zero. at this point, the ball begins to fall back to the ground.

Abiotic variables are particularly essential since they have a direct impact on organisms' ability to live.

Answer: 7.2%

Explanation:

Given

Efficiency of converting energy produced by wind into electricity is about [tex]\eta_1=40\%[/tex]

Transport of electricity efficiency [tex]\eta_2=90\%[/tex]

Fluorescent light bulb efficiency is [tex]\eta_3=20\%[/tex]

Overall efficiency is the product of all the efficiencies i.e.

[tex]\Rightarrow \eta=\eta_1\times \eta_2\times \eta_3\\\\\Rightarrow \eta=0.4\times 0.9\times 0.2\\\Rightarrow \eta=0.072\ \text{or}\ 7.2\%[/tex]

Therefore, the overall efficiency is 7.2%

Answer:

d. wavelength/2.

Explanation:

The circular motion of water molecules extends from regions of shallow water to deep water. It ranges from a depth, H < L/20 for shallow water to a depth of H > L/2 for deep water where L is the wavelength of the wave.

For depths greater than L/2,the circular motion is not affected by the wave energy. So, the maximum depth for the circular motion is L/2 = wavelength/2.

Answer:

They are totally different.

Explanation:

However, sound and radio waves are completely different phenomena. Sound creates pressure variations (waves) in matter, such as air or water, or your eardrum. Conversely, radio waves are electromagnetic waves, like visible light, infrared, ultraviolet, X-rays, and gamma rays

Answer:

That's essentially how objects in orbits work as they move closer to the body they orbit, they accelerate faster and faster. Our penny will get so fast that, once it comes around the planet, it will be flung very far away, which will then slow it down. This is what creates an elliptical orbit.

Explanation:

Answer:

Full and New Moon

Explanation:

Answer:

anashe

Explanation:

full

Answer:

w=fxd

w=3.5x4

w=14

this is the correct answer

Answer:

[tex]a=0.276[/tex]

Explanation:

From the question we are told that:

Mass [tex]m=98.kg[/tex]

Radius [tex]r=0.335[/tex]

Angular velocity [tex]\omega=100rpm[/tex]

Radial force of [tex]F_r=23.6 N.[/tex]

Kinetic coefficient of friction  [tex]\mu=0.192[/tex]

Generally the equation for Kinetic Force is mathematically given by

 [tex]F_k=\mu.F_r[/tex]

 [tex]F_k=0.192*23.6[/tex]

 [tex]F_k=4.5312[/tex]

Generally the equation for Torque on Center is mathematically given by

 [tex]Ia=f_k*r[/tex]

Where

 [tex]I=\frac{Mr^2}{2}[/tex]

Therefore

 [tex]a=\frac{2f_k}{Mr}[/tex]

 [tex]a=\frac{2*4.5312}{98*0.335}[/tex]

 [tex]a=0.276[/tex]

Therefore Angular acceleration of the grindstone is

[tex]a=0.276[/tex]

Answer:

Energy transfer is the movement of energy from one location to another. For example, when electricity moves from a wall plug, through a charger, to a battery. .While energy can be transferred or transformed, the total amount of energy does not change

Answer:

Entonces, velocidad instantánea = | v | = 0,25 m / s

Explanation:

pregunta completa

Por favor, encontrar el archivo adjunto

Solución

La velocidad instantánea está dada por,

v = dx / dt = pendiente de la curva x-t

aquí, del gráfico:

en x = 1 m ---> t = 8 s

en x = 3 m ---> t = 0 s

entonces, dx = 1-3 = -2 m

dt = 8-0 = 8 s

Entonces,

v = -2/8

v = -0,25 m / s

Dado que, pseed es una cantidad escalar.

Entonces, velocidad instantánea = | v | = 0,25 m / s

Answer:

2,340,000 J

Explanation:

Work done can be described as when energy or force is applied to an object to cause displacement

Work done is measured in joules

1 Watt = 1 Joule / second

650 watts = 650 Joules / second

convert 650 joules to seconds by multiplying by 3600

650 x 3600 = 2,340,000 J

Answer:

The correct answer is - do nothing.

Explanation:

If two same or identical objects, in this instance two glass rods, were rubbed together they neither attract nor repel each other as there is no transfer of electrons from one material to the other material as there is no difference in their charges.

Only two different objects are able to transfer electrons from one material to the other material if rubbed together, to produce the conditions for static electricity to be observed. Therefore there would be no charge on the glass rod so there would be no charge to balls to repel or attract.

Explanation:

let the length be Lcm

5−325−L = 10−530−25

L = 23cm

Answer:

The mass density (ρ)

Explanation:

The molar volume (Vm) is the volume that a mole of an element or compound occupies at standard temperature and pressure STP

The molar volume can be found as follows;

[tex]Vm = \dfrac{Mm}{\rho}[/tex]

Where;

Mm = The molar mass

ρ = The mass density

The molar mass (Mm) of an element or a compound is the ratio of the mass of the element or compound to the amount of the element or compound in the given mass

The mass density, ρ, of an element or a compound is the mass of a unit volume of the element or compound

Therefore, we have;

[tex]\rho = \dfrac{Mm}{Vm}[/tex]

When we divide the molar mass (Mm) by the by the molar volume (Vm), we obtain the mass density (ρ).