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3 years ago

How much force is required to accelerate a 25kg mass at 10m/s2?

Physics

2 answers:

OlgaM077 [116]3 years ago

5 0

Answer:

25-10=15

15/2= 7.5 hope this helps

marin [14]3 years ago

4 0

Answer:

pokemon cards o are the same thing as the first one to

and the soccer match for this season is going well for you and the team is great for you

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You are outdoors when you hear the constant chirp of a still cricket. You start walking toward the cricket and at some point you

givi [52]

Answer:

4) True, the distance was reduced by a de factor 2

Explanation:

To analyze the statements, let's first see how the sound is produced

The cricket makes the sound rubbed its legs, the energy needed to produce it is constant, after the sound is produced it expands in all directions and this wave is subject to the law of energy conservation.

By expanding in all directions we can assume that the energy for the time that is the power of the sound is distributed over a sphere with different radii each time. The perceived intensity is defined as the power per unit area

I = P / A

Where P is the power, A are the areas and I are the intensities heard by the person

Let's clear the power and match, for two different radii (distances)

P = I₁ A₁ = I₂ A₂

The area of a sphere is

A = 4π R₂

I₂ = I₁ A₁ / A₂

I₂ = I₁ 4π R₁² / 4π R₂²

I₂ = I₁ R₁² / R₂²

Let's analyze this last equation for the situation presented if the intensity increases 4 times, substitute

I₂ = 4 I₁

4 I₁ = I₁ R₁² / R₂²

R₂ = R₁ / 2

We see that to increase the intensity 4 times the distance was reduced twice

Now we can analyze the expressions given

2) False, the power is constant, the cricket always does the same job

3) False, the speed of the wave is constant in the air

4) True, the distance was reduced by a de factor 2

3 0

3 years ago

If the magnetic field is held constant at 3.0 T and the loop is pulled out of the region that contains the field in 0.2 s, what

kap26 [50]

Answer:

emf = 15 * Area and if A is given in square meters, the units of the emf will be Volts

Explanation:

Assuming that the area of the loop of current (A) is known, the magnitude of the induced emf can be calculated using Faraday-Lenz's Law:

$emf=|-\frac{\Delta\,\Phi}{\Delta \,t} |=|\frac{A\,B}{\Delta \,t}|=|\frac{A\,(3)}{0.2}|=15\,A$

and if the area (A) is given in square meters, the emf will directly come in units of Volts.

5 0

4 years ago

A 1.0-kg block and a 2.0-kg block are pressed together on a horizontal frictionless surface with a compressed very light spring

egoroff_w [7]

Answer:

4. both blocks will both have the same amount of kinetic energy.

Explanation:

When the blocks are released free from the compression force, the spring exerts equal and opposite force on each block but the block with heavier (double) mass will attain slower ( half ) speed as compared to the lighter block according to the law of inertia. This works in synchronization to energy conservation.

Spring force is given as:

$F=k.\Delta x$

where: $\Delta x=$ length of compression in the spring

<u>We know kinetic energy is given by:</u>

$KE=\frac{1}{2} m.v^2$

Hence the kinetic energy of both the blocks is equal when they are released to move free.

8 0

4 years ago

Who am I???????????????????????????????????

Tems11 [23]

Answer:

a human that walks on earth

Explanation:

3 0

3 years ago

Read 2 more answers

Cuál es el método que utiliza el factor de la gravedad y la difusión de un líquido sobre un sólido para separar las partes de un

Airida [17]

Answer:

chromatography

Explanation:

Chromatography is one of the powerful technique that is used to separate the mixed components of liquid or the gas mixtures.

In this technique the separation of the mixture by passing the mixture in some solution or some suspension through the medium where the components are made to move at some different rates.

The basic idea in this experiment is that the mixture sample is in mobile phase and it is forced either by pumping or by gravity or by capillary action through the stationary phase to separate the mixture.

4 0

3 years ago