Which of the following equations accurately defines acceleration?

Plz help ASAP

Answer:

okay

Explanation:

okay

Answer:

Cool

Explanation:

The potential energy of the rock at the top of a 30 meter tall hill is 4414.5 J.

Potential energy is the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring, as a chemical reactant, or by having rest mass).

The formula for potential energy depends on the force acting on the two objects. For the gravitational force, the formula is:

P.E = m × g × h

Where;

According to this question, a rock is at the top of a 30 meter tall hill. If the rock has a mass of 15kg, the potential energy can be calculated thus;

P.E = 15kg × 9.81m/s² × 30m

P.E = 4,414.5J

Therefore, 4,414.5Joules is the potential energy of the rock.

Learn more about potential energy at: https://brainly.com/question/24284560

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Answer:

4620

Explanation:

440.0+10.50

=4620

Answer:

The maximum distance Charles will push down the trampoline ≈ 0.342 m

Explanation:

The given parameters are;

The mass of the trampoline artist, m = 75 kg

The speed with which the trampoline artist lands, v = 9.0 m/s

The value of the spring constant of the trampoline, k = 52,000 N/m

Let x represents the maximum distance Charles will push down the trampoline

Therefore, we have;

Kinetic energy = 1/2·m·v²

The kinetic energy with which the trampoline artist lands  = 1/2 × 75 × 9.0² = 3037.5

The kinetic energy with which the trampoline artist lands  =  3037.5 J

The potential energy stored in a spring = 1/2·k·x² = The kinetic energy with which the trampoline artist lands

∴ 1/2 × 52,000 × x² = 3037.5

∴ x = √(3037.5/(1/2 × 52,000)) ≈ 0.342

The maximum distance Charles will push down the trampoline = x ≈ 0.342 m

Answer:

Increase the power of a hypothesis test

Use a larger sample. ...

Improve your process. ...

Use a higher significance level (also called alpha or α). ...

Choose a larger value for Differences. ...

Use a directional hypothesis (also called the one-tailed hypothesis).

The two main ways of increasing the current in an electrical circuit are by increasing the voltage or by decreasing the resistance.

Answer:

1.6 s

Explanation:

From the question given above, the following data were:

Velocity (v) = 15.68 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

Thus, we can calculate the time taken for Jack to hit the water by using the following formula:

v = gt

15.68 = 9.8 × t

Divide both side by 9.8

t = 15.68 / 9.8

t = 1.6 s

Therefore, it took Jack 1.6 s to hit the water.

Answer:

Ceiling fan

Explanation:

Ceiling fan is a perfect and typical example of electrical energy being converted to mechanical energy.

In most systems, energy is usually transformed from one form to another. Energy is not created neither is it destroyed. We know this by virtue of law of conservation of energy.

Answer:

1. A

2. C

3. A

4. B

Explanation:

A conductor allows electric current to pass through it. Hence, when conductors are connected in a closed circuit, current flows.

All the resistors in Q2 are connected in series. In a series connection, the current across all the resistors is the same.

In a battery, chemical energy is converted to electrical energy by chemical reactions.

When a new resistor is connected in parallel to a circuit the current increases accordingly.

Answer:

B

Explanation:

the external force was applied

Answer:

An acid is defined as a substance whose water solution tastes sour, turns blue litmus red and neutralizes bases. A substance is called base if its aqueous solution tastes bitter, turns red litmus blue or neutralizes acids. Salt is a neutral substance whose aqueous solution does not affect litmus

Answer:

22.5 kg

Explanation:

solve for mass in the kinetic energy equation then round to a whole number

A beaver runs at a speed of 2.0 m/s with 45 J of kinetic energy.

What is the beaver’s mass?

Answer: 22.5 kg

Answer:

D. Arrow 1 is carbon dioxide and arrow 2 is oxygen.

Explanation:

Answer:

Elevate the wound.

Hope this helped!

Answer:

probly c or b

Explanation: experinse

Answer:

decreasing the surface area.

Explanation:

The rate of reaction or the reaction rate may be defined as the speed or the rate at which the reaction occurs. It is the speed of formation of the products from the reactants. The following factors increases the rate of reaction :

1. by adding a  catalyst

2. by increasing the temperature

3. by increasing the pressure

4. by increasing the surface area

5. by increasing concentration

Hence, decreasing the surface area of the reaction reduces the rate of reaction.

Answer:

10m/s

Explanation:

Answer:

2250N

Explanation:

W= mg,

where W= weight

m= mass

g= acceleration due to gravity

Given that the body is 90kg, m= 90kg.

Acceleration due to gravity of planet

= 2.5(10)

= 25 m/s²

Weight of body on planet

= 90(25)

= 2250N

*Mass is the amount of matter an object has and is constant (same on earth and the planet).

Answer:

Here

mass=90kg

time=2.5second

acceleration due to gravity=10m/s

now,,,

Force=???

Force=mass*acceleration

Force=90*10

Force=900N

Answer:

tysm

Explanation:

Answer:

OMG THANK U SO MUCH I NEEDED THEMMMMM

Answer:

For the car to move with constant velocity the additional force required is  [tex]F__{dg} }= -3674 \ N[/tex]

Explanation:

From the question we are told that

  The net force of the car is  [tex]F_{net} = 3674 \ N[/tex]

Generally the total  force acting on the  car is the net force plus the force due to gravity acting in direction of the car (Let denote it as [tex]F__{dg}[/tex])

So the total force acting on the car is mathematically represented as

        [tex]F_{net} + F__{dg}} = F[/tex]

Here this F representing the total force can be mathematically represented as

      [tex]F = ma[/tex]

Now for constant velocity to be attained, the acceleration of the car will be zero  

So  at constant velocity

       [tex]F = m * 0[/tex]

=>    [tex]F = 0 \ N[/tex]

So  

     [tex]F_{net} + F__{dg}} = 0[/tex]

=>   [tex]F__{dg} }= -F_{net}[/tex]

=>   [tex]F__{dg} }= -3674 \ N[/tex]

Answer:

a) El remolque desciende 7.4 cm

b) La carga debe ser de 15715.6 N ó 1603.6 kg

Explanation:

Para los cálculos que involucren muelles, se aplica la Ley de Hooke, la cual relaciona el efecto de una Fuerza y el cambio de longitud que esta ejerce,  en un resorte de elasticidad dada.

Escrito en fórmula:

[tex]F=-k \cdot \Delta L[/tex]

Donde:

F es la fuerza ejercida

k es la constante elástica del muelle

ΔL es la variación de longitud del muelle

El problema indica que al cargar 2100 kg se ejerce una fuerza de 20580 N

Esto se corrobora con la 2da ley de Newton y asumiendo una aceleración de gravedad de 9.8 [tex]\frac{m}{s^{2} }[/tex]

[tex]F_{1} =m \cdot a\\F_{1}=2100kg \cdot 9.8\frac{m}{s^2}\\F_{1}=20580N[/tex]

Esta fuerza comprime o reduce la longitud del muelle en 5.5 cm. Usando estos datos en la Ley de Hooke, podemos obtener la constante elástica k:

[tex]F=-k \cdot \Delta L\\20580N=-k \cdot (-0.055m)\\\\k=\frac{20580N}{0.055m}\\k= 374181\frac{N}{m}[/tex]

Ahora ya tenemos los datos para resolver las preguntas:

Aplicando directamente la formula de la Ley de Hooke:

[tex]F=-k \cdot \Delta L\\\Delta L=\frac{F}{-k} \\\Delta L= \frac{28000N}{-374181\frac{N}{m}} \\\Delta L=-0.074 m = -7.4cm[/tex]

En este caso debemos calcular la fuerza necesaria que haga descender el remolque 4.2cm. Nuevamente utilizando la Ley de Hooke con estos nuevos datos:

[tex]F=-k \cdot \Delta L\\F=-374181\frac{N}{m} \cdot (-0.042m)\\F=15715.6N[/tex]

Si queremos saber la carga en kilogramos:

[tex]F = m \cdot a\\m = \frac{F}{a} \\m = \frac{15715.6N}{9.8\frac{m}{s^2} }\\m= 1603.6 kg[/tex]

Answer:

liquid

Explanation:

F=m*a

350N=m*1.4m/s^2

m=350N/1.4m/s^2=250kg

The answer is C. Rectum.

Answer:

You have a severe case.

Explanation:

My anus smells foul, like poop or diarrhea. Why? Like your anus might be tired of making the same old sensational brown. No fear needed! Anus Maker is here! With this app, you can post poop photos for help if you need! No more foul sensational browns! Start your free Anus Maker trial today!

Answer:

Invasive species alter and degrade the environment, and have a negative effect on both native species and the people who live and work there. The impacts of invasive species include: Reduced biodiversity. Decreased availability and quality of key natural resources.

Explanation:

Hope this helps!

Answer:

Its D

Merry Christmas!!!!

Explanation:

Also I got this question right I had it for an assignment

Answer:

d

Explanation:

Answer:

5.3 m/s

Explanation:

Answer:

Because the energy is waning

Explanation: hope this helps