Need help guys please

Answer: 294J

Explanation:

[tex]U_g=mg(y_f-y_i)[/tex]

[tex]U_g=(15)(9.8)(2-0)=294J[/tex]

Answer:

294.3 J

Explanation:

U = mgh

U = energy

m = mass

g = gravity

h = height

so

U = 15kg * 9.81 m/s^2 * 2m

294.3 J (joules) [kg *m^2/s^2]

Answer:

Inertia :)

Explanation:

Answer:

to be completely honest I have no idea however I tried calculating it on a calculator and umm...

I think the frequency is...

17,229,452

but ya know I could be totally wrong so if I am sorry

Answer:

2,760watts

Explanation:

Power of the kettle = current * voltage

P = IV

Given

I = 12A

V = 230V

Substitute into the formula

Power of the kettle = 12*230

Power of the kettle = 2,760watts

Answer:

Explanation:

A mixture can usually be separated back into its original components. Some examples of mixtures are a tossed salad, salt water and a mixed bag of M&M's candy.

Gravitational energy

Snow and sleet when they fall to the ground is gravitational force.

"While snow, sleet and freezing rain are familiar precipitation types to most people, one that may be lesser known is graupel, also known as snow pellets. Graupel forms when snowflakes are coated with a layer of ice. Graupel is typically white and opaque. A comparison of sleet and graupel."

"According to Newton's universal law of gravitation, The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them."

Know more about gravitational force here

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Answer:

see that the velocities are the components in a Cartesian system

Explanation:

The horizontal velocity of the projectile is the x-axis component of the initial velocity

          v₀ₓ = v₀ cos 45

vertical speed is

          [tex]v_{oy}[/tex] = v₀ sin 45

therefore we see that the velocities are the components in a Cartesian system

Answer:

industrial revolution

Explanation:

Answer:

acceleration =

[tex]8.33ms {}^{ - 2} [/tex]

Explanation:

we know,

force = mass × acceleration

8.33 m/s² quickly would a 60kg object accelerate if the person applied a 500N force.

Acceleration the rate at which speed and direction of a moving object vary over time. A point or object moving straight ahead is accelerated whenever it accelerates or decelerates. Even if the speed remains constant, motion on the a circle accelerates so because direction is constantly shifting.

An item that is slowing down will always have a negative acceleration if the current direction of motion is constantly selected as positive.

Force = mass × acceleration

500 = 60 × a

a = 500 / 60

a = 50 / 6

a = 8.33 m/s²

To know more about Acceleration visit:

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Answer:

3 × 10^8 meter/second

300000000 meter/second

Answer:

New force = 12 N

Explanation:

The gravitational force between two masses is given by :

[tex]F=\dfrac{Gm_1m_2}{d^2}[/tex]

Where

d is the distance between masses

Initial force, F₁ = 3 B

Initial distance, d₁ = 10 m

Final distance, d₂ = 5 m

According to the above relation,

[tex]\dfrac{F_1}{F_2}=\dfrac{r_2^2}{r_1^2}\\\\F_2=\dfrac{F_1r_1^2}{r_2^2}\\\\F_2=\dfrac{3\times 10^2}{5^2}\\\\F_2=12\ N[/tex]

So, the new force is 12 N.

Answer:

Then she only traveled 1km

Answer:

The frequency of the wave would come out to be 110 Hz.

Frequency is the number of completed wave cycles per second. By using the simplest frequency equation, f = 1 / T, you get the answer I provided above.

Answer:

d

Explanation:

I am smart

Answer:

a. Acceleration = 1.75 m/s²

b. Force = 105 Newton.

Explanation:

Given the following data:

Mass = 60kg

Final velocity = 7m/s

Time = 4 seconds

Required to find the acceleration and force of the body;

a. To find the acceleration;

Mathematically, acceleration is given by the equation;

[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]

Where;

Since the elevator is starting from rest, its initial velocity is equal to 0m/s.

Substituting into the equation, we have;

[tex]Acceleration = \frac{7 - 0}{4}[/tex]

[tex]Acceleration = \frac{7}{4}[/tex]

Acceleration = 1.75 m/s²

b. To find the force;

[tex] Force = mass * acceleration [/tex]

Substituting into the equation, we have;

[tex] Force = 60 * 1.75[/tex]

Force = 105 Newton.

Answer:

Ф = 4.5176x10⁵ N . m² / C

Explanation:

In this case, we need to use two expressions in order to calculate the electric flux of the sphere.

First the Electric flux is calculated using this expression:

Ф = E * A  (1)

Where:

E: Electric field

A: Area of the sphere

To get the electric field E, we use this expression:

E = K * q / r²    (2)

If we replace (2) into (1) we have the following:

Ф = K * q * A / r²    (3)

Finally, we need to know the expression to get the area of a sphere which is the following:

A = 4πr²   (4)

Replacing into (3):}

Ф = K * Q * 4πr² / r²       discarting r²:

Ф = K * Q * 4π   (5)

Now, all we need to do is replace the given values and solve for the electric flux of the sphere:

Ф = 8.98755x10⁹ * 4x10⁻⁶ * 4 * π

Hope this helps

The train has covered 13,500 meters of track.

We don't know its position, because we don't know where it started from, and we don't know how straight the track is.

Answer:

22 s

Explanation:

time = distance / velocity

We know that distance = 770 m and velocity = 35 m/s.

t = d / v

t = 770 m / 35 m/s

t = 22 s

It takes 22 seconds to cover 770 m. Hope this helps, thank you !!

Explanation:

dont know so sorryyyyyyyyy

Answer:

Mass = 27.6 grams

Explanation:

Given the following data;

Density of ice = 0.92g/cm³

Volume = 30cm³

To find mass of ice;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

[tex]Density = \frac{mass}{volume}[/tex]

Making mass the subject of formula, we have;

[tex] Mass = density * volume [/tex]

[tex] Mass = 0.92 * 30 [/tex]

Mass = 27.6 grams

Therefore, the mass of ice is 27.6 grams.

Secant is the answer. Please mark brainliest.

A line that intersects a circle at exactly two points is called a secant line.

hope this helped!

Answer:

the location of the center of gravity for the entire body is 1.08 m

Explanation:

Given the data in the question;

w1 = 458 N, y1 = 1.34 m

w2 = 120 N, y2 = 0.766 m

w3 = 89.8 N, y2 = 0.204 m

The location arrangement of the body part is vertical, locate the overall centre of gravity by simply replacing the horizontal position x by the vertical position y as measured relative to the floor.

so,

[tex]Y_{centre of gravity}[/tex] = (w1y1 + w2y2 + w3y3 ) / ( w1 + w2 + w3 )

so we substitute in our values

[tex]Y_{centre of gravity}[/tex] = (458×1.34 + 120×0.766 + 89.8×0.204 ) / ( 458 + 120 + 89.8 )

[tex]Y_{centre of gravity}[/tex] = 723.9592 / 667.8

[tex]Y_{centre of gravity}[/tex] = 1.08 m

Therefore, the location of the center of gravity for the entire body is 1.08 m

Answer:

5N

Explanation

convert grams to kg and multipy with 10 (.5 *10)=5N

Answer:

The resistance that will provide this potential drop is 388.89 ohms.

Explanation:

Given;

Voltage source, E = 12 V

Voltage rating of the lamp, V = 5 V

Current through the lamp, I = 18 mA

Extra voltage or potential drop, IR =  E- V  

                                                    IR = 12 V - 5 V = 7 V

The resistance that will provide this potential drop (7 V) is calculated as follows:

IR = V

[tex]R = \frac{V}{I} = \frac{7 \ V}{18 \times 10^{-3} A} \ = 388.89 \ ohms[/tex]

Therefore, the resistance that will provide this potential drop is 388.89 ohms.

Answer:

Newton's second law of motion

Answer:

The bar of colors = Chemical composition of stars

All the blue stars, (image 2) = Distance of stars

All the different color stars =Temperature of stars

Explanation:

I did this same exact thing just now and i got it correct.

Answer:

actually ships are made in newtons third law of motion.it states to every action there is equal and opposite reaction. curved is made in downwards to maintain upthrust and to made balance.

actually it prevents ships from drowning and to move with a heavy mass.

Answer:

7/ m5sec per minute ckvhxrsuvj