HELP PLS !!!!!!!!!!!!!

Answer:

Explanation:

The following data

Distance x = 17km = 17000m

Speed v = 340m/s

Using the formula to get the time;

2x = vt

t = 2x/v

t = 2(17000)/340

t = 34000/340

t = 100secs

Hence it takes 100seconds for the sound to reach your ears

Answer:

The object with a higher mass has three times the kinetic energy of the less massive object.

We know that K.E.= 1/2 mv²

mass of first object = 1kg

speed = v

So K.E. = 1/2mv²

= 1/2 × (1) × v²

=

[tex] \: \: \: \: \: \: \: \: \: = \frac{1}{2} {v}^{2} \\ [/tex]

Now the mass of second body = 3kg

speed = v

So K.E. = 1(3)v²/2

=

[tex] \: \: \: \: \: \: \: \: \: = \: \: \frac{3}{2} {v}^{2} \\ [/tex]

now

K.E of first / KE of 2nd

[tex] \frac{1}{2} {v}^{2} \div \frac{3}{2} {v}^{2} \\ [/tex]

[tex]\frac{ \frac{ke \: of \: first \: }{ - - - - - - - - - - -} }{ \frac{ke \: of \: 2nd}{} } = \frac{ \frac{1}{ - -} }{ 3 } \\ \\ so \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \\ 3(ke \: of \: first \:) = ke \: of \: 2nd[/tex]

Answer:

8.5 km/hr

Explanation:

The helicopter is going past the ground at a velocity 8.5 km/hr in north direction relative to ground.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Given that:

Velocity of a helicopter with respect to the clouds is: v= 5 km/hr in north direction.

Velocity of the clouds with respect to the ground: u= 3.5 km/hr  in north direction.

So, Velocity of a helicopter with respect to the ground: V = v + u

= ( 5 +3.5) km/hr in north direction.

= 8.5 km/hr in north direction.

Hence, the helicopter is going past the ground at a velocity 8.5 km/hr in north direction relative to ground.

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Answer:

The magnitude is: [tex]|E|=6084.1\: N/C[/tex]

The direction of E is in the negative x-direction.

Explanation:

The electric field equation is:

[tex]E=k\frac{Q}{r^{2}}[/tex]

Where:

Using the electron charge ([tex]e = -1.6*10^{-19}\: C[/tex])

[tex]E=-9*10^{9}\frac{1.6*10^{-19}}{(486.5*10^{-9})^{2}}[/tex]

The magnitude is:

[tex]|E|=6084.1\: N/C[/tex]

The direction of E is in the negative x-direction.

I hope it helps you!

The magnitude and direction of an electric field is required.

The electric field at the midpoint is [tex]12168.21\ \text{N/m}[/tex] the direction is towards electron.

k = Coulomb constant = [tex]9\times 10^9\ \text{Nm}^2/\text{C}^2[/tex]

q = Charge of particle = [tex]1.6\times 10^{-19}\ \text{C}[/tex]

r = Distance between the electron and proton = 973 nm

The electric field will be

[tex]E=\dfrac{2kq}{\left(\dfrac{1}{2}r\right)^2}\\\Rightarrow E=\dfrac{8kq}{r^2}\\\Rightarrow E=\dfrac{8\times 9\times 10^9\times 1.6\times 10^{-19}}{(973\times 10^{-9})^2}\\\Rightarrow E=12168.21\ \text{N/m}[/tex]

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Answer:

imma try nd help cuz i havent seen anybody answer so

1.sara

2.same for both

3.tom

Explanation:

Answer:

Explanation:

Answer:

a piece of equipment with moving parts that does work when it is given power from electricity, gasoline, etc.

Explanation:

Have A Wonderful Day !!

Answer:

The acceleration of the object is 314.57 m/[tex]s^{2}[/tex].

Explanation:

From Newton's second law of motion,

F = ma

where: F is the force applied on an object, m is the mass of the object and a is the acceleration of the object.

⇒ a = [tex]\frac{F}{m}[/tex]

In the given question, the resultant force, F should be determined.

Total horizontal force, [tex]F_{x}[/tex] = 16 - 126

                                    = -110 N

The horizontal force applied to the object is 110 N to the left.

Vertical force, [tex]F_{y}[/tex] = 4 N.

Resultant force, F = [tex]\sqrt{F_{x} ^{2} + F_{y} ^{2} }[/tex]

                         = [tex]\sqrt{(-110)^{2} + (4)^{2} }[/tex]

                        = [tex]\sqrt{12116}[/tex]

                        = 110.0727

Resultant force, F = 110.1 N

So that,

a = [tex]\frac{110.1}{0.35}[/tex]

  = 314.5714

a = 314.57 m/[tex]s^{2}[/tex]

The acceleration of the object is 314.57 m/[tex]s^{2}[/tex].

Answer:

Static friction

Explanation:

Static friction is the friction force that acts on objects that are not moving.

Answer:

Explanation:

Mass - 3

Height - 1

Gravity - 1

Velocity - 2

Potential Energy: mgh

Kinetic Energy: 1/2mv^2

Answer:

it is called melting or phase transition :)

Explanation:

Answer:

person is accelerating downwards

Explanation:

We are told that the force of the person standing on the elevator is 800 N acting downwards.

We are also told that the upward force of the elevator on the person is 600 Newtons.

This means that Upward force is lesser than downward force and thus the person is accelerating downwards

Answer:

accelerating downward

Explanation:

Took it on test

Answer:

Stalactites

Explanation:

these formations are created by dripping water in a cave that is rich in minerals that develop for hundreds of years. stalagmites are also known for their comedic name "cave bacon" I hope this helped!

A type of dripstone formation where the deposits hang from the ceiling of the cave is called a stalactite. Stalactites are formed when water containing minerals, such as calcium carbonate, drips from the ceiling of a cave. Over time, the water evaporates, leaving behind mineral deposits that build up and form a long, icicle-like structure hanging from the ceiling. Stalactites can vary in size and shape, and they are often found in caves with dripping or seeping water. They can take thousands of years to form, as the mineral-rich water slowly deposits minerals layer by layer.

The force applied in raising the block to the given height is 25 N.

The given parameters:

The force applied in raising the block to the given height is calculated as follows;

[tex]Work \ done= \ F \times d\\\\W = Fd\\\\F = \frac{W}{d} \\\\F = \frac{50 \ J}{2 \ m} \\\\F = 25 \ N[/tex]

Thus, the force applied in raising the block to the given height is 25 N.

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Answer:

zone of saturation

Explanation:

The water table is the upper limit of the zone of saturation. At the zone of saturation, the aquifers are filled with water completely. The void spaces within the rock particles are taken up by fluids.

The upper limit of this zone is the water table.

Above the water table is the zone of aeration where the pore spaces are filled within air.

During the time of recharge especially raining seasons, part of the zone of aeration are filled with water.

Answer:

zone of saturation.

Explanation:

Answer:

A

Explanation:

The element that unicornium-210 (210Ui) could not decay into based on atomic mass alone is 90Sr.

A radioactive isotope is a type of atom that has an unstable nucleus that spontaneously decays or disintegrates, emitting radiation in the form of particles or electromagnetic waves. This process is known as radioactive decay.

The unstable nature of the nucleus arises from having too many or too few neutrons compared to the number of protons in the atom, which affects the stability of the atomic nucleus. The decay of radioactive isotopes can have practical applications in fields such as nuclear medicine, energy production, and environmental monitoring, but can also pose health and safety risks if not handled properly.

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electromagnetic

all electromagnetic waves move at the speed of light.

so yes, light waves are electromagnetic waves :)

i hope this helps!

Answer:

38 kg.m/s

Explanation:

Momentum

Momentum is often defined as "mass in motion".

Since all objects have mass, if it's moving, then it has momentum. The momentum is a vector and It can be calculated as the product of the mass by the velocity of the object:

[tex]\vec p = m\vec v[/tex]

If only magnitudes are considered:

p = mv

We are given that an m=9.5 kg turkey is running at v=4 m/s. Below is the formatted data:

p = ?

m = 9.5 kg

v = 4 m/s

Formula

p = m v

[tex]p = 9.5 \cdot 4[/tex]

p = 38 kg.m/s

The filled table is included below

Answer:

1) The Mechanical Advantage of the lever is 3

2) The velocity ratio of the lever is 4

3) The efficiency of the lever is 75%

Explanation:

A lever is a simple machine that is used to lift a heavy load with a little effort or force

The mechanical advantage is the ratio of the force output to the force input

The given parameters of the lever are;

The length of the lever = 1 m

The weight of the load (force output), [tex]F_r[/tex] = 600 N

The effort applied (force input), [tex]F_e[/tex] = 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

[tex]MA = \dfrac{F_r}{F_e} = \dfrac{600 \ N}{200 \ N} = 3[/tex]

The Mechanical Advantage, MA of the lever = 3

2) The velocity ratio, V.R., is the ratio of the distance moved by the effort, [tex]L_e[/tex], to the distance moved by the load, [tex]L_r[/tex]

For the lever, we have;

The distance of the load from the fulcrum, [tex]L_r[/tex] = 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from the fulcrum, [tex]L_e[/tex] = 1 m - 0.2 m = 0.8 m

From which we have;

[tex]V.R.= \dfrac{L_e}{L_r} = \dfrac{0.8 \ m}{0.2 \ m} = 4[/tex]

The velocity ratio of the lever = 4

3) The efficiency, η, is given as follow;

[tex]\%Efficiency, \, \eta = \dfrac{M.A.}{V.R.} \times 100 = \dfrac{3}{4} \times 100 = 75\%[/tex]

The efficiency of the lever is 0.75 or 75%.

Explanation:

The length of the lever = 1 m

The weight of the load (force output), F_rF

r

= 600 N

The effort applied (force input), F_eF

e

= 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

MA = \dfrac{F_r}{F_e} = \dfrac{600 \ N}{200 \ N} = 3MA=

F

e

F

r

The length of the lever = 1 m

The weight of the load (force output), F_rF

r

= 600 N

The effort applied (force input), F_eF

e

= 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

MA = \dfrac{F_r}{F_e} = \dfra

=

200 N

600 N

=3

The Mechanical Advantage, MA of the lever = 3

2) The velocity ratio, V.R., is the ratio of the distance moved by the effort, L_eL

e

, to the distance moved by the load, L_rL

r

For the lever, we have;

The distance of the load from the fulcrum, L_rL

r

= 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from the fulcrum, L_eL

e

= 1 m - 0.2 m = 0.8 m

From which we have;

V.R.= \dfrac{L_e}{L_r} = \dfra

The distance of the load from the fulcrum, L_rL

r

= 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from t

V.R.= \dfrac{L_e}{L_r} = \dfrac{0.8

L

e

=

0.2 m

0.8 m

=4

The velocity ratio of the lever = 4

3) The efficiency, η, is given as follow;

\%Efficiency, \, \eta = \dfrac{M.A.}{V.R.} \times 100 = \dfrac{3}{4} \times 100 = 75\%%Efficiency,η=

V.R.

M.A.

×100=

4

3

×100=75%

The efficiency of the lever is 0.75 or 75

Answer:

The chemical symbol for sodium carbonate is . The decomposition of sodium carbonate is: The decomposition of sodium bicarbonate, will result in the formation of sodium oxide, and carbon dioxide, . Hence, carbon dioxide, will produce with sodium oxide, on decomposition of

Hope this will help you

Answer: the dorsal cavity

Explanation:

Dorsal body cavity is the body cavity in the human body which is located posteriorly and it comprises of two type of body cavities that are cranial and the spinal. The cranial cavity is formed inside the skull and it protects the vital organ brain inside the bony protection and the spinal cavity houses the spinal cord. Thoracic cavity and pelvic cavity are the ventral cavities that means they are present in the front of the body.

Answer:

the cranial cavity

the vertebral cavity

Explanation:

i got it right

Answer:

If an object pushes out an amount of water equal to its own weight, the upward force acting on it will be equal to gravity - and the object will float.

Explanation:

The buoyant force has an impact on the object in the water and equals the weight of the water displaced by the object. Every object placed in water has some buoyancy force that pushes it against the gravitational force, and this means that any object loses weight in the water.

1200000

80min

4800seconds

The jet aircraft travels 1,200,000 meters, for 80 minutes, and for 4800 seconds.

a. To find the distance traveled in meters, we need to convert 1200 km to meters. There are 1000 meters in one kilometer, so the distance in meters can be calculated as follows:

Distance in meters = 1200 km × 1000 m/km = 1,200,000 meters.

b. To find the total time traveled in minutes, we have to convert 1 hour and 20 minutes to minutes. Since 1 hour is equal to 60 minutes, the total time in minutes is:

Total time in minutes = 1 hour × 60 minutes/hour + 20 minutes = 80 minutes.

c. To find the total time traveled in seconds, we need to convert the total minutes to seconds. There are 60 seconds in one minute, so the total time in seconds is:

Total time in seconds = 80 minutes × 60 seconds/minute = 4800 seconds.

Therefore, the jet aircraft travels 1,200,000 meters, for 80 minutes, and for 4800 seconds.

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Answer:

70.8m

Explanation:

Given parameters:

Time of fall  = 3.8s

Unknown:

Depth of the mine  = ?

Solution:

To solve this problem, we use the appropriate motion equation as shown  below;

            S  = ut + [tex]\frac{1}{2}[/tex] at²  

S is the depth

u is the initial velocity  = 0m/s

t is the time taken

a is the acceleration due to gravity

  Now insert the parameters and solve;

    Since u  = 0;

    S  =    [tex]\frac{1}{2}[/tex] at²    = [tex]\frac{1}{2}[/tex] x 9.8 x 3.8²   = 70.8m

Explanation:

Mass of a lump of gold remains constant where they may be shifted to because mass is depends on the amount of matter within a substance.

At anywhere in the universe, the mass of a body is a constant provided there is no loss in the amount of matter it contains.

Answer:

1. First-quarter moon.

2. New moon.

3. Full moon.

4. 13 degrees.

5. 29 1/2 days.

Explanation:

A moon can be defined as the natural satellite of planet earth that shines as a result of the sun's reflected light, as it revolves around the earth from west to east in 29½ days.

1. First-quarter moon: a visible half-circle.

2. New moon: darkest phase of the moon.

3. Full moon: when the the Earth is between the sun and the moon.

4. 13 degrees: this is a measurement of how far the moon advances each day in orbit.

5. 29 1/2 days: the time the Earth must rotate to return to same position relative to the moon.

Answer:

The frequency of the swing: 1/2 Hertz

The period is: 2 Seconds

Explanation:

The time the kid takes to make a complete to-and-fro swing = 2 seconds

The period, T, is the time it takes to make one complete cycle of an oscillatory motion, therefore, we have;

The frequency, f, is the number of cycles completed each second, therefore, we have;

The time for 1 cycle = 2 seconds

2 seconds = 1 cycle

Dividing both sides by 2 gives;

2/2 seconds = 1/2 cycles

2/2 = 1

In 2/2 = 1 seconds The number of cycles completed = 1/2 cycles

Therefore, the number of cycles completed per (one) second = 1/2 cycles

Therefore the frequency of the swing, f = 1/2 cycle/seconds = 1/2 Hertz

The period, T, is the time it takes to complete one to-and-fro swing which is one cycle which is 2 seconds

Therefore, the period is 2 Seconds.