7. Navy use SONAR method to locate the position of submarine under water. The waves used in SONAR are A transverse waves. B electromagnetic waves. C. audible to human ear. D.audible to navy only.​

Answer:

Density of liquid (ρ)

Depth of liquid (h)

Acceleration due to gravity (g)

Explanation: Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid.

Answer:

depth

height

acceleration due to gravity

Answer: nonstick coating on steel

Explanation:

For harmer:-

Now

[tex]\\ \sf\longmapsto s=ut+\dfrac{1}{2}gt^2[/tex]

[tex]\\ \sf\longmapsto s=0t+\dfrac{1}{2}(10)t^2[/tex]

[tex]\\ \sf\longmapsto s=5t^2\dots(1)[/tex]

For soft drink:-

[tex]\\ \sf\longmapsto 30-s=(24)t+\dfrac{1}{2}(10)t^2[/tex]

[tex]\\ \sf\longmapsto 30-5t^2=24t-5t^2[/tex]

[tex]\\ \sf\longmapsto 24t=30[/tex]

[tex]\\ \sf\longmapsto t=\dfrac{30}{24}[/tex]

[tex]\\ \sf\longmapsto t=1.2s[/tex]

Now

putting t in eq(1)

[tex]\\ \sf\longmapsto s=5t^2=5(1.2)^2=5(1.44)=7.2m[/tex]

Answer:

Explanation:

It transfers from mechanical energy, to electrical energy to chemical energy. The energy transformation in an electromagnet is from chemical to electrical to electromagnetic waves. The north poles of two different magnets will attract each other.

Answer:

definition of force

Explanation:

It states that "the rate of change in momentum is proprtional to the force applied"

[tex]{ \rm{momentum = mass \times velocity}} \\ [/tex]

• from the law stated:

[tex]{ \rm{ \frac{ \delta momentum}{time} = force}} \\ \\ { \rm{ \frac{mv - mu}{time} = force}} \\ \\ { \rm{ \frac{mass(v - u)}{time} = force}} \\ \\ { \rm{mass \times \frac{(v - u)}{time} = force }}[/tex]

• from first newton equation:

[tex]{ \boxed{ \tt{ \frac{v - u}{t} = acceleration}}} \\ [/tex]

• therefore

[tex]{ \rm{mass \times acceleration = force}} \\ \\ { \boxed{ \rm{force = mass \times acceleration}}}[/tex]

Answer:

Good conducters of heat and electricity. High melting points. high density. malleable. Ductile.

Explanation:

Answer:

V = d/t = 20

20=d/4 so d = 80

Answer:566.3

Explanation:

Answer:

KE1 = 1/2 m v1^2

KE2 = 3 KE1 = 3 * 1/2 m v1^2 = 1/2 m v2*2

3 v1^2 =  v2*2

v2 = 3^1/2 v1

Answer:

There are only 38 points.

Explanation:

why are you saying 75?

Answer:

all of these

Explanation:

Answer:

D.all of there

Explanation:

Answer: Convection currents in the molten mantle cause the plates to slowly move about the Earth a few centimeters each year. Many ocean floor features are a result of the interactions that occur at the edges of these plates.

Explanation:

The convection currents can be seen in a crowd, in the ocean, and can also be felt underground.

A convection current simply means the process that has to do with the movement of energy from one particular place to another.

A convention current is also known as convection heat transfer. Convention currents are due to differential heating. This brings about the circulation patterns that are referred to as convection currents that can be found in the atmosphere, water, and the mantle.

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Answer:

The main driver of climate change is the greenhouse effect. Some gases in the Earth's atmosphere

At the equilibrium or balance point the meter stick stationary and the sum of the moments and forces acting on it is zero

Reason:

Known;

Length of the stick = 1 meter

Mass of the stick, m = 0.1 kg

Point the stick will balance when the dough is at one end = 0.33 m

Required:

How much mass does the dough have

Solution:

The meter stick is balanced when the clockwise moment and the anticlockwise moment about the balance point are equal

Let M, represent the mass of the dough, we have;

The center of mass of the meter stick = The 0.5 m point

Taking moment, we have;

Distance from the center of mas of the ruler to the fulcrum, d₁ = (0.5 - 0.33) m

Distance from the dough to the fulcrum, d₂ = 0.33 m

Clockwise moment, [tex]\mathbf{\sum M_{clockwise} }[/tex] = m × d₁

Anticlockwise moment, [tex]\mathbf{\sum M_{anticlockwise} }[/tex] = M × d₂

Therefore;

(0.5 - 0.33) × 0.1 = M × 0.33

Therefore, we get;

The mass the dough has, M = 0.0[tex]\overline{51}[/tex] kg = 51.[tex]\underline{\overline{51}}[/tex] grams

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Answer:

kinetic energy is needed for potential energy since without kinetic energy potential energy would not have the potential energy to do anything

sorry if it doesn't make sense

Explanation:

youre holding a ball in the sky that is potential energy since it has the potential to fall. the kinetic energy is when it falls and lastly the potential is when it hits the floor..

Answer:

5,000+25,000=

Explanation:

It is important to understand the differences between physical and chemical changes. ... It helps to think of physical changes as those involving changes that don't change the make up of the substance, while chemical changes are those that create a new substance. Physical Changes involve energy.

Answer:

Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.

Answer:

definition: the moving of something from its place or position.

Explanation:

though moving around a track they will always end in the same place therefore there is no displacement from the beginning position

There is no displacement from the starting position because they will always wind up in the same place as they started.

Displacement is defined as the overall alteration of an object's location and motion direction. Displacement is recognized as a vector quantity since it takes into account both the direction of the motion and the magnitude of the changing position. Displacement may be zero, positive, or negative.

The initial and final positions are needed in order to calculate displacement because displacement does not provide comprehensive information on the full path length.

The displacement is the shortest distance from the starting point to the finish point, the athlete starts from the start line and reaches the finish line after running through the whole track, but the starting point and the finishing point are the same, so the displacement is zero.

Therefore, the displacement of the athlete running through the track is zero for a complete race.

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Answer:

25 m/s²

Explanation:

F = m × a

50 N = 2 kg × a

a = 50 N : 2 kg

a = 25 N/kg

a = 25 m/s²

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Answer:

2.9 ok ezzzzzzzzzzzzzzzzzzzzzzz

The average velocity of the car traveling south and later returned to the starting point is 0.

Average velocity is defined as the change in displacement per change in the time of motion.

Average velocity is calculated as follows;

[tex]v = \frac{\Delta x}{\Delta t} = \frac{x_2 - x_1}{t}[/tex]

Let the initial displacement of the car, x₁ = 20 m

Let the final displacement of the car, x₂ = 20 m (since the car returned to the starting point).

The average velocity is calculated as;

[tex]v = \frac{x_2 - x_1}{t} = \frac{20 - 20}{5} = 0[/tex]

Thus, the average velocity of the car traveling south and later returned to the starting point is 0.

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Answer:

A.

Explanation:

Drinking water usually helps with gaining hydration cause usually when you get sick you get weak. thats what u think though

Water will help expel toxins from the body that's why it is recommended to sick people to consume more water. Therefore, option (A) is correct.

Proper hydration can be helpful to the skin and mucous cell membranes play a barrier to stop bacteria from entering the body when sick with a virus. Fluid can also help decrease irritation when sneezing, coughing, and even breathing.

Water can help to regulate body temperature, maintain healthy skin and joints, digest food, and help the brain function at its best. Producing requires bodily fluids, like tears and saliva, and removing waste through sweat, and urination.

Dehydration can happen when we lose a high amount of bodily fluids than we’re consuming. This can occur through bodily functions that bring the loss of fluids and electrolytes.

Therefore, it is important to stay hydrated when you are sick.

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Answer:

The first statement appears most accurate.

The last statement also appears accurate, but it does not preclude any contradictory evidence.

The following statements accurately describe a scientific law: There is no contradictory evidence in the current body of knowledge. It is a statement that is true in many, but not all, cases. It is an observation that has been made many times.

The other statements do not accurately describe a scientific law:

"It is an educated guess about how a process occurs" describes a scientific hypothesis or theory, not a law.

"Can be updated or rejected if any contradictory evidence is found" describes the nature of scientific theories, which can be revised or discarded based on new evidence, but laws tend to remain consistent.

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Answer:

meridians

     Imaginary lines called meridians that measure distances East and West of the Prime Meridian. Longitude is different from latitude. Longitude may also be referred to as meridians. Although they measure the distance from East and West, the lines run in the direction of north and south.

Explanation:

hope this helps you if it does please mark brainiest

Explanation:

TRUE - Two colliding objects will exert equal forces upon each other. If the objects have different masses, then these equal forces will produce different accelerations. ... FALSE - In any collision, the colliding objects exert equal and opposite forces upon each other as the result of the collision interaction.