17. two identical waves undergo pure constructive interference. is the resultant intensity twice that of the individual waves? explain your answer.

Answer:

Explanation:

Mass ( m) = 57 gram

density (d)= 8.4 g/cm^3

volume (v)=?

we know density is mass per unit volume

d = m/v

or v = m/d

v = 57/ 8.4

volume = 6.79 cm^3

hOPe it will help :)

Answer:

A. wind blows from the land toward the sea.

B. that this happens because the land cools faster than the sea, and, as a result, the air over land cools faster, which creates an area of higher pressure on land and lower pressure over the sea.

Explanation:

bc I am smrt

PLZ thank five star

and brainliest would be appreciated:-)

Answer:

insulation

Explanation:

they use fur to trap a layer of heat next to its skin and reduce heat transfer

think of it like a house, a closed environment/system and it traps warmth inside and it cant get out. or like a microwave, when you open it you can feel the heat releasing.

When a refrigerant is compressed and condensed, it condenses back into a liquid, giving up heat to the outside air (option A)

Condensation is the process by which a gas or vapor transitions into a liquid. This occurs when the temperature of the gas or vapor is cooled to the point where its molecules lose energy and move closer together, allowing them to bond and form a liquid.

For example, when water vapor in the air is cooled, it can condense into liquid water droplets on a cold surface such as a window or a cold drink. Similarly, when a refrigerant gas is compressed and cooled in a condenser, it can condense into a liquid state.

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The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.

According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.

Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.

Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.

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Let's look at relationship

\(\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{m}{k}}\)

\(\\ \rm\rightarrowtail T\propto \sqrt{m}\)

Hence

\(\\ \rm\rightarrowtail \dfrac{T_1}{T_2}=\sqrt{\dfrac{m1}{m2}}\)

\(\\ \rm\rightarrowtail \dfrac{1.5}{2}=\sqrt{\dfrac{0.5}{m2}}\)

\(\\ \rm\rightarrowtail 0.75^2=\dfrac{0.5}{m2}\)

\(\\ \rm\rightarrowtail m_2=\dfrac{0.5}{0.75^2}\)

\(\\ \rm\rightarrowtail m_2=0.889\)

Hence

Answer

Mass needs to added =0.889-0.500=0.389kg

Explanation:

The downtown is 5 miles far away, if the car travels at 10 miles / hour for 0.5 hours.

v = d / t

v = Velocity

d = Distance

t = Time

v = 10 mi / hr

t = 0.5 hr

d = v * t

d = 10 * 0.5

d = 5 mi

Velocity of the car is the rate of change of position of the car. In simple words it can be said as velocity is used to calculate the distance covered in a given amount of time.

Therefore, the downtown is 5 miles far.

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Answer:

it's b I guess not sure

Explanation:

The reading of the balance for a body with mass 3kg and volume 4 × 10⁻⁴ in air and when fully immersed in water are 29.4N and 25.5N, respectively.

The weight of an object is the force which is acting on the object due to the influence of gravity. Weight is a vector quantity because it has both the magnitude and direction. The gravitational force acts on the object.

The reading of the balance when the body is in air, W = mg = (3) × (9.8) = 29.4 N

The reading of the balance when the body is fully immersed in water is:

F = mg − ρgV = (3) × (9.8) − (1000) × (9.8) × (0.0004) = 25.5 N

Therefore, the reading of the balance in the given conditions are 29.4N and 25.5N.

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Taking into account the Universal Law of Gravitation, the force of attraction between the tow objects is 8 N.

The Universal Law of Gravitation establishes that bodies, by the simple fact of having mass, experience a force of attraction towards other bodies with mass, called gravitational force.

The Universal Law of Gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them.

Mathematically it is expressed as follows:

\(F=G\frac{Mm}{d^{2} }\)

where:

In this case, two objects attract each other with a gravitational force of 32 newtons. The distance between the two objects is doubled.

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.

Then, if the separation distance between two objects is doubled (increased by a factor of 2), then the force of gravitational attraction is decreased by a factor of 4 (d²= 2²= 4). The new force is then \(\frac{1}{4}\) of the original:

F=\(\frac{1}{4}\)×Foriginal

F=\(\frac{1}{4}\)×32 N

F= 8 N

Finally, the force of attraction between the tow objects is 8 N.

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Answer:

The light is absorbed

Explanation:

Taking into account the Boyle's law, the original pressure of a gas was 2.5 atmospheres and the original volume was 578 mL.

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. This is because when the volume decreases, the distance that the particles have to travel is less and therefore more shocks occur in each unit of time, that is, the pressure increases.

Mathematically, if the amount of gas and the temperature remain constant, the product of the pressure and the volume always has the same value:

P×V= k

where:

Being an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

Replacing in Boyle's law:

2.5 atm ×V₁= 1.7 atm ×850 mL

Solving:

V₁= (1.7 atm ×850 mL)÷ 2.5 atm

V₁= 578 mL

The original volume was 578 mL.

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Answer:

A pair of oxygen atoms is a molecule of oxygen. A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms.

Explanation:

The bullet takes 0.0025 seconds to pass through the wooden plank of 5 cm thickness when it is traveling horizontally with an initial speed of 30 m/s and a final speed of 10 m/s.

The time taken by the bullet to pass through the wooden plank can be determined using the equation of motion for constant acceleration.

Given:
Initial speed (u) = 30 m/s

Final speed (v) = 10 m/s

Distance (s) = 5 cm = 0.05 m

To find the time taken (t), we need to calculate the acceleration (a) first. We can use the equation:

v² = u² + 2as

Rearranging the equation, we have:

a = (v² - u²) / (2s)

Substituting the given values:

a = (10² - 30²) / (2 * 0.05)

Simplifying the expression:

a = (-800) / (0.1)

a = -8000 m/s²

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity.

Next, we can use the equation of motion:

v = u + at

Substituting the values:

10 = 30 + (-8000) * t

Simplifying the equation:

-8000t = -20

Dividing by -8000:

t = 20 / 8000
t = 0.0025 s

Therefore, the time taken by the bullet to pass through the wooden plank of 5 cm thickness is 0.0025 seconds.


To find the time taken by the bullet to pass through the wooden plank, we need to calculate the acceleration first using the equation of motion.

By rearranging the equation and substituting the given values, we can find the acceleration.

Then, using the equation of motion again, we can solve for time.

The negative sign in the acceleration indicates that it is in the opposite direction of the initial velocity.

The resulting time is 0.0025 seconds.

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Explanation:

answer is the 3rd law of motion

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The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

Answer:

1 g/cm³

Explanation:

1 kg = 1000 g

1 cm = 0.01 of a meter

1 m³ = 100 cm * 100 cm * 100 cm = 1,000,000 cm

1,000 kg / 1 * 1000 g / 1 kg

^ divided by 1,000,000 cm

1,000,000 divided by 1,000,000 = 1 g/cm³

The four interactions of electromagnetism are:

1. Electric Field Interaction: The electric field is created by electric charges and exerts a force on other charged particles.

2. Magnetic Field Interaction: The magnetic field is generated by moving electric charges or currents and exerts a force on other moving charges or magnetic materials.

3. Electromagnetic Induction: Electromagnetic induction occurs when a changing magnetic field induces an electric current in a conductor.

4. Electromagnetic Waves: Electromagnetic waves are a form of energy propagation that results from oscillating electric and magnetic fields.

The theory of electromagnetism describes the fundamental interactions of electromagnetism, which are based on the principles of electricity and magnetism. These interactions are explained by Maxwell's equations and the electromagnetic field theory. The four interactions of electromagnetism are:

1. Electric Field Interaction: The electric field is created by electric charges and exerts a force on other charged particles. According to Coulomb's law, like charges repel each other, while opposite charges attract. Electric field interactions play a crucial role in understanding the behavior of charged particles and electrically charged objects.

2. Magnetic Field Interaction: The magnetic field is generated by moving electric charges or currents and exerts a force on other moving charges or magnetic materials. According to the laws of magnetism, like poles repel each other, while opposite poles attract. Magnetic field interactions are responsible for various phenomena, including the behavior of magnets, electromagnetic induction, and the operation of electric motors and generators.

3. Electromagnetic Induction: Electromagnetic induction occurs when a changing magnetic field induces an electric current in a conductor. This phenomenon is described by Faraday's law of electromagnetic induction and is the basis for generating electricity in power plants and the operation of transformers.

4. Electromagnetic Waves: Electromagnetic waves are a form of energy propagation that results from oscillating electric and magnetic fields. These waves include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Electromagnetic waves can travel through a vacuum and have various applications, including communication, imaging, and energy transmission.

These four interactions of electromagnetism are interconnected and form the foundation of numerous technological advancements and our understanding of the natural world. They have been extensively studied and tested, leading to the development of theories and applications in various fields such as electronics, telecommunications, energy, and medical imaging.

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Answer:

50m/s.

Explanation:

Let's take acceleration as A and speed as S:

A = 5m/s²

S = A × 10s = 5 × 10 = 50m/s

The answer is 50m/s.

Answer:

50m/s

Explanation:

Given:

a=5m/s^2

t=10s

Required:

v=?

Formula:

a=v/t

Solution:

a=v/t

v=a*t

v=5m/s^2*10s

v=50m/s

Hope this helps ;)❤❤❤

Out of 150 approved mortgage applications, a random sample may have variable or interest-only mortgages.

we are given that a random sample of 150 approved mortgage applications is either variable or interest-only mortgages. A variable mortgage, also known as an adjustable-rate mortgage (ARM), is a type of mortgage in which the interest rate fluctuates based on market conditions. An interest-only mortgage is a type of mortgage in which the borrower only pays interest on the loan for a certain period of time before beginning to make principal payments.To determine what percentage of the sample is variable or interest-only mortgages, we would need more information on the breakdown of the sample. However, we know that these are two different types of mortgages that borrowers can choose from when applying for a mortgage.

A home loan application is a report submitted to a bank when you apply for a home loan to buy land. The application is extensive and includes information about the borrower's employment history, financial situation, and the property being considered for purchase, among other things.

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Answer:

a) cos30=adj/hyp

cos30= horizontal force/10

horizontal force= 8.66 N

rest of a is in the picture.

b) i believe you can continue.

Answer:

vegetables food, sport sport sport

Explanation:

????!!!!

A nucleus whose total mass is less than the sum of the masses of its individual particles.

What is a nucleus?

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Answer:

Oxygen in a container can be made to be at a high pressure through a process called compression. In this process, the oxygen is forced into a smaller volume, which increases the pressure. This can be done using a compressor, which is a machine that uses a piston or other device to compress the oxygen. The compressed oxygen is then stored in a container, such as a cylinder, at high pressure until it is ready to be used. It is important to handle compressed oxygen with care, as it can be dangerous if not handled properly.

Answer:

B and C

Explanation:

Energy is simply defined as the capacity to do work and according to the law of conservation of energy (first law of thermodynamics), energy can neither be created nor destroyed but can, however, be converted from one form to another.

An object can have more than one form of energy at a time. For example, a moving object possesses kinetic energy and can also possess heat energy due to the heat generated while overcoming frictional force.

Option A negates the law of conservation of energy while option D is grossly incorrect.

The correct options are B and C.

Answer:

They have lighting rods to light up the sky so a plane can see the light and not crash into the building

parallel processing perceiving the color, motion, and form of a bird in flight illustrates.

Option a is correct.

According to the trichromatic theory, our ability to perceive red, green, and blue hues as well as how they affect our cerebral activity are both explained by cones (Like a projection T.V.). Consequently, the precise colour we see is determined by the proportion of each colour to the others.

The three kinds of cone receptors that are responsible for colour vision are the foundation of the trichromatic hypothesis of colour vision. Beginning in the 18th century, this hypothesis has a very long history.

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I'm guessing 6.

the coefficient of two turns our hydrogen into 4 and our oxygen into 2 which makes a total of 6 molecules.

Answer:

10 m/s

Explanation:

Find the displacement.

xf - xi = d

0 - (-10) = 10 m

Find the acceleration.

d = 1/2at^2

10 = 1/2a(2)^2

10 = 1/2a(4)

10 = 2a

a = 5 m/s^2

Find the velocity.

v = at

v = 5(2)

v = 10 m/s