The medium through which a mechanical wave passes can be a solid, liquid, or gas. Properties of a wave change when it moves from one medium to another. What happens to the speed of a wave when it moves
from a gas to a solid?
A It speeds up.
B. It shows down
c. It remains the same
Dit speeds up and then slows down.

Help pls hurry!!!

Answer:

After a male ejaculates, many sperms move to the upper vagina (via contractions from the vagina) through the cervix and across the length of the uterus, reaching the fallopian tubes. Here they will meet the egg cell ready to be fertilized

The Sun is on your meridian, and you have a UT clock that tells you it is 3 PM in Greenwich. Therefore, your longitude is 45° west of Greenwich.

When the Sun is on your meridian, it means you are experiencing solar noon, which occurs when the Sun is at its highest point in the sky. Since your UT clock indicates that it is 3 PM in Greenwich, and each time zone represents 15 degrees of longitude, the time difference between your location and Greenwich is 3 hours. To determine your longitude, you multiply the time difference by 15 degrees, giving you a longitude of 45° west of Greenwich.

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Answer: someone took down my answer I don’t know why when I took this test and got it right but the answer is C like the other person said.

Explanation:

The microwave radiation referred to in this context is radiation that was released as matter formed in the early universe. Therefore option A is correct.

Microwave radiation, also known as cosmic microwave background radiation (CMB), is a faint radiation that permeates throughout the universe.

It is considered to be the remnants of the thermal radiation released shortly after the Big Bang, during a phase called recombination. At this time, the universe transitioned from a hot, dense plasma to a state where neutral atoms could form, allowing photons to travel freely.

The cosmic microwave background radiation is isotropic, meaning it is uniformly distributed in all directions, and it has a characteristic temperature of approximately 2.7 Kelvin (-270.45 degrees Celsius).

It was first detected in 1965 by Arno Penzias and Robert Wilson, who were awarded the Nobel Prize in Physics for their discovery.

The presence of cosmic microwave background radiation provides strong evidence for the Big Bang theory and helps to support the understanding of the early universe's formation and evolution.

It serves as an important tool for studying cosmology and provides insights into the structure, age, and composition of the universe.

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The density of the steam is 250g/m³.

d = M/V

Density is defined as d = m/v, where m stands for mass, and for volume. The unit of density that is most frequently used is grams per cubic centimeter. For instance, the density of Earth is 5.51 grams per cubic centimeter, while the density of water is 1 gram per cubic centimeter.

A material's density is determined by how much space a given amount of the substance occupies relative to its mass (volume). A substance's density is based on the mass, size, and arrangement of its atoms. Density (D) is defined as the substance's mass divided by its volume.

Given,

mass = 500g

volume = 2m³

density = 500/2

density = 250g/m³.

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Answer:

152,155 J

Explanation:

115,333 + 36,822 = 152,155J

Answer:

7945N

Explanation:

Force= Mass× acceleration

F=3500Kg×2.27ms^-2

F=7945 N

Answer:

Sample Response: I disagree with her because many substances show fluorescence under ultraviolet light, not microwaves.

Explanation:

The gravitational acceleration at a distance of 20 km from a black hole with a mass of 10 x \(10^{30}\)  kg is approximately 3.335 x \(10^{-6}\) m/s².

The gravitational acceleration at a distance of 20 km from a black hole with a mass of 10 x \(10^{30}\) kg, we can use Newton's law of universal gravitation. According to this law, the gravitational force between two objects is given by the following equation:

F = G × ((m1 × m2) / r²)

Where F is the gravitational force, G is the gravitational constant (equal to 6.67 × \(10^{-11}\) N*m²/kg²), m1 and m2 are the masses of the two objects, and r is the distance between them.

To find the gravitational acceleration at a distance of 20 km from the black hole, we can rearrange the equation to solve for the acceleration:

a = F / m

= (G × ((m1 × m2) / r²)) / m

= (G × m1) / r²

Plugging in the values for the black hole's mass (m1 = 10 x \(10^{30}\) kg) and distance (r = 20,000 m), we get:

a = (6.67 x \(10^{-11}\) N*m²/kg²) × (10 x \(10^{30}\) kg) / (20,000 m)²

= 3.335 x \(10^{-6}\) m/s²

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Answer:

Explanation:

90

Th

232.04

Box that and there is your answer.

Answer:

Explanation:

90

Th

232.04

Answer:

the answer is at the BOTTOM OF THEIR QUESTION

Explanation:

IT IS CORRECT BTW

The centripetal force on the car with a mass of 1500 kg is 1973.7N.

A centripetal force is a force that makes a body follow a curved path.

To calculate the centripetal force on a car, we use the formula below.

Formula:

Where:

Where:

Substitute these values into equation 1

Hence, the centripetal force on the car is 1973.7N.

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The answer is 553.76m.

\(\begin{aligned}a &=g \sin 5^{\circ}=0.87 \mathrm{~m} / \mathrm{s}^{2} \\s &=u t+\frac{1}{2} a t^{2} \\&=0+\frac{1}{2} \times 0.87 \times(0.6 \times 60)^{2}\end{aligned}\\=553.76m\)

What is acceleration?

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C.) Year

i hope this helped! please mark me as brainliest and 5 stars >:)

Answer:

I believe it's C. Year.

Explanation:

Hope this helps! ^^

If two waves in the same space interfere completely constructively, the amplitude increases.

What is amplitude of a wave?

It is the maximum displacement moved by the wave from its point of equilibrium.

The constructive interference in the two waves occurs when both the waves come together and this results in them being in phase with each other. This means that the oscillation at the given point are in the same direction and due to this the resulting amplitude is larger than the amplitude of the particular wave. Constructive interference can produce a significant increase in the amplitude. For example: if 100 waves of equal amplitude interfere constructively, then the amplitude is 100 times more than the actual amplitude of the wave.

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Answer:

the answer is A

Explanation:

I took the test

Answer:

A

Explanation:

Stellar orbits in elliptical galaxies are random, as opposed to spiral galaxies, where all of the stars orbit the galaxy's core in the same way.

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Answer: 30 degrees

Explanation:

(1) The time does pilot take the weight to hit the ground = 2.4 s

(2) The pilot travel before land = 400 m

Because fall time is proportional to fall height and acceleration due to gravity (g) is constant,

t₁ = t₂  

s₁ = initial distance

s₂ = final distance

t₁ = initial time

t₂ = final time

Hence, the time does it take the weight to hit the ground = 2.4 s

The initial distance (s₁) = 200 m, and the pilot does a run at the same height but twice the speed.

So, the  pilot travel before land:

s₂ = 2 x s₁

= 2 x 200 m

= 400 m

The question is incomplete, it should be:

There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target. A pilot flying low and slow drops a weight; it takes 2.4 s to hit the ground, during which it travels a horizontal distance of 200 m. Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground? How far does it travel before it lands?

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Answer:

the product of mass and velocity

....in my syllabus

A force is changing the motion of the bus.

Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that form unless acted upon by an external force.

The applied force on the bus in the form of brakes acts as the external force on the bus.

According to Newton's first law of motion, the external force (brakes) will change the motion of the bus.

Thus, we can conclude that a force is changing the motion of the bus.

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Answer:

12

Explanation:

A x B = |A||B|sin ©

A x B = 3x4 sin 90

= 12

Answer:

Maharashtra - mashru or himroo / dhoti and lugda

Gujarat - patola / ghagra choli

Punjab - pat / kurta and pajama

Odisha - ikat / Sadi

West Bengal - tossa / kurta

Karnataka - Mysore silk / mundu

Answer:

Iron expands because heating increases the space between the molecules

Explanation:

According to the kinetic molecular theory, all matter is composed of atoms and molecules which are in constant motion.

When a substance is heated, molecules of the substance begin to vibrate faster. This faster vibration leads to increased space between the molecules (expansion) . The kind of motion motion and degree of spacing of the molecules determine the state of matter in which the substance is found.

Hence, when an iron bar is heated, it expands due to increased motion of its molecules leading to spaces between them.

The measurement of 32.3 kJ is equivalent to approximately 7,726.94 calories.

Energy can be measured in different units, such as calories and joules. To convert between these units, we need to know the conversion factor.

One joule (J) is equivalent to 0.239005736 calories (cal). Therefore, to convert kilojoules (kJ) to calories, we need to multiply the value in kilojoules by the conversion factor.

In this case, we have 32.3 kJ. To convert it to calories, we multiply 32.3 by the conversion factor:

32.3 kJ * 0.239005736 cal/J ≈ 7,726.94 calories

Hence, the measurement of 32.3 kJ is approximately equivalent to 7,726.94 calories. It's important to note that the conversion factor used here is an approximate value, and the exact conversion factor may vary slightly depending on the specific definitions and standards used for calories and joules.

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The electron makes 5.76x10^15 revolutions per second.

According to Bohr's atomic model, the energy of an electron in an atom is quantized. The ground state energy of hydrogen is -13.6 eV.

When an electron transitions from a higher energy level to a lower one, it emits energy in the form of a photon. Angular momentum is conserved during the transition, and the energy released corresponds to the difference in energy levels.

Therefore, the angular momentum of the electron changes as a result of the transition. Therefore, the frequency of the photon is proportional to the energy difference, according to the Planck equation: E = hf, where E is the energy difference, h is Planck's constant, and f is the frequency of the photon.

The electron revolves around the nucleus in a circular orbit. As a result, the frequency of the photon is proportional to the frequency of the electron's rotation around the nucleus.

The frequency of an electron's rotation around the nucleus is related to its angular momentum by the equation: f = L/2πmr^2, where m is the electron's mass, r is the radius of the orbit, and L is the angular momentum.

The radius of an electron's orbit is related to the principal quantum number n by the equation: r = n^2a0, where a0 is the Bohr radius. Therefore, the frequency of an electron's rotation around the nucleus is given by the equation: f = n^2(L/2πma0^2).

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Transverse waves called S waves occur during earthquakes.

Answer:

sorry

Explanation:

i don't know this but when i find the answer i will type here

Gamma rays of electromagnetic radiation with a relatively high amount of energy is used to sanitize lab goggles.

A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays.

Moreover, gamma rays are the most harmful external hazard. Beta particles can partially penetrate skin, causing “beta burns”. Alpha particles cannot penetrate intact skin. Gamma and x-rays can pass through a person damaging cells in their path.

Therefore, both x-rays and gamma rays are forms of high-frequency (high-energy) ionizing radiation, which means they have enough energy to remove an electron from (ionize) an atom or molecule. Ionizing radiation can damage the DNA (genes) inside a cell. Sometimes this can lead to cancer later on.

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The value of the acting force between the two coils is approximately 5.65 N.

F = (μ₀/4π) * (2I₁I₂*l)/d

Substituting these values into the method, we get:

F = (4π × \(10^{-7}\) T·m/A) * (230 A30 A*π m)/(0.05 m)

Simplifying the expression, we get:

F ≈ 5.65 N

Force is an agent that can change the state of motion or shape of an object. it is a vector amount that has both value and path. Force can be applied through direct contact or from a distance, such as through gravitational or electromagnetic fields. Pressure is measured in gadgets of newtons (N) inside the international gadget of units (SI). Some common examples of forces include friction, tension, gravity, and electromagnetic forces.

According to Newton's laws of motion, force is directly proportional to the rate of change of momentum of an object. This means that a larger force will cause a greater acceleration of an object, and a smaller force will cause a smaller acceleration. Understanding the concept of force is essential to many areas of physics, including mechanics, thermodynamics, and electromagnetism.

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Answer:

4750000 J

Explanation:

Kinetic Energy= 1/2* mass* velocity²

1/2*950*100²=4750000