11. In order to qualify as a crystalline solid, it is not enough that the atoms or atomic groups be arranged in a regular orderly array. That regular orderly array has to be
(a) in the shape of a regular geometric solid
(b) in a repeating pattern
(c) along a well-defined axis
(d) symmetrical

When you blow across the top of an open tube or pluck a tightly bound string, the lowest frequency produced is the fundamental (1st harmonic). The wavelength of the wave produced is _twice_ the length of the tube or string.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
1. When you blow across an open tube or pluck a tightly bound string, a standing wave is created.
2. The fundamental frequency (1st harmonic) is the lowest frequency that can be produced by the system.
3. For an open tube or a tightly bound string, the fundamental frequency has a wavelength that is twice the length of the tube or string.
4. This occurs because the wave must travel down the tube/string and then reflect back, creating a complete wavelength that is double the original length.

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Answer:

C. answer pa brailest need lang po please

D. Resource Supply this would be directly affected first then the rest would follow after a period of time.

Explanation:

C. Both energy and matter

Answer:

Hence from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very crucial which includes the intermolecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.

Explanation:

Answer:

The speed is 1.35 m/s

Explanation:

(m1+m2) vi= m1+m2v2

(50+1.5) (3.5)=50 (5+v2) +1.5 v2

180.25= 250+ 51.5 v2

180.25- 250+ 51.5 v2

-69.75= 51.5 v2

v2= -1.35 m

From the calculation, the acceleration of the body is 26m/s^2.

When an object is thrown up or down, the motion of the body is influenced by the gravitational pull on the body.

Now;

Given that;

v = 39 m/s

t = 1.5 s

u = 0 m/s

a = ?

v = u + at

v = at

a = v/t

a = 39 m/s/1.5 s

a = 26m/s^2

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This question involves the concepts of the law of conservation of energy and kinetic energy.

The girl's fastest speed is "3.7 m/s".

According to the law of conservation of energy, the girl will have the fastest speed at mean position, which will be calculated as follows:

Loss in Potential Energy = Gain in Kinetic Energy

\(mg\Delta h=\frac{1}{2}mv^2\\\\v=\sqrt{2g\Delta h}\)

where,

v = maximum speed = ?

g = acceleration due to gravity = 9.81 m/s²

Δh = change in height = 1.3 m - 0.6 m = 0.7 m

Therefore,

\(v=\sqrt{2(9.81\ m/s^2)(0.7\ m)}\)

v = 3.7 m/s

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The accurate statement about light is: a) When light strikes a surface at Brewster's angle, only the reflected light is 100% polarized.

Your question is about which statement about light is accurate, including the terms "accurate", "light", and "Brewster's angle". The correct answer is:

a) When light strikes a surface at Brewster's angle, only the reflected light is 100% polarized.
Brewster's angle is the angle of incidence at which light, when striking a surface, is completely polarized in the reflected light. At this angle, the reflected light is polarized perpendicular to the plane of incidence, while the transmitted light is not polarized. This is because, at Brewster's angle, the reflected light is polarized parallel to the surface, while the transmitted light is not completely polarized.

Therefore, option a) correctly states that only the reflected light is 100% polarized at Brewster's angle.

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Answer:

0

Explanation:

she runs 2 whole laps around a 400 meter track, but she is always ending up back where she started, therefor there is no displacement.

Answer:

Three states of matter exist—solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume,

Explanation:

According to the information, the table is completed as follows: Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).

To fill the table to describe the characteristics of the states of matter we have to look for additional information of each state of matter and then complete the table. According to the information we can infer that the correct way to complete the table is:

Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).

Vapor | No | No | Yes

Water | No | Yes | No

Ice | Yes | Yes | No

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Your perceived weight is equal to the normal force. Therefore, when the elevator accelerates upward or downward, you truly feel a little heavier than usual and a little lighter than usual.

(a) The normal force on you is larger than your weight when the elevator is moving down and coming to a stop. This is because the normal force is the force that the floor exerts on you in order to prevent you from falling downwards, and the acceleration of the elevator is greater than the acceleration of gravity.

(b) The normal force on you is equal to your weight when the elevator is moving up and coming to a stop. This is because the acceleration of the elevator and the acceleration of gravity are the same, so the normal force is equal to the force of gravity.

(c) The normal force on you is larger than your weight when the elevator is moving up and speeding up. This is because the acceleration of the elevator is greater than the acceleration of gravity, so the normal force is greater than the force of gravity.

(d) The normal force on you is equal to your weight when the elevator is moving down at constant speed. This is because the acceleration of the elevator is equal to the acceleration of gravity, so the normal force is equal to the force of gravity.

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The work W required to lift an object varies jointly with the object's mass m and the height h that the object is lifted. The work required to lift a 120-kilogram object 1.8 meters is 2116.8 joules is 1,372J.

In physics, the term "work" refers to the measurement of energy transfer that takes place when an item is moved over a distance by an external force, at least a portion of which is applied in the direction of the displacement.

Work done can be computed using the formula:

\(w=Fd\)

Where:

W = work (J)

F = Force (N)

d = Distance (d)

Looking at the given, you know that you do not have a value for force, so you will have to solve for it. 

\(F=Ma\)

Where:

F = Force

m = mass

a = acceleration

Because the object is being lifted, the acceleration will rely on gravity. Acceleration due to gravity is a constant 9.8 m/s^2. Let's list our given first:

F = ?

m = 100kg

a = 9.8m/s^2

Put that into our equation and solve:

\(F=mA\\F=100*9.8\\F=980Kg.m/s^{2}\)

Our force is then 980 N. 

Now that we have force we can solve for Work. The given for work is as follows:

F= 980N

d = 1.4mPut that into our formula and solve:

\(W=Fd\)

\(W=(980)*(1.4)\\W=1372\)

The work done is 1,372J.

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Answer:

the force would increase 4 times more

Explanation

more force results more mass or acceleration

Answer:

it would grow by 4x

Explanation:

The gravitational acceleration experienced by the spacecraft would be  13.33 m/s^2.

The maximum velocity the spacecraft can reach would be 1633.5 m/s.

The kinetic energy of the spacecraft would be KE = 1/2mv^2

The gravitational acceleration experienced by the spacecraft as it falls toward the planet's surface can be calculated using the formula

Thus:

g = (6.67 x 10^-11 N m^2/kg^2) * (4/3 * pi * (5000 km)^3 * 5500 kg/m^3) / (10000 km)^2 = 13.33 m/s^2.

The maximum velocity that the spacecraft can reach just before impacting the planet's surface can be calculated using the formula

The height from which the spacecraft falls is equal to the distance from the planet's surface to the spacecraft's initial position, which is 10,000 km - 5000 km = 5000 km.

Thus, v = sqrt(2 * 13.33 m/s^2 * 5,000,000 m) = 1633.5 m/s.

The kinetic energy of the spacecraft just before impacting the planet's surface can be calculated using the formula

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Answer:

potentiometer is a device used to measure potential difference across the circuit

Betelgeuse is the 10th brightest star in the night sky comparing to other stars. And it is the second brightest in Orion's constellation.

Betelgeuse is the tenth brightest star in the night sky and, after Rigel, the second brightest in Orion's constellation. it is a distinctly reddish semiregular variable star with the widest apparent magnitude range of any first-magnitude star, ranging from +0.0 to +1.6. Betelgeuse is the brightest star in the night sky at near - infrared wavelengths. Its Bayer name is Orionis, which is Latinized to alpha Orionis and abbreviated alpha Ori or Ori

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The bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 degrees Celsius, will be larger than 1.0 cm.

When a scuba diver exhales a bubble underwater, the bubble undergoes changes in size due to the variation in pressure and temperature between the depths and the surface. As the bubble rises towards the surface, the surrounding water pressure decreases, causing the bubble to expand. Additionally, the temperature of the water also affects the bubble's size.

In this scenario, the initial diameter of the bubble is given as 1.0 cm at a depth of 50 meters in a freshwater lake with a temperature of 10 degrees Celsius. As the bubble ascends towards the surface, the water temperature increases to 20 degrees Celsius. According to the ideal gas law, the volume of a gas is inversely proportional to the product of pressure and temperature. As the temperature increases, the volume of the gas also increases.

Therefore, as the bubble reaches the surface where the water temperature is higher, the bubble's diameter will be larger than the initial 1.0 cm diameter. The exact increase in diameter can be calculated using the ideal gas law and considering the change in temperature and pressure throughout the ascent.

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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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The slope of the graph of the equation at the point (20, 2) is 1/8.

To find the slope of the graph of the equation at the given point (20, 2), we need to find the derivative of the equation with respect to x and evaluate it at x = 20. Let's differentiate the equation implicitly:

xy - 9y^2 = 4

To differentiate implicitly, we treat y as a function of x and apply the chain rule. Differentiating both sides of the equation with respect to x:

1 * y + x * dy/dx - 9 * 2y * dy/dx = 0

Simplifying this equation:

y + x * dy/dx - 18y * dy/dx = 0

Grouping the terms with dy/dx:

dy/dx * (x - 18y) = -y

Now, let's solve for dy/dx by dividing both sides by (x - 18y):

dy/dx = -y / (x - 18y)

Substituting the given point (20, 2) into the equation:

dy/dx = -2 / (20 - 18(2))

         = -2 / (20 - 36)

         = -2 / (-16)

         = 1/8

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The magnitude of acceleration, given velocity and time, is 15 m/s².

The formula for acceleration is given as

acceleration = (velocity_f - velocity_i) / time.

if we are given the velocity and time of an object,

we can easily calculate the magnitude of acceleration by using the formula above.

Here's how:

Step 1:

Find the change in velocity. The difference between the final velocity and the initial velocity is the change in velocity. For instance, if an object starts at a velocity of 50 m/s and ends at a velocity of 200 m/s, the change in velocity is 200 m/s - 50 m/s = 150 m/s.

Step 2:

Find the time taken. The time taken is simply the duration of the acceleration. If an object accelerates for 10 seconds, then the time taken is 10 seconds.

Step 3:

Calculate the acceleration. We can now substitute the values of the change in velocity and time into the formula for acceleration. So,

acceleration = (150 m/s) / (10 s) = 15 m/s² (to two significant figures).

Therefore, the magnitude of acceleration, given velocity and time, is 15 m/s².

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Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane

Answer:

C

Explanation:

The answer is straight line motion

Answer:

C

Explanation:

straight line motion. Its the same as the linear motion.

The weight will be 80N.

Given :- Weak Gravitational field of moon relative to earth ,

F=1.6N

To find : Weight of a 50Kg mass on Moon .

Principle - Weight and mass although sounding same has different roles in Physics . Mass is the amount of matter that is utilized to build a material while talking about weight means its inclusive of an exertion of earth with the application of mass. Mathematically weight w= mg [Product of mass and gravity ]

Now in this question using basic unitary method we can resolve the ask of question. For example cost of one pen is 2rupee then cost of 2 pens is 4 rupees.

Reasoning- As per question , weight of 1 kg = 1.6N

so weight of 50Kg= 1.6 x 50⇒80N

Hence the amount of 80N equivalent weight is computed.

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Answer:

current?

Explanation:

Answer:

when you are paddling the push carry on when you paddle the hard put on the push.

Answer:

Because of inertia

Explanation:

As stated in Newton first law "An object at rest will stay at rest, an object in motion will stay in motion unless it is acted upon by a force."

For an example:

If you have a drink without a lid in a car and a car suddently the car stop, u will automatically try to catch the drink preventing it from spilling. This is because that the drink that was in motion with the car want to stay in motion, but when the car stop, the drink still wanna be in motion, that's why it will be flying off and spill if u don't catch it.

Back to the question:

if a bicyccle is in motion, it will wants to be in motion untill a force act upon it, let's say a bump or fricition.

hope this help. give me the brainliest if u can.

Answer:

A

Explanation:

Chemical is a reaction between 2 things signs of that would be a new color, a new substance formed, or any sign of bubbles/smoke etc. while physical changes are done on purpose such as ripping a paper or cutting a log in half! hope that helped

Answer:

Given that the train which is heading north on the tracks takes 6 seconds to reach 60 miles per hour and completes the entire 60 mile trip in one hour, we can calculate the train's average speed and velocity over the one hour trip. Now right off the bat we know that the measurement we calculate for the train's average SPEED will be a scalar quantity as we are dealing with speed. On the other hand the measurement we calculate for the train's velocity will be a vector quantity as we are dealing with velocity and the quantity has both a magnitude and a direction. Now: we now that the train completed the entire 60 mile trip in one hour which means it is going 60 mph north, which is the velocity This velocity has both a magnitude (60 mph) and a direction (north). For the train's average speed we look at distance divided by time. The speed of the train is 60 miles per hour. The difference between speed and velocity is that speed is how fast an object is going with respect to a frame of reference versus velocity is a measure of the speed and direction of an object.

The layer of the sun involved in producing lights of different colorations is the corona.

The dancing streams of colored light observed is known as Aurora Borealis or Northern Lights. It is a natural light display in the Earth's atmosphere that occurs when charged particles from the sun's solar wind collide with atoms and molecules in the Earth's upper atmosphere.

The layer of the sun that is involved in producing the charged particles that cause the Northern Lights is the corona, which is the outermost layer of the sun's atmosphere. The corona is composed of extremely hot plasma with temperatures ranging from 1 to 3 million Kelvin.

When the sun is active, it releases coronal mass ejections that send charged particles hurtling toward Earth. When these particles collide with the Earth's atmosphere, they produce the beautiful and ethereal light show that is the Aurora Borealis.

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