What type of reflection would you get from a rough surface?

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer: It is true.

Explanation: In all atoms, the number of electrons and protons is always equal. This preserves the atom's electrical neutrality by balancing positive and negative charges. If the amount of electrons and protons in an atom is not equal, the atom will have a net positive or negative charge, forming a cation or an anion.

Answer:

Kinetic energy is present in an object which is in motion.

Explanation:

The initial momentum of the 25 kg object is 25 kg * 12 m/s = 300 kgm/s. After the collision, the momentum of the 25 kg object is 25 kg * 8 m/s = 200 kgm/s. According to the conservation of momentum, the momentum lost by the 25 kg object is equal to the momentum gained by the box. Therefore, the resulting momentum of the box is 300 kgm/s - 200 kgm/s = 100 kg*m/s.

Answer:

s = d/t = 20 m/40 s = 0.5 m/s

Explanation:

A swimmer swims a distance of 20 m in a time of 40 seconds, then the speed of the swimmer is 0.5 m/s.

The speed of an entity, which is a scalar quantity in regular usage and kinematics, can be defined as the size of the change in direction per unit time or the size of the change in position over time for an object. The initial speed is the upper limit of maximum pace as the duration of a time interval gets closer to zero.

The average pace of the object over an amount of time is computed by subtracting its distance traveled by the length of the interval. Velocity and speed are not the same.

As per the given data provided by the question,

Distance, d = 20 meters

Time, t = 40 seconds

Then average speed, s = d/t

s = 20/40

s = 0.5 m/s.

Therefore, the average speed of the swimmer is 0.5 m/s.

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Answer: \(4.65\ m/s\)

Explanation:

Given

Distance putty has to travel is 3.5 m

The initial speed of putty is 9.50 m/s

Using equation of motion to determine the velocity of putty just before it hits ceiling

\(v^2-u^2=2as\)

\(\Rightarrow v^2-(9.5)^2=2(-9.8)(3.5)\\\\\Rightarrow v^2=9.5^2-68.6\\\Rightarrow v=\sqrt{90.25-68.6}\\\Rightarrow v=4.65\ m/s\)

So, the velocity of putty just before hitting is \(4.65\ m/s\)

Answer:

The answer is ciliary body and focus the pupil. In addition, the ciliary body is a portion of the eye that contains the ciliary muscle that reins the shape of the lens and the ciliary epithelium that yields the aqueous humor. The ciliary body is a share of the uvea which is the layer of tissue that transports oxygen and nutrients to the eye nerves while the pupil is a hole positioned in the midpoint of the iris of the eye that permits light to foray the retina. It looks black since light rays incoming the pupil are moreover engrossed by the tissues in the eye openly or engrossed after diffuse reflections in the eye that typically miss leaving the fine pupil

Explanation:

Answer:the eye has many parts that must work together in order to produce clear vision

Explanation: correct on my test

Given data:

* The mass of the object is m = 900 kg.

* The initial velocity of the object is u = 25 m/s.

* The final velocity of the object is v = 0 m/s.

* The time taken by the object is t = 5 seconds.

Solution:

The force required to stop the object is,

Substituting the known values,

Here, the negative sign indicates the force is applied in the opposite direction to the direction of motion of an object.

Thus, the force applied to the object is - 4.5 kN.

Answer:

Specific heat capacity is an intensive property and does not depend on sample size.

Explanation:

Answer:

Is it only me who can't understand your question?

Pls give the full question ...

Hope you have a great day!

The following statement which is true is :  A correlation of .33 is just as strong as a correlation of -.33.

The tendency of two or more systems that independently exhibit simple behavior to show complex and novel behavior together because of their interaction is called correlation.

Correlation is a statistical measure that expresses extent to which two variables are linearly related implying that they change together at a constant rate. It is common tool for describing simple relationships without making statement about cause and effect.

Correlation between variables does not mean that the change in one variable is the cause of the change in the values of other variable.

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Answer:

A ruler.

Explanation:

Just measure height, length and width and multiply each.

Net force causes an acceleration or change in the motion of an object.

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

The second law states that the force applied to an object is directly proportional to the product of mass and acceleration of the object. The object tends to move in the direction of the net force.

Acceleration is defined the change in the velocity per change in the time of motion of the object.

\(a = \frac{\Delta v}{\Delta t} \\\\\)

where;

Thus, we can conclude that net force causes an acceleration or change in the motion of an object.

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The speed of the roller coaster at the bottom of the hill if the track was frictionless is 34.04 m/s.

Given that the weight of the roller coaster is 2000 kg and the initial vertical drop of the ride is 59.3 m. We are to find the speed of the roller coaster at the bottom of the hill if the track was frictionless.We know that the roller coaster will lose potential energy due to the vertical drop. Assuming there is no friction, the potential energy will be converted into kinetic energy at the bottom of the hill.Considering the conservation of energy between the potential and kinetic energy, we can set the initial potential energy equal to the final kinetic energy. We can use the formula to calculate potential energy, which is PE = mgh where m = 2000 kg, g = 9.8 m/s², and h = 59.3 m. Therefore,PE = 2000 kg × 9.8 m/s² × 59.3 m = 1,157,924 JWe can use the formula to calculate kinetic energy, which is KE = 1/2mv² where m = 2000 kg and v is the final velocity. Therefore,KE = 1/2 × 2000 kg × v².The total energy remains constant as we know there is no friction. Therefore the final kinetic energy will be equal to the initial potential energy,1,157,924 J = 1/2 × 2000 kg × v²v² = (2 × 1,157,924 J) / 2000 kgv² = 1157.924v = √1157.924v = 34.04 m/s.

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The current remains the same in all parts of a series circuit.

The correct option is B.

A circuit is a complete path for the flow of electric current.

A series circuit is a circuit that the component of the circuit are connected end-to-end and the flow of current is in one direction.

Another form of connection is the parallel connection in which current flows through alternate paths.

In a series circuit, the flow of current is constant and remains the same in all parts of a series circuit. However, the voltage across the circuit varies.

In a parallel circuit,  the voltage is constant and remains the same in all parts of a parallel circuit.  However, the flow of current across the circuit varies.

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Answer:

The numerical limits imposed on imported goods through quotas ultimately leads to higher prices paid by consumers. Essentially, the import quota prevents or limits domestic consumers from buying imported goods. The import quota reduces the supply of imports.

Explanation:

The electric force on the proton is 7.9 x 10⁻²² N.

Electric force is defined as the force between two charged objects. According Coulombs law, this force is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges.

F = kq₁q₂/r²

where;

The distance between the two charges is calculated as follows;

r = √(y² + x²)

r = √(0.36² + 0.4²)

r = 0.54 mm

F = (9 x 10⁹ x 1.6 x 10⁻¹⁹ x 1.6 x 10⁻¹⁹) / (0.54 x 10⁻³)²

F = 7.9 x 10⁻²² N

Thus we can conclude that a proton is at the origin and an electron is at the point x = 0.36 nm , y = 0.40 nm will experience a force of 7.9 x 10⁻²² N.

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Answer:

Below

Explanation:

EPE = 1/2 k x^2      for a spring  where x = amount of compression or stretch

 450 = 1/2 (100) x^2

  450 ( 2)/100 = x^2 = 9     so x = 3 m

Regarding a spring-mass system's duration, the square root of the mass and the spring constant have opposing correlations. The length of spring will be longer and vice versa as the mass grows. Therefore, the mass influences spring.

They swing back and forth around a stationary point. Classic examples of this type of vibrating motion are a simple pendulum and a mass on a spring.

Therefore, The use of motion detectors demonstrates that the vibrations of these objects have a sinusoidal nature, even if this is not obvious from plain viewing.

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Answer:

Dunno

Explanation:

Dunno

Answer:

hi what is your question?? say in English please

Answer:

Right

Explanation:

Coil move right yes

Answer:

I was also going to ask same question edited:ok i found its true

The frictional force involved when a penny sinks to the bottom of a wishing well is primarily due to viscous drag or fluid friction. As the penny moves through the water, it experiences resistance from the surrounding fluid. This resistance is caused by the frictional forces between the water molecules and the penny's surface.

Answer:

Friendships can have a major impact on your health and well-being, but it's not always easy to build or maintain friendships. Understand the importance of friendships in your life and what you can do to develop and nurture friendships