Based on the figure shown, about how far can sound travel in water in 2.5 s if the water temperature is 25°?
O a. 3,750 m
Oc. 600 m
Ob. 375 m
O d. 875 m

Magnitude of magnetic field = 8.94 mT

Direction is -ve y-direction using right hand rule

What is magnetic field?

The region around a magnet where the effects of magnetism are felt is known as the magnetic field. To describe how the magnetic force is dispersed in the area around and inside something magnetic in nature, we utilize the magnetic field as a tool. Let's get acquainted with the magnetic field, its strength, and its features in this article.

acceleration = net force / mass

         = qVB / m

   where  q = charge

    V = velocity

    B = magnetic field

m = mass of the proton

1.8*10^13 = 1.6*10^-19*2.1*10^7*B / 1.67*10^-27

B = 0.00894 T

  = 8.94 mT

magntiude of magnetic field = 8.94 mT

direction is -ve y-direction using right hand rule

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Answer:

D

Explanation:

D) The velocity was forty meters in 10 seconds, or 4 meters per second.

Answer:

This is because the acceleration of objects due to gravity is independent of the mass of the object and is constant for all objects, therefore, all objects fall with the same speed.

Explanation:

The weight of an object or force of gravity acting on an object on the surface of earth is a product of its mass and acceleration due to gravity.

Mathematically, w = mg

where, m=mass of the object; g = acceleration due to gravity

Also, from newton's law of gravitation, gravitational force on the object ,F = GMm/r²

where G is the gravitational constant; M is mass of Earth; m is mass of object; r is the distance of separation between the object and the center of mass of the earth which is approximately the radius of earth.

Since the weight of an object is equal to the force of gravitation acting on it

W = F

mg = GMm/r²

g = GM/r²

The expression above is that of the relationship between the force of gravity acting on a body on the earth's surface, the weight of that body and the acceleration due to gravity, g.

It can be seen that the acceleration due to gravity g is independent of the mass of the object. Therefore, the acceleration of objects due to gravity is constant for all objects and all objects fall with the same speed.

Answer:

The time of fall of an object is dependent only on the height of fall for a given acceleration due to gravity and it is independent of the object's mass

Explanation:

The gravitational force acting on an object on Earth can be observed as the weight, 'W', of the object which is a function of the mass, 'm', of the object and the relationship between the gravitational force and the mass of the object is given as follows;

W = m × g

Where;

g = The acceleration due to gravitational force = Constant

The relationship between the speed, 'u', and therefore, the time, 't', with which an object falls, the distance or height of fall, 'h', and the acceleration of the motion, 'g' is given as follows;

h = u·t + 1/2·g·t²

Given that the initial velocity of the object, 'u', of the object allowed to fall is u = 0 m/s, we have;

h = u·t + 1/2·g·t² = 0 × t + 1/2·g·t²

h = 0 × t + 1/2·g·t² = 1/2·g·t²

h = 1/2·g·t²

t² = 2·h/g

t = √(2·h/g)

Therefore, the time, 't', it takes every object to fall from a height, 'h', is dependent only on the height, 'h', for a given acceleration due to gravity, 'g' and it is independent of the mass, 'm', of the object.

Answer:

A

Explanation:

Image result for Which describes refraction? the reflection of light as it passes through a substance the focusing of light as it passes through a substance the emission of light as it passes through a substance the bending of light as it passes through a substance

When electromagnetic radiation, in the form of visible light, travels from one substance or medium into another, the light waves may undergo a phenomenon known as refraction, which is manifested by a bending or change in direction of the light.

The viscosity of the experimental lubricant is 83.63 cP. The calculated viscosity can be confirmed by comparing it with known viscosity values and conducting additional tests for validation.

To calculate the viscosity of the liquid, we can use the formula for terminal velocity in a viscous medium. The terminal velocity (V) is given by the equation V = (2/9)(g)(r^2)(ρb - ρl) / η, where g is the acceleration due to gravity, r is the radius of the ball, ρb is the density of the ball, ρl is the density of the liquid, and η is the viscosity of the liquid.

Rearranging the formula, we can solve for viscosity η, which gives us η = (2/9)(g)(r^2)(ρb - ρl) / V.

Plugging in the given values, we have g = 9.8 m/s^2, r = 0.001 m, ρb = 2120 kg/m^3 (converted from 2.12 g/cm³), ρl = 1060 kg/m^3 (converted from 1.06 g/cm³), and V = 0.0138 m/s (converted from 1.38 cm/s).

Substituting these values into the formula, we can calculate the viscosity in cP (centipoise) by multiplying the result by 1000, giving us 83.63 cP. To validate the calculated viscosity, it is important to compare it with known viscosity values for similar lubricants and conduct additional tests to ensure consistency and accuracy.

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Hence,option D . The rod is made up of plastic, the positive charge from the cloth to the rod.

Static charge or an electrostatic charge is a deficiency or extra of electrons that occurs on ungrounded or insulating surfaces. it's miles produced by way of triboelectric costs, expenses which can be generated by friction among surfaces, including the motion of paper thru a copier or printer.

An electrical charge is created when two materials come into contact or are rubbed collectively. when the substances are in touch, electrons can be actually rubbed off of one object and onto the alternative.

Static power is an imbalance of electric fees within or on the floor of a material. The fee stays till it could pass away by way of an electric present-day or electric-powered discharge.

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The tension in cable ADE can be found by using a free body diagram of point D.

A free body diagram is a visual representation of the forces and moments that act on an object, typically used in mechanics and physics to analyze the motion of objects. A free body diagram typically includes a drawing of the object, a vector for each force and/or moment, and an arrow indicating the direction of the force and/or moment.

The 10 kg mass is in equilibrium, meaning the sum of all forces in the x- and y-directions must be zero.

Using the equations for equilibrium in the x- and y-directions, we can solve for the tension in cable ADE. The force in cable AB is 9.98 m*g and the force in cable AC is 2.98 m*g.

The force in the rigid strut OA is 5.96 m*g. All of these can be found by solving the equations of equilibrium.

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Answer:

7 miles southwest

9 steps to the left

75 mph north

Explanation:

A vector quantity has magnitude and directions. Vector is a terminology used to describe physical quantities with this attribute.

The opposite of vectors are scalar quantities. They only have magnitude but no direction.

7 miles south west is displacement of a body

9 steps to the left is displacement

75mph north is a velocity

Displacement and velocity are physical quantities that are vectors

Answer:

A. Neon and argon

General Formulas and Concepts:

Explanation:

Elements that have a full valence shell (the outermost shell), are in Group 18 of the Periodic Table.

Because their outermost shell is full, they are inert, meaning that they do not like to bond or react with other elements.

Therefore, these gases with a stable full valence shell are known as Noble Gases.

A. would be the correct answer.

Answer:argon and krypton

Explanation:

Noble gases

When osmium goes from a solid to a liquid and finally a gas, the element has undergone phase changes

The osmium is a transition chemical element which is also known as "Os" in the periodic table. Its atomic number is 76. It is hard, brittle, bluish metal at room temperature, but it can be liquid when it heats up until its melting point (3000°C) and if it keeps heating it can finally be a gas when it reaches its boiling point (5500°C).

The phase change materials, also known as PCMs, are the elements able to absorb, store and release large amounts of heat over a defined temperature range when the element changes phase or state.

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When the distance between two point charges is increased by a factor of 2, the force they exert on each other decreases to 1/4 of the original force. The relation is governed by the Coulomb's Law.

According to Coulomb's Law, the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. In this scenario, if the distance between the charges is increased by a factor of 2, it means that the new distance is twice the original distance.

Since the force is inversely proportional to the square of the distance, doubling the distance will result in the force becoming 1/4 of the original force. Mathematically, this can be represented as follows:

\(F' = F / (2^2)\)

\(F' = F / 4\)

Therefore, the force between the two charges will become 1/4 (or 25%) of the original force when the distance between them is increased by a factor of 2.

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Answer:

3.a. 6m away

b. 3m away

Explanation:

a)

Effort = 10000N

Load=5000 N

effort distance=3 m

load distance=?

We can use the following equation to calculate the distance of the load from the fulcrum:

\(\boxed{\bold{\tt{Load * Load \:Distance = Effort * Effort \:Distance}}}\)

Plugging in the known values, we get:

\(\bold{\tt{5000 N * Load Distance = 10000 N * 3 m}}\)

dividing both side by 5000 N

\(\bold{\tt{Load\: Distance =\frac{ 10000 N * 3 m }{5000 N}}}\)

Load Distance = 6 m

Therefore, the load must be 6 meters away from the fulcrum in order for the crane to be balanced.

b)

If the load is increased to 10,000N, the effort and effort distance do not change.

Effort = 10000N

Load=10,000 N

effort distance=3 m

load distance=?

This is because the moment of the load will increase, and the moment of the effort will remain the same.

The moment of the load is calculated as follows:

\(\boxed{\bold{\tt{Load * Load \:Distance = Effort * Effort \:Distance}}}\)

Plugging value

\(\bold{\tt{10,000 N * Load Distance = 10,000 N * 3 m}}\)

dividing both side by 10,000 N

\(\bold{\tt{Load\: Distance =\frac{ 10,000 N * 3 m }{10,000 N}}}\)

New Load Distance = 3 m

Therefore, if the load is increased to 10,000N, it should be placed 3 meters away from the pivot point to balance the crane.

The number of grains of sand on a beach is likely to be a relatively small number, and therefore would not require scientific notation.

The measurement that would be least likely to be written in scientific notation is the number of grains of sand on a beach. Scientific notation is typically used for very large or very small numbers, where the number is expressed as a decimal multiplied by a power of 10.

In this case, the number of stars in a galaxy and the population of a country can both be very large, and therefore would be more likely to be written in scientific notation. The speed of a car can also be expressed as a decimal multiplied by a power of 10 if it is extremely fast or slow. However, the number of grains of sand on a beach is likely to be a relatively small number, and therefore would not require scientific notation.

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Answer:

13=c

14=a

other question=d

Answer:

If it is a True or False question then the answer would be TRUE

Explanation:

Answer:

C. 3m/s^2

Explanation:

Answer:

wuuwue eueueueuueueuueueueueueueueueeieueieieieieieueiueeuueueuueueuueueurururyyr it yttururururururururururururuur it ueue it ueuueeueueueueueeieueuueueeueiueue

Answer:

When Tyrell's hands get warm the particles in his hands are moving faster or more rapidly.

Explanation:

The center of mass is the point located in an average position concerning the objects' positions and their masses. (a/3;a/3) is the location of the COM.  

The center of masses of a given system of particles or objects is the position under which all external forces are acting. Any uniform force acts on this point.

This position is the average position of all the components of the system concerning their masses. It can be placed in one, two or three dimensions according to the system.

Coordinate X of the center of masses is given by the following formula,

Xcom = Σ(Ximi) / Σmi

This is the adition (Σ) of each particle position on the X-axis (Xi) multiplied by their mass (mi), and the result divided by the summation of all masses -total mass-.

In the same way, coordinate Y of the center of masses is given by the following formula,

Ycom = Σ(Yimi) / Σmi

This is the adition (Σ) of each particle position on the Y-axis (Yi) multiplied by their mass (mi), and the result is divided by the summation of all masses.

The center of masses is located in the position (X, Y).

According to this framework, we can get the coordinates of the center of masses for this bidimensional system. Coordinates can be expressed in meters or centimeters (m or cm).

Data:

     Particle ⇒ (X;Y)

Coordinate X  ⇒  Xcom =  Σ(Ximi) / Σmi

                             Xcom =  (0m) + (0m) +(am) / m +m +m

                             Xcom =  am / 3m

                             Xcom =  a/3

Coordinate Y  ⇒  Ycom =  Σ(Yimi) / Σmi

                             Ycom =  (am) + (0m) +(0m) / m +m +m

                             Ycom =  am / 3m

                             Ycom =  a/3

Coordinates of the center of masses, (X;Y) = (a/3 ; a/3)

(a/3 ; a/3) is the location of the center of mass in the proposed bidimensional system.

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Answer:

I'm sorry, but as an AI language model, I don't have a PE textbook to access the "Healthy Lifestyle Questionnaire" on page 413. However, I can tell you that the questionnaire is a self-assessment tool designed to help individuals evaluate their current lifestyle habits and identify areas for improvement. It covers topics such as physical activity, nutrition, stress management, and sleep. The score obtained from the questionnaire can provide insight into one's overall health and well-being. If you have access to the questionnaire, I encourage you to take it and reflect on your score to identify areas where you can make positive changes to improve your health and well-being.

The questionnaire on healthy lifestyle will be used to assess an individual's lifestyle habits such as including exercise, nutrition, sleep, stress and substance use.

This questionnaire can reveal information about people lifestyle habits because its provids insight into areas where changes need to be made to improve overall health and well-being.

When a respondent answers question about issues like exercise, nutrition, the researchers can gain understanding of their current habits and identify areas where they may need to make changes.

Therefore, the information derived therein can then be used to develop a personalized plan for improving health and achieving wellness goals.

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Answer:

the first one i think

Explanation:

Answer:

Proper nouns

hope this helps =3

The velocity when function p(t)=11 is 8 .

According to the question

The position of a car at time t  represented by function :

\(p(t)=t^{2} +2t-4\)

Now,

When  function p(t) = 11 , t will be

\(p(t)=t^{2} +2t-4\)

11 = t²+2t-4

0 = t² + 2t - 15

or

t² +2t-15 = 0

t² +(5-3)t-15 = 0

t² +5t-3t-15 = 0

t(t+5)-3(t+5) = 0

(t-3)(t+5) = 0  

t = 3 , -5  

as t cannot be -ve as given ( t≥0)

so,

t = 3

Now,

the velocity when p(t)=11

As we know velocity = \(\frac{position}{time}\)

therefore to get the value of velocity from  function p(t)

we have to differentiate the function with respect to time

\(\frac{d(p(t))}{dt} =\frac{d}{dt} (t^{2} +2t-4)\)

v(t) = 2t + 2  

where v(t) = velocity at that time

as t = 3 for  p(t)=11  

so ,

v(t) = 2t + 2  

v(t) = 2*3 + 2  

v(t) = 8

Hence, the velocity when function p(t)=11 is 8 .

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Answer:

ii) Insulating materials that gain electrons when rubbed become negatively charged. c) An electric current is a flow of charge. d) An isolated metal object that is initially uncharged will gain charge if it is brought into contact with a charged object. e) A metal object is earthed by connecting it to the ground.

Explanation:

hope this helps you :)

Answer:

Momento = 170.8 Kgm/s

Explanation:

Dados los siguientes datos;

Masa = 3,05 kg

Velocidad = 56 m/s

Para encontrar el impulso;

El momento se puede definir como la multiplicación (producto) de la masa que posee un objeto y su velocidad. El momento se considera una cantidad vectorial porque tiene magnitud y dirección.

Matemáticamente, el momento viene dado por la fórmula;

\( Momento = masa * velocidad \)

Sustituyendo en la fórmula, tenemos;

\( Momento = 3.05 * 56 \)

Momento = 170.8 Kgm/s

Answer:

C. unlikely to combine with other elements.

Explanation:

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Noble gases are chemical elements with eight valence electrons and as such have a full octet. Some examples are argon, neon, etc.

Hence, the full octet makes the gas (neon) unlikely to combine with other elements.

The angle of attack is approximately 4 degrees.

A more detailed explanation of the answer.

To find the angle of attack for a NACA 4415 airfoil with a 2m chord in an airstream with a velocity of 50 m/s and a lift per unit span of 1,595 N, follow these steps:

1. Calculate the dynamic pressure (q):
q = 0.5 * ρ * V^2
where ρ is the air density at standard sea-level conditions (1.225 kg/m³) and V is the airstream velocity (50 m/s).

q = 0.5 * 1.225 * (50)^2 = 1,531.25 N/m²

2. Calculate the lift coefficient (Cl):
Lift per unit span (L') = Cl * q * chord (c)
1,595 N = Cl * 1,531.25 N/m² * 2m

Now, solve for Cl:
Cl = 1,595 / (1,531.25 * 2) = 0.5208

3. Refer to a NACA 4415 lift coefficient vs angle of attack graph or data table to determine the angle of attack corresponding to the calculated Cl value. Since the Cl value is 0.5208, the angle of attack is approximately 4 degrees.

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Answer:

Explanation:

When a coil of wire is moved around a magnet, it induces electrons into the wire and creates electric current. Thus, the correct option is

moves through and cuts magnetic field lines

It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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