After pulling the string tight, Miguel talked into his aluminum can. Brian could hear Miguel's voice through the aluminum can attached to the string. Which of the following best explains the sound Miguel made?

A.
The sound traveled through the air but not through the string.
B.
The sound traveled through the string but not through the air.
C.
The sound traveled through the string and the air at different speeds.
D.
The sound traveled through the string and the air at the same speeds.

Answer:

negative acceleration of 4m/s²

Explanation:

Given parameters:

Initial velocity  = 66m/s

Final velocity = 26m/s

Time taken = 10s

Unknown:

Description of the acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time.

It is mathematically expressed as;

    acceleration  = \(\frac{v - u}{t}\)

v is the final velocity

u is the initial velocity

t is the time taken

  Now insert the parameters and solve;

    Acceleration  = \(\frac{26 - 66}{10}\)   = -4m/s²

So, we see a negative acceleration of 4m/s²

Answer:

number one use carbon 14

Explanation:

Answer:

A

Explanation:

Carbon-14 testing of organic material such as wood can approximate the age by measuring the radioactive decay rate of the carbon-14 in the wood. From that a baseline for the trees age can be established and the ring patterns can by applied to a time period.

Given data

*The given mass of thin rim is m = 10 kg

*The given radius of the rim is r = 20 cm = 0.20 m

The formla for the moment of inertia of thin rim with respect to an axis perpendicular to its plane, which passes through a point on its circumference is given as

Substitute the known values in the above expression as

Hence, the moment of inertia of thin rim with respect to an axis perpendicular to its plane, which passes through a point on its circumference is I = 0.8 kg.m^2

The components of the vector v are given as:

where v is the magnitude of the vector and theta is the angle.

In this case we have v=253 and theta=55.8°, plugging this values into the y component we have:

Therefore the y component is 209.25 meters.

Answer:

It starts from rest so Vi=0

Vf=10 m/s

t=5 seconds

Explanation:

a=Vf-Vi/t

a=10-0/5

a=10/5

a=2m/s^s

Answer:

m= 0. 113 kg

W = 1.1074 N

g = 9.8 m/ s²

m= 870 kg

W = 8526 N

g = 9.8 m/s²

a) weight on earth:

weight = mass × acceleration due to gravity (g)

g on earth = 9.8 m/s²

W = 75 × 9.8

W = 735 N

b) g on Mars

285 = 75 × g

g = 285/ 75

g = 3.8 m/ s²

Answer:

B. compound

Explanation:

Because Salt (NaCl), sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts.

Answer:

B and either C or D

Explanation:

Answer:

False

Explanation:

velocity is more important than speed

Velocity is defined as the speed with direction.

This statement is true.

Velocity is different from speed look below at the differences.

Speed is defined as the ratio between distance over time while velocity is given as the ratio of displacement i.e. speed with direction over time.

Example: Velocity is the rate of motion, speed, or action. An example of velocity is a car driving at 75 miles per hour in the north direction.

Thus, the given statement is true.

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The only option that does not represent the relationship between culture and one's moral reasoning is one's thought and beliefs are generally independent of cultural influences.

Culture can be defined as the people's way of life. It is an umbrella term which encompasses the social behavior and norms found in human societies.

Moral reasoning is the process by which people apply their thought or make judgment in analyzing issues and making decisions.

Thus, the only option that does not represent the relationship between culture and one's moral reasoning is one's thought and beliefs are generally independent of cultural influences.

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Moving electric charges create electric and magnetic fields.

Electricity is the flow of electrical energy or charge through a material. It is a form of energy that comes from a variety of sources, including natural sources such as lightning, or from man-made sources such as batteries, generators, or power plants. Electricity is a fundamental part of modern life, and is used for a variety of purposes, from powering lights, appliances, and machines to providing heat and cooling. It is also used to transmit information over long distances, such as through telephone and internet networks.

Electric fields are created when a moving charge exerts a force on other charges, while magnetic fields are created when a moving charge creates a circular force around itself. Electric and magnetic fields can interact with each other and can cause a force to act on other electric charges.

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Answer:

watts are units of power, kilowatt-hours are units of energy

Explanation:

1 kilowatt-hour is = to 1000 watts used for 1 hour

Answer:

both

Explanation:

Silicon

Explanation:

The chemical element of atomic number 14, a nonmetal with semiconducting properties, used in making electronic circuits. Pure silicon exists in a shiny dark gray crystalline form and as an amorphous powder

The gravitational force exerted by the first lead ball on the second lead ball is slightly greater than the force exerted by the second lead ball on the first lead ball.  

The gravitational force exerted by an object on another object is given by the formula:

\(F = G * (m1 * m2) / r^2\)

where F is the gravitational force, G is the gravitational constant (approximately \(6.67 x 10^-11 N m^2 kg^-2)\), m1 and m2 are the masses of the two objects, and r is the distance between their centers.

In this case, the mass of the lead ball is m1 = 10.0 kg and the mass of the second lead ball is m2 = 110 g. The distance between their centers is r = 13.0 cm. Therefore, the gravitational force exerted by the first lead ball on the second lead ball is:

\(F1 = G * (10.0 kg * 110 g) / (13.0 cm)^2 = 1.13 x 10^-6 N\)

The gravitational force exerted by the second lead ball on the first lead ball is:

\(F2 = G * (110 g * 10.0 kg) / (13.0 cm)^2 = 1.25 x 10^-6 N\)

Therefore, the gravitational force exerted by the first lead ball on the second lead ball is slightly greater than the force exerted by the second lead ball on the first lead ball.  

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Answer: inertia

Explanation:

he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.

The frequency that we hear is 1484.74 hz.

Frequency is defined as  the number of waves (here sound waves) that pass through a point in a unit time.

Frequency that can be heard can be calculated by the formula,

f = {(V)/(V - Vsource)} * fsource

source = train

V = speed of the sound = 343 m/s

Vsource = 50 mph = 50 * 0.447 = 22.35 mps

fsource = 1388 hz

f = {(343)/(343 - 22.35)} * 1388

f = 1484.74 hz

Frequency that can be heard when the train passes with the speed of 50 mph is 1484.74 hz.

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Answer:

I don't know i really I'm sorry I wish I could help

Suppose that Joe and Jim are twins and :

________________________________

Joe :

Height = 1000 m

==》 PE = 150 × 1000

Weight = 150 N

==》 PE = 150,000 j

_________________________________

Jim :

Height = 1500 m

==》PE = 100 × 1500

Weight = 100 N

==》PE = 150,000 j

______________________________

As u can see Joe and Jim has equal PE before they begin skiing .

a. The total electric flux density for point P1(4, -3, 2) is X units.

b. The magnitude of the vector from point A to point D is Y units.

a. The total electric flux density for point P1(4, -3, 2) can be calculated using Gauss's Law. Gauss's Law states that the electric flux passing through a closed surface is proportional to the charge enclosed by that surface. In this case, we have three point charges located at A(5, -1, 5), B(8, -1, 2), and C(3, 7, -2), each with their respective magnitudes of charge. To find the total electric flux density at point P1, we need to consider the electric fields generated by each of these charges and their distances from P1. By summing up the contributions of these electric fields, we can determine the total electric flux density at P1.

b. To find the magnitude of the vector from point A to point D, we need the coordinates of point D. However, the coordinates of point D have not been provided in the given question. Without the coordinates of point D, it is not possible to calculate the magnitude of the vector from point A to point D accurately.

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Answer:

they all will die and so will we

Explanation:

Answer:

3 animals will thrive better

Explanation:

If the number of wolves is reduced, 3 animal species usually eaten by the wolves will have a better chance of survival.

The trade winds are created when winds travel toward the equator and the coriolis force a) decreases in strength.

The trade winds are prevailing easterly winds that blow towards the equator from the subtropical high-pressure belts located near the Tropic of Cancer and the Tropic of Capricorn. These winds are created due to the difference in temperature between the equator and the poles, which causes the warm air near the equator to rise and the cooler air from the subtropics to flow towards the equator.

However, the rotation of the earth also plays a role in the formation of the trade winds. The Coriolis force, which is caused by the rotation of the earth, causes the winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This deflection results in a clockwise circulation around the subtropical high-pressure belts and a counterclockwise circulation around the low-pressure zones near the equator.

Hence, the correct option is A.

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Answer:

Explanation:

If the surface area of an object is smaller, it will create more pressure

An object's surface area is inversely proportional to its pressure.

This can be demonstrated from the formula below

The can be defined as the perpendicular force acting per unit area. the S.I  unit of pressure is N/m².

In View of the above equation, It can be seen that as the surface area of an object reduces the pressure created by the object will increase.

Hence, If the surface area of an object is smaller, it will create more pressure

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Answer:

a)   A´= A  

b)   θ₁´ = 29º,  θ₂´ = - 169º ,  θ₃´ = -49º

Explanation:

In this exercise you are asked to give the magnitudes and angles of the vectors from another system of

reference

a) The magnitudes

The magnitude of a vector, the size of which is a scalar, this does not depend on the reference system, since it is obtained by subtracting the coordinates of the end point minus the coordinate of the origin of the vector

          A = \(x_{f}\)- x₀

if the vectors are measured in another reference frame

         x_{f}´ = xx_{f}- U

         x₀´ = x₀ -U

where U is the distance between the two reference frames

         A´ = x_{f}´ - x₀´

we substitute

         A´ = (x_{f} - U) - (x₀-U) = x_{f} - x₀

         A´ = A

 it does not change

b) Angles

The given angles are measured from the positive part of the x axis in a counterclockwise direction, it is asked to give these angles from the x axis

     θ₁ = 29º

     does not change

     θ₁´ = 29º

    θ₂ = 191º

   we measure clockwise

     θ₂´ = θ₂ - 360

     θ₂´ = 191 - 360

     θ₂´ = - 169º

     θ₃ =311º

    we measure clockwise

     θ₃´ = 311 -360

     θ₃´ = -49º

Answer:  D. 37.6 m/s

Explanation: its D

Answer:

Below

Explanation:

KE  ( = 1/2 mv^2) is remaining constant

PE ( = mgh) is increasing

Total ME is increasing  ( since PE is increasing)

   You should be able to answer this now.....

Its total mechanical energy is constant.

The energy that an object possesses as a result of its motion or position is known as mechanical energy. Kinetic energy, or the energy of motion, and potential energy are two types of mechanical energy (stored energy of position).

When an object is moving or is in a position other than the position with zero potential energy, it has mechanical energy (for example, a brick held at a vertical position above the ground or zero height position). The motion of a moving car generates mechanical energy (kinetic energy).

Because of its fast speed (kinetic energy) and vertical location above the ground, a moving baseball has mechanical energy (gravitational potential energy).

Therefore,  Its total mechanical energy is constant.

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Answer:

F_f = 370.636 N

Explanation:

We are given;

co-effficient of static friction;μ = 0.62

mass of the object;m = 61 kg

acceleration due to gravity;g = 9.8 m/s²

The maximum force of static friction is given by the formula:

F_f = μmg

Plugging in the relevant values, we have;

F_f = 0.62 × 61 × 9.8

F_f = 370.636 N

Now, we are told that a horizontal force of 272 N in the negative x direction to try and move.

Since the Frictional force exceeds this horizontal force, it means the Fridge is not going to move and would require a greater force

Matter falling into a black hole arranges itself in the shape of a disk that is thick at the outer edge, thin along the inner ring.

A black hole is a region of space time where gravity is so strong that nothing or  no particles or even electromagnetic radiation such as light can escape from it.

Thus, matter falling into a black hole arranges itself in the shape of a disk that is thick at the outer edge, thin along the inner ring.

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The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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