When are children MOST likely to begin using words to express meaning? A. before 12 months B. between 12 and 18 months C. between 18 months and 2 years D. between 2 and 3 years

Explanation:

i thnk its about how to make the work and you should use this formula W=Fd and because it doesnt tell us about mass of person so I preper to decide A.

longitudinal and transverse waves exhibit similarities in terms of their lack of significant movement and non-transport of matter. However, their fundamental distinction lies in the orientation of particle oscillations and the direction of energy transfer: parallel for longitudinal waves and perpendicular for transverse waves.

Longitudinal waves and transverse waves share certain similarities but also exhibit distinct characteristics in terms of their movement and energy transfer.

Both types of waves propagate through a medium but differ in the orientation of their oscillations and the direction of energy transfer.

Longitudinal waves move particles of the medium parallel to the direction of wave propagation. As the wave travels, the particles oscillate back and forth along the same axis as the wave's motion.

Examples of longitudinal waves include sound waves, where air particles vibrate parallel to the direction of the sound wave, creating areas of compression and rarefaction.

In contrast, transverse waves exhibit oscillations perpendicular to the direction of wave motion. The particles in the medium move up and down or side to side, perpendicular to the wave's propagation.

Examples of transverse waves include electromagnetic waves, such as light waves or radio waves, where the electric and magnetic fields oscillate perpendicular to the direction of wave travel.

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The acceleration of the cheetah is 4.07 m/s^2.

Acceleration is the rate of change of the velocity of an object with respect to time. The unit of acceleration is meter per seconds squared (m/s^2). The equation of acceleration is given below.

a = (v_f - v_i)/t

Where a = acceleration, v_f = final velocity, v_i = initial velocity and t = time.

Here, the final velocity = 26.5 m/s, initial velocity = 0 m/s (cheetah is at rest) and time = 6.5 s. The acceleration of the cheetah will be,

a = (26.5 - 0)/6.5

a = 4.07 m/s^2

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Answer:

Unbalanced

Explanation:

Answer: F. Conclusion

Explanation:

Answer:

I think the answer is C. Truth Value

Explanation:

a Truth Value is the attribute assigned to a proposition in respect of its truth or falsehood, which in classical logic has only two possible values

We have that the Force  is mathematically given as

F=170.833N

Question Parameters:

Generally the equation for the Force   is mathematically given as

\(F=\frac{T}{d}\)

Therefore

F=41/0.24

F=170.833N

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Answer:

Theres no given?

Explanation:

Well, whatever.

I observed the shift of their sunset time.

Examples like:

January to June = their sunset time increased while

July to December = their sunset time decreased

Answer:

\(E = 2.84 * 10^5 N/C\)

Explanation:

The speed increased from 2.0 * 10^7 m/s to 4.0 * 10^7 m/s over a 1.2 cm distance.

Let us find the acceleration:

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

\((4.0 * 10^7)^2 = (2.0 * 10^7)^2 + 2 * a * 0.012\\\\(4.0 * 10^7)^2 - (2.0 * 10^7)^2 = 0.024a\\\\1.2 * 10^{15}= 0.024a\\\\a = 1.2 * 10^{15} / 0.024\\\\a = 5 * 10^{16} m/s^2\)

Electric force is given as the product of charge and electric field strength:

F = qE

where q = electric charge

E = Electric field strength

Force is generally given as:

F = ma

where m = mass

a = acceleration

Equating both:

ma = qE

E = ma / q

For an electron:

m = 9.11 × 10^{-31} kg

q = 1.602 × 10^{-19} C

Therefore, the electric field strength of the electron is:

\(E = \frac{9.11 * 10^{-31} * 5 * 10^{16}}{1.602 * 10^{-19}} \\\\E = 2.84 * 10^5 N/C\)

Answer: Fitness assessments are designed to screen for risk of heart disease.

Explanation:

Fitness assessments are medical examinations that are designed to measure a person's physical fitness and identify any health risks they may have. These assessments may include tests of strength, endurance, flexibility, and cardiovascular fitness. One of the primary objectives of a fitness assessment is to screen for the risk of heart disease, which is a major health concern that can be prevented or treated through exercise and other lifestyle changes. While fitness assessments may identify specific injuries or medical conditions, their primary focus is on evaluating a person's overall health and fitness.

Answer:

12m/s

Explanation:

mark as a brainlist

Explanation:

Given that,

A ball is tossed straight up with an initial speed of 30 m/s

We need to find the height it will go and the time it takes in the air.

At its maximum height, its final speed, v = 0 and it will move under the action of gravity. Using equation of motion :

v = u +at

Here, a = -g

v = u -gt

i.e. u = gt

\(t=\dfrac{u}{g}\\\\t=\dfrac{30\ m/s}{9.8\ m/s^2}\\\\t=3.06\ s\)

So, the time for upward motion is 3.06 seconds. It means that it will in air for 3.06×2 = 6.12 seconds

Let d is the maximum distance covered by it.

\(d=ut-\dfrac{1}{2}gt^2\)

Putting all values

\(d=30(3.06)-\dfrac{1}{2}\times 9.8\times (3.06)^2\\\\d=45.91\ m\)

Hence, it will go to a height of 45.91 m and it will in the air for 6.12 seconds.

Answer:

b Day-to-day condition of the atmosphere

Explanation:

Weather is short term, Climate is long term

Answer:

Average atmospheric condition.

Explanation:

Answer:

0.41s

Explanation:

solve for t and y

,........

Answer:

Temperature is a measure of the average kinetic energy of the particles in an object.

Explanation:

Often heat and temperature are used interchangeably — this is wrong. While the two concepts are related, temperature is distinct from heat.  Temperature        describes the  energy of a system, whereas heat refers to the energy transferred between two objects at different temperatures.

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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We are given the following information

Mass of objects: m = 4.72 kg

Distance between objects: r = 3.12 m

Charge: q = 85.5 μC

We are asked to find the initial acceleration of each mass.

Recall from Newton's second law of motion,

Where F is the force between two masses, m is the mass, and a is the acceleration.

First, let us find the force between the two masses.

Recall from Coulomb's law,

Where k is the Coulomb's law constant that is k = 9×10⁹ Nm²/C²

Substitute the given values into the above formula

Finally, the initial acceleration of each mass is

Therefore, the initial acceleration of each mass is 1.43 m/s^2

3. Fulcrum left

Explanation:

Answer:

T = 4.905[N]

Explanation:

In order to solve this problem we must perform a sum of forces on the vertical axis.

∑Fy = 0

We have two forces acting only, the weight of the body down and the tension force T up, as the body does not move we can say that it is system is in static equilibrium, therefore the sum of forces is equal to zero.

\(T-m*g=0\\T=0.5*9.81\\T=4.905[N]\)

A) There are 3.70 x 10¹⁶ Cs nuclei present initially and B) There are 2.27 x 10¹⁵ Cs nuclei present 2.6 min later.

A) To solve this problem, we can use the following equation,

\(N = N'2^{\frac{-t}{T_{1/2}}}\)), number of Cs nuclei present is N, initial number of Cs nuclei present is N', elapsed time is t, half-life of Cs-124 is T½. First, we need to convert the initial mass of Cs-124 to the number of nuclei present,

7.5 μg Cs-124(1g/10⁶μg)(6.022x10²³nuclei/1g)

= 4.52 x 10¹⁵ Cs-124 nuclei.

Using the equation above, we can find the number of Cs-124 nuclei present after 0 s,

\(N = 4.52 * 10^{15} * 2^{\frac{-0}{30.8}}}\)

= 4.52 x 10¹⁵ Cs-124 nuclei

Therefore, initially, there are 4.52 x 10¹⁵ Cs-124 nuclei present.

B) After 2.6 min (156 s), we can again use the same radioactivity equation to find the number of Cs-124 nuclei present,

\(N = 4.52 * 10^{15} * 2^{\frac{-156}{30.8}}}\)

N = 1.60 x 10¹⁴ Cs-124 nuclei

Therefore, 2.6 min later, there are 1.60 x 10¹⁴ Cs-124 nuclei present.

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Answer:

Explanation:

1) Any motion in which the acceleration is orthogonal to the direction of travel will have this characteristic:

  circular motion in a plane

  motion of a charged particle in a magnetic field perpendicular to the direction of travel

__

2) Motion in which the speed is constant, regardless:

  motion of a photon through a varying gravitational field

Elements combine to form compounds. The correct answer is A.

Elements combine with each other in chemical reactions to form compounds. A compound is a substance composed of two or more different elements chemically combined in a fixed ratio by mass. For example, water is a compound composed of hydrogen and oxygen in a fixed ratio of 2:1 by mass.

B. Molecules are formed when two or more atoms combine chemically, but these atoms can be of the same element or different elements. For example, oxygen gas (O2) is a molecule composed of two oxygen atoms.

C. Atoms are the smallest unit of matter that retains the properties of an element. Atoms do not combine to form other atoms or compounds.

D. Mixtures are composed of two or more substances physically mixed together, but the substances retain their individual properties and can be separated by physical means. Mixtures are not formed by the chemical combination of elements. Examples of mixtures include air and saltwater.

Therefore, The correct answer is option A.

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Answer:

   ρ = 4.4 10⁻⁸ Ω m

Explanation:

For this exercise let's start by finding the value of the resistance using Ohm's law

          V = I R

           R = V / I

The voltage is related to the electric field

          V = E L

let's substitute

          R = E L / I

          R = 8.2 10⁻² / 20  

          R = 4.1 10⁻³ L

now we can use the resistance relation

          R = ρ L / A

the area of ​​a circular wire is

          A = π r² = π d² / 4

         ρ = R π d² / (4 L)

let's calculate

        ρ = (4.1 10⁻³ L) π 0.0037² / (4 L) = (4.1 10⁻³) π 0.0037² / (4)

        ρ = 4.4 10⁻⁸ Ω m

The resistivity of the wire is 4.4 10⁻⁸ Ω m.

We know that;

V = I R

R = V / I

The voltage  the electric field can be connected using the formula;

V = E L

Hence;

R = E L /I

R = 8.2 10⁻² / 20  

R = 4.1 10⁻³ L

For resistivity;

R = ρ L / A

the area can be obtained from;

A = π r² = π d² / 4

ρ = R π d² / (4 L)

ρ = (4.1 10⁻³ L) π 0.0037² / (4 L) = (4.1 10⁻³) π 0.0037² / (4)

ρ = 4.4 10⁻⁸ Ω m

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Answer: ok, so there should be no speed at the 5th second but there was somehow it was the car fault

∞ω∞

Answer:

A

Explanation:

The general equation which represents an exothermic reaction is :

reactants - energy → products

This is because on undergoing an exothermic reaction, heat energy is released, which means that the initial energy of the reactants is lost (subtracted).

Answer:

It's true I took the test on Edge.

Explanation:

Answer:

True

Explanation:

Got it right on edg

The center of the stick from the left edge of the stick is at,

The mass 125 g is at the distance of 25 cm from the hanging.

Thus, the distance of center of the stick from the hanging is,

As the stick is balanced,

Thus, the net moment due to the mass of the stick and given 125 g mass is zero.

where g is the acceleration due to gravity,

Substituting the known values,

Thus, the mass of the stick is 125 grams.

In the terms of kilogram, the value of the mass is,

The value of the mass in newton is,

Thus, the value of the weight of the stick is 1.225 N.