What is another name for the rare earth elements?
a.
Group 1
c.
Group 6
b.
Lanthanide
d.
Alkaline Earth

Answer:

We conclude that the required momentum is 80 kgm/s.

Explanation:

Given

To determine

The momentum p = ?

Important Tip:

We can determine the momentum using the formula

\(p = mv\)

where

now substituting m = 20 and v = 4 using the equation

\(p = mv\)

\(p = (20) (4)\)

\(p = 80\) kg m/s

Therefore, we conclude that the required momentum is 80 kgm/s.

The momentum of the moving cart is 80kgm/s.

HOW TO CALCULATE MOMENTUM:

Momentum (p) = mass (m) × velocity (v)

Momentum (p) = 20kg × 4m/s

Momentum (p) = 80kg*m/s.

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The amount of lateral strain in a tension member can be calculated using Poisson's ratio.

To calculate the lateral strain, we can use the equation: ε_lateral = -ν * ε_longitudinal

Where:

ε_lateral = Lateral strain

ν = Poisson's ratio

ε_longitudinal = Longitudinal strain

Poisson's ratio (ν) is a material property that describes the ratio of lateral strain to longitudinal strain when a material is subjected to an axial load. It is defined as the negative ratio of the transverse strain to the longitudinal strain.

Calculating the lateral strain involves determining the longitudinal strain, which can be calculated using the equation:ε_longitudinal = ΔL / L

Where:

ε_longitudinal = Longitudinal strain

ΔL = Change in length of the tension member

L = Original length of the tension member

Once the longitudinal strain is calculated, we can use Poisson's ratio to determine the lateral strain by multiplying the longitudinal strain by the negative value of Poisson's ratio.

It is important to note that the lateral strain is typically very small compared to the longitudinal strain in a tension member, especially for materials with a low Poisson's ratio.

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Centripetal acceleration is responsible for changing the direction of an object in uniform circular motion while maintaining a constant speed.

In uniform circular motion, an object travels along a circular path with a constant speed. Although the speed remains constant, the velocity of the object changes because velocity is a vector quantity that includes both magnitude (speed) and direction. As the object moves around the circle, its velocity vector constantly changes its direction towards the center of the circle. This change in velocity creates an acceleration called centripetal acceleration, which is always directed towards the center of the circular path. This acceleration enables the object to maintain its circular motion by continuously changing its direction.

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Answer:

I think it's E.

Explanation:

Because I know

This force acting on the wind flow at Little Rock can be described as being directed generally toward a particular direction.

However, it is important to note that wind patterns are influenced by various factors, including local topography, weather systems, and seasonal variations. Therefore, the precise direction of the wind force at any given moment can vary.

Little Rock, the capital city of Arkansas, is located in the southeastern United States. The prevailing wind patterns in this region are influenced by the general weather patterns and geographic features of the area.

In the United States, wind patterns are commonly influenced by the movement of weather systems from west to east. Based on this general pattern, the prevailing winds in Little Rock often come from the south or southwest. This is because air masses tend to move in a counterclockwise direction around low-pressure systems, resulting in a southerly flow of air.

Additionally, Little Rock is situated near the southern edge of the Central Plains, which can also contribute to a south or southwest wind component. The presence of the Ozark Mountains to the north and the Gulf of Mexico to the south can further influence wind patterns in the region.

However, it is important to note that wind direction can change based on daily weather conditions, seasonal variations, and local influences. Therefore, while the prevailing wind direction in Little Rock is generally from the south or southwest, specific wind events and local conditions can cause temporary variations in wind direction.

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Answer: Newton

Explanation:

Isaac Newton is viewed as one of history's most persuasive researchers. During his lifetime, Newton created the hypothesis of gravity, the laws of movement (which turned into the establishment of material science), another strategy for arithmetic known as analytics, and leap forwards in optics like the reflecting telescope.

Answer: Last option (total energy always remains constant)

Explanation:

The Law of Conservation basically states that energy cannot be created or destroyed. Only changed from one form to another (potential, kinetic, chemical, etc.) so it makes sense that the net energy is unchanging.

Answer:

Inversly or Indirectly

Explanation:

the voltage (V) and inversely proportional to the resistance (R).

Hope it helps!

Jupiter is the fifth planet from our Sun and is, by far, the largest planet in the solar system – more than twice as massive as all the other planets combined.

Planets are celestial bodies that orbit around a star, have sufficient mass to assume a nearly spherical shape, and have cleared their orbits of smaller objects. They are a key component of our solar system and the universe at large. Planets are typically classified as either rocky (like Earth) or gaseous (like Jupiter). Rocky planets have a solid surface and a metallic core, while gaseous planets are composed primarily of hydrogen and helium, with no distinct solid surface.

Planets exert gravitational forces on each other, which can cause them to change their orbits or even collide. This gravitational interaction is what drives many of the phenomena observed in our solar system, such as the formation of planetary rings and the creation of orbital resonances. Studying planets is important for understanding the evolution of the universe and the potential for life beyond Earth. It involves a wide range of disciplines, including astrophysics, geology, and atmospheric science.

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The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

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Answer:

2 minutes or 120 seconds

Explanation:

The answer is 2 minutes or 120 seconds because 36 km is 36000 m and 36000 divided by 300 is 120, so the answer is 120 seconds, and converted to 2 minutes. Hope it helps!

Answer:

Explanation:

Yes, the nucleus contains neutrons along with protons.

Displacement in unit vector is  85i + 85j.

When moving from one location to another, the displacement vector resembles an arrow, with its tip at the second point and its tail at the first. The length of the arrow is a symbol for the displacement vector's magnitude, which represents the distance between the locations.

Calculation:

The mathematical notation for the displacement vector R is given by

R cosφi + R sinφj

Now a bird flies straight northeast a distance of 95.0 km for 3.0 h such that x-axis points towards east and the y-axis points towards north.

Now put R = 95 and φ =  45

95.0 cos 45°i + 95.0 sin j  = 95.0i / √2 + 95.0j / √2  =  85i + 85j

Therefore, displacement vector is 85i + 85j.

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Answer:50mph

Explanation:

Answer:

Explanation:

The different types of radiation are defined by the the amount of energy found in the photons. Radio waves have photons with low energies, microwave photons have a little more energy than radio waves, infrared photons have still more, then visible, ultraviolet, X-rays, and, the most energetic of all, gamma-rays

Answer:

Push with force of 1N

Explanation:

I have explained in the paper.

Goodluck

You must push with 1 newton  on the pencil to make the balloon pop.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the Force. Newton is the SI unit of force.

Applied pressure is = 100  N/cm².

Cross sectional area = 0.01 cm².

The required force = pressure × area

= 100 N/cm² × 0.01 cm²

= 1 Newton.

Hence, you must push with 1 newton  on the pencil to make the balloon pop.

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There are approximately 1.204 x 10²² molecules of propane in 0.88 g of it.

To determine the number of molecules of propane (C₃H₈) in 0.88 g of it, use the concept of molar mass and Avogadro's number.

The molar mass of propane (C₃H₈) can be calculated by summing up the atomic masses of its constituent atoms:

Molar mass of C₃H₈ = (3 × atomic mass of C) + (8 × atomic mass of H)

= (3 × 12.01 g/mol) + (8 × 1.008 g/mol)

= 36.03 g/mol + 8.064 g/mol

= 44.094 g/mol

Now, use the molar mass to convert the given mass of propane to moles:

Moles of propane = Mass of propane / Molar mass of propane

= 0.88 g / 44.094 g/mol

≈ 0.02 mol

Finally, use Avogadro's number (6.022 x 10²³ molecules/mol) to convert moles to the number of molecules:

Number of molecules = Moles of propane × Avogadro's number

= 0.02 mol × (6.022 x 10²³ molecules/mol)

≈ 1.204 x 10²² molecules

Therefore, there are approximately 1.204 x 10²² molecules of propane in 0.88 g of it.

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The horizontal distance that Sam lands from the base of the cliff is 516 meters.

Given data, Mass of Sam = 85 kg Thrust of Skis = 200 N Height of Cliff = 50mAngle of Skis = 10°There is no friction in the path of Sam.According to the question, the initial potential energy of Sam is converted into kinetic energy and then into potential energy again.

So, the potential energy of Sam at the top of the cliff is the kinetic energy at the bottom of the cliff and the horizontal distance is constant.Thus, the formula for finding the horizontal distance travelled by Sam is given as:$$Distance\;=\;\frac{2\,m\,v\,sin(\theta)}{g}$$Where,g = Acceleration due to gravity = 9.81 m/s²V = Velocity of Sam = $$\sqrt{2gh}$$(as there is no energy loss in the path of Sam).m = Mass of Samθ = Angle of SkisThe value of v is given as:$$v\;=\;\sqrt{2gh}$$$$v\;=\;\sqrt{2\times9.81\times50}$$$$v\;=\;\sqrt{981}$$$$v\;=\;31.3\;m/s$$Now, substituting all the values in the given formula, we get$$Distance\;=\;\frac{2\,m\,v\,sin(\theta)}{g}$$$$Distance\;=\;\frac{2\times85\times31.3\times sin(10)}{9.81}$$$$Distance\;=\;516\;m$$Thus, the horizontal distance that Sam lands from the base of the cliff is 516 meters.

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Answer:

2,4,6

Hey I actually saw this answer in the comment section of the incorrect answer to this question and put it up here so people can verify it. Well, hope this helps dude:)

Answer:

2. half-life of several days

4. emission of gamma rays

6. ability to be attached to a compound used by the body

Explanation:

I can confirm this is correct.

Answer:

Resistance = 15 Ohms

Explanation:

Given the following data;

Emf voltage = 18 V

Internal resistance = 3 Ohms

Potential difference = 15V

To find the resistance of the wire;

First of all, we would determine the current flowing through the wire.

Mathematically, the terminal potential difference is given by the formula;

V = E - IR

Where;

V is the terminal potential difference.

E is the electromotive force (emf).

I is the current.

R is the internal resistance.

15 = 18 - I*3

15 = 18 - 3I

3I = 18 - 15

3I = 3

I = 1 Amperes

Next, we find the resistance of the wire;

Voltage = current * resistance

Substituting into the formula, we have;

15 = 1 * resistance

Resistance = 15/1

Resistance = 15 Ohms

Answer:

Evaporation

Explanation:

Evaporation is a surface phenomenon as the molecules of the surface gets sufficient energy to overcome the force of attraction which will help in converting to the vapor phase.

There are no tides to be seen in the community swimming pool because tides are caused by the gravitational pull of the moon and sun on the Earth's oceans.

Tides are primarily caused by the gravitational pull of the moon and sun on the Earth's oceans. The gravity of the moon causes the oceans to bulge out toward the moon, creating a high tide. On the opposite side of the Earth, there is also a high tide due to the centrifugal force created by the Earth's rotation.

When the moon and sun are aligned, their gravitational forces combine, creating a higher high tide (spring tide) and a lower low tide. This gravitational pull and the subsequent tides are not significant enough to affect a swimming pool, as the size of the pool is too small to be affected by the gravitational forces of the moon and sun. Therefore, there are no tides to be seen in a community swimming pool.

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Explanation is in the file

tinyurl.com/wpazsebu

muzi tyo ta truck stop slip on the way home now and wife nepali

To be carbon neutral we need  to offset your remaining emissions, which can be done by making financial contributions to initiatives that reduce atmospheric concentrations of greenhouse gases.

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Answer:

P V = N R T

P1 V1 = P2 V2      assuming N, R, and T remain constant

V1 = (P2 / P1) V2

V1 = (2 kPa / 4 k Pa) 3.5 m3

V1 = 3.5 m^3 / 2 = 1.75 m^3