hey can anyone help me out in dis pls

Explanation:

This is the Galilean transformation.

V' = V - U   where want to find V' in the primed frame of reference.

The primed frame is moving at speed U = -20 relative to the train.

V = -3 is the speed of the person in the frame of the train.

Then V' = -3 - (-20) = 17 mph relative to the land outside the train.

Answer:

abcbc

Explanation:

Answer:

The molecules will take the heat energy and convert it to mechanical energy and they get "excited" and eventually their bonds will break and they will turn into water vapor.

Answer: Sample Response: The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward. The ice cream floats because the buoyant force is greater than the weight of the ice cream.

Answer:

The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. The ice cream floats because the buoyant force is greater than the weight of the ice cream.

Explanation:

Answer:

Derived units are derived from these 7 base units. Derived units are dependent on the base units and are not independent of each other. ... Mass has SI units of kg, distance is measured in m and t has the SI unit of second. Thus, SI unit of force is kg.

Answer:

Initial velocity = 39.2m/s

Maximum height is 78.4m

Explanation:

Given

[tex]Time, t = 4s[/tex]

Solving (a): Initial Velocity

Using first law of motion:

[tex]v = u + at[/tex]

Where

[tex]v = final\ velocity = 0[/tex]

[tex]u = iniital\ velocity = ??[/tex]

[tex]a = acceleration = -g[/tex] [g represents acceleration due to gravity]

[tex]t = 4[/tex]

Substitute these value in the above formula:

[tex]v = u + at[/tex]

[tex]0 = u - g * 4[/tex]

[tex]0 = u - 9.8 * 4[/tex]

Take g as 9.8m/s²

[tex]0 = u - 39.2[/tex]

[tex]u = 39.2m/s\\[/tex]

Hence, initial velocity = 39.2m/s

Solving (b): Maximum Height

This will be solved using second equation of motion

[tex]s = ut + \frac{1}{2}at^2[/tex]

This becomes

[tex]s = ut - \frac{1}{2}gt^2[/tex]

Substitute values for u, t and g

[tex]s = 39.2 * 4 - \frac{1}{2} * 9.8 * 4^2[/tex]

[tex]s = 156.8 - 78.4[/tex]

[tex]s = 78.4[/tex]

Hence, the maximum height is 78.4m

Answer:

Line of best fit refers to a line through a scatter plot of data points that best expresses the relationship between those points.

Explanation:

Answer:

If they both start at the same height then most likely that means that each has an intical velocity  and a net force sooooo ball A 19.6

Explanation:

Answer: The mass of ball C is greater than the mass of ball A but less than the mass of ball B.

Answer:

Answer: 2.70m/s NE

Explanation:

Just did it.

Answer:

Ductility and Malleability

Explanation:

Answer:

v = 22.5 m/s

Explanation:

The speed of the bucket can be found using the following equation:

[tex] V_{f} = V_{0} + at [/tex]

Where:

[tex]V_{f}[/tex]: is the final speed =?

[tex]V_{0}[/tex]: is the initial speed = 0 (starts from rest)

a: is the acceleration

t: is the time = 2 s

We need to find the acceleration, it can be found as follows:

[tex] F = ma [/tex]

Where:

F: is the force = 45 N

m: is the mass = 4.0 kg

[tex] a = \frac{F}{m} = \frac{45 N}{4.0 kg} = 11.25 m/s^{2} [/tex]

Now, the speed is:

[tex] V_{f} = V_{0} + at = 11.25 m/s^{2}*2 s = 22.5 m/s [/tex]

Therefore, the speed that the bucket will have is 22.5 m/s.

I hope it helps you!

Answer:

The head-to-tail method of adding vectors involves drawing the first vector on a graph and then placing the tail of each subsequent vector at the head of the previous vector. The resultant vector is then drawn from the tail of the first vector to the head of the final vector.

Explanation:

A word-forming element meaning "physical, physically; natural," from Latinized form of Greek physikos "natural, physical, pertaining to nature."

Answer:

all outer planets are large

Explanation:

The sun and the planets compose the solar system. The common factor among all the outer planets is that they are large.

The planets constitute an essential part of the solar system. The sun is at the center of the solar system and is surrounded by the planets.

Now the earth is the third planet in the solar system. The outer planets are the planets that are all far from the sun. The common factor among all the outer planets is that they are large.

Learn more about planets: https://brainly.com/question/14581221

Answer:

Work with the local civic groups to identify and eliminate eyesores, and beautify the local environment

Pick up a piece of litter every day

Keep a litter bag in your car or your recreational vehicle so you dispose of litter properly

Create a trash fishing contest in your waterway to increase awareness about illegal dumping and littering

Write a letter to the editor of your local newspaper asking others to respect public lands and keep them clean

Help your local schools conduct recycling drives and clean-up projects

Create a beautiful green space by planting trees and shrubs in an area in need of improvement.

Ask local businesses to adopt-a-spot and take care of it

Paint and fix up playground equipment

Organize a paint-out with family and friends and create a community paintbrush mural over a wall of illegal graffiti

Recycle your old tires

Report graffiti to your local authorities

Donate your old computer equipment or dispose of it properly

Conduct a recycling drive in your neighborhood or your business

Volunteer to help your employer conduct paper recycling drives at work

Donate gently used clothes to needy organizations and shelters and identify other items that you can reuse

Compost yard and food waste and seek advice if you don’t know how

Find out how pollution in storm drain runoff can impact our aquifers and ecosystems and be passionate about doing your part to reduce litter and solid waste

Ask your local government officials to establish regular community improvement activities and to support and promote volunteer efforts

Help your library establish an environmental corner that offers books and other educational materials about taking care of the Earth

Answer:

Explanation:

it is a vector as it has a magnitude and a direction. If it was a scalar quantity it would just have a magnitude and would be 45 m. Acceleration is an example of a vector quantity

True I guess

because if the force is balanced and there is no net force, the object will not accelerate and the velocity will remain constant...

Not sure

Answer:

Explanation:

All existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago.

Answer:

They vary quite a lot, yet there are some similarities

Explanation:

With Mercury, you have a hot and barren expanse of rock

With Venus, you also have a fairly hot and barren expanse of rock, with a molten core

With Earth, you have a warm/cool variant with water and a full atmosphere

With Mars, you have a colder and barren expanse of valleys and rock, with a rather paste-like ground

With Jupiter, we have our first gas giant, covered in clouds with a thick atmosphere

With Saturn, it is yet another gas giant, with rings of gas and rock and a dense core of metals, such as iron and nickel

With Uranus, it is also rather gas-full with a fair amount of water and methane, which results in its bluish color (an ice giant)

And finally with Neptune, it is the other ice giant, consisting of water, methane, and ammonia

So there are some similarities (gases, water, land formations, etc.) and some differences (rings, temperature, structure, etc.). Our planets are very unique to one another and continue to engage and surprise us.

Answer:

D.visible light, infrared, microwaves

Explanation:

Answer:

visible light, infrared, microwaves

Explanation:

from highest to lowest

Answer:

1 kerosene is the pure substance, salt and water is the mixture substance

Answer:

pure substansubdiamond nd sulphur. mixture:salt nd oil ,oil nd water

Answer:

v = 0.69 m/s

Explanation:

Given that,

A ball is dropped from a height of 52 m.

The ball reaches the ground in 75 seconds

We need to find the average speed of the ball. The ball will travel a distance of 52 m in 75 s. The average speed of the ball is distance divided by time taken. So,

[tex]v=\dfrac{52\ m}{75\ s}\\\\v=0.69\ m/s[/tex]

Hence, the average speed of the ball is 0.69 m/s.

Answer:

With a balance

Explanation:

Such as an electronic balance and a triple beam balance

The tools that one can use for measuring mass are Balance or Scale, Weighing Machine, Triple Beam Balance, etc.

A balance or scale is a frequently used tool for precisely measuring mass. Usually, it consists of a pan or platform where the thing whose mass is being measured is set.

Weighing Machines: Weighing machines are electronic devices that measure mass and are frequently seen in homes and commercial settings.

Mechanical balance with three beams and movable weights, the triple beam balance has three beams.

Digital Kitchen Scale: When baking and cooking, digital kitchen scales are frequently utilised. They offer convenient and quick mass measurements for the constituents, usually presenting the results digitally.

Thus, these are only a few types of mass measurement equipment.

For more details regarding mass measurement, visit:

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Answer: Examples are --- Water and oil , nails and sand  and are called Heterogeneous mixtures ,

Explanation:

A mixture is a combination of  two or more substances without a  chemical reaction which individual  components having retain their properties, We have two types of mixtures

Homogeneous-- Is a mixture, whether solid liquid or gas that contains proportions in such a way that one can hardly identify  each components by looking eg --air, ink etc

Heterogeneous- Is a mixture in which the physical properties of individual components are maintained  eg --- Rice and beans , water and oil, nails and sand.

Answer:

18.9 N or 19 N rounded

Explanation:

m = 0.145 kg

a = 130 m/s^2

F = ma = (0.145 kg)(130 m/s^2) = 18.9 N

Magnitude of the average force

F = 18. 9 N

There are three laws of motion that are  given by  Newton in order to study the Force and Inertia on the objects in motion or rest.

Newton's First Law defines Inertia

The second law gives the definition of Force

Third law states about action reaction pairs on the objects interacting with each other.

According to Newton' s second law of motion we can write equation (1)

[tex]\rm F = ma.....(1) \\\rm Where\; F = Net\; unbalanced\; external\; force\; acting\; on \; the \; system \\\\a = acceleration \; of \; center\; of\; mass\\[/tex]

Now according to the question

we can write

Mass of the baseball = 0.145 kg

Acceleration of the baseball = 130 [tex]m/s^2[/tex]

Magnitude of the average force can be find out by putting in equation (1)

F = ( 0.145 ) ( 130) = 18.85 N [tex]\approx[/tex] 18. 9 N

For more information please refer to  the link below

https://brainly.com/question/19860811

Unit price = (total cost) / (number of units) . . . The unit is 'dollars per shirt'.

Unit price = ($ 300) / (80 shirts)

Unit price = $3.75 / shirt

Answer:

chemical I think

Explanation:

hope this helps

Answer:

its actually mechanical energy

Explanation:

i took my quiz

Answer:

A non-contact force is a force which acts on an object without coming physically in contact with it.

Explanation:

For example:

Gravitational force.

Magnetic force.

Electrostatics.

Nuclear force.

Answer:

Non-contact force are forces that exist(arise) without any form of contact between two objects.

Examples are ;

Explanation:

Answer:

The Western Hemisphere contained significantly higher amounts of shock-fractured quartz. This led Walter and Luis Alvarez to hypothesize that the asteroid impact site was in the Western Hemisphere.

Explanation: