Which of the following objects is in equilibrium?

Answer:

2.45 x 10^-2

Explanation:

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.0245 into scientific notation, follow these steps:

Step 1) Move the decimal 2 times to right in the number so that the resulting number, m = 2.45, is greater than or equal to 1 but less than 10

Step 2) Since we moved the decimal to the right the exponent n is negative

n = -2

Step 3) Write in the scientific notation form m × 10n

= 2.45 × 10-2

Therefore,

2.45 × 10-2 is the scientific notation form of 0.0245 number and 2.45e-2 is the scientific e-notation form for 0.0245

Here are some examples of decimal to scientific notation calculator

Answer:

B

Explanation:

a vector quantity has direction and magnitude

Answer:

Assess what information you are given. Use this method if you know:

the total distance covered by one person or vehicle; and

the total time it took that person or vehicle to cover the distance.

Explanation:

Hope this helps! I might be wrong, so tell me if I am

Answer:

Average speed can be calculated by dividing the total distance the object travels by the total amount of time it takes to travel that distance.

Explanation:

This is as much as I can help you, i don't know much else on how to do that ;w; sorry

Answer:

Neatly wrap the wire around the nail

Explanation:

hope this helps ( not sure tho )

Before connecting the wires used to make an electromagnet, several steps are necessary. The steps are removing insulation from wire ends and cleaning and connecting the prepared wire ends.

First, the insulation surrounding the wire ends must be removed using a blade. Next, the exposed ends should be cleaned with a wire brush or sandpaper to eliminate any dirt or oxidation. Depending on the requirements, the wires can be twisted together for a temporary connection or soldered for a more secure joint. Lastly, the prepared wire ends are connected as needed to complete the circuit.

Therefore, these steps ensure that the wires are properly prepared, allowing for effective current flow and the formation of a functional electromagnet.

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Answer:

0.5kg

Explanation:

Given parameters:

Potential energy = 147J

Height  = 30m

Unknown:

Mass of the bird  = ?

Solution:

Potential energy is the energy due to the position of a body. Now, the expression for finding the potential energy is given as;

      P.E  = mgH

m is the mass

g is the acceleration due to gravity = 9.8m/s²

H is the height

      147  = m x 9.8 x 30

         m = 0.5kg

Answer:

1.5s

Explanation:

Given parameters:

Time taken for the echo to be heard  = 3s

Unknown:

Time taken for signal to reach the ship = ?

Solution:

An echo is phenomenon that originates from wave reflection.

If the travel time of the echo is 3s, the time it takes the echo to reach the ship is half of this time.

 So,

   Time taken to reach the sunken ship = [tex]\frac{3}{2}[/tex]   = 1.5s

Answer:

When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.

Explanation:

this is what we studied

so basically  there is like a surface

and 2 different waves coming out of the same source

they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)

results in showing these colors

Answer:

-5

Explanation:

-15/3

Answer:

Answer: Sound waves and some earthquake waves are longitudinal waves. Ocean, light and other earthquake waves are transverse waves.

Explanation:

There are 2 types of waves:

1. Longitudinal waves: These waves are defined as the waves in which the particles of the medium move in the direction of the wave. This requires a medium to travel. For Example: Sound Waves.

2. Transverse wave: These waves are defined as the waves in which the particles of the medium travel perpendicularly to the direction of the wave. This does not require a medium to travel. These can travel in vacuum also. For Example: Light waves.

Hence, Sound waves and some earthquake waves are longitudinal waves. Ocean, light and other earthquake waves are transverse waves

Answer:

Longitudinal, transverse.

Explanation:

The definitions:

Longitudinal wave: A type of wave that transfers energy parallel to the direction of wave motion.

Transverse wave: A type of wave that transfers energy perpendicular to the direction of wave motion.

Also:

Answer:

what is this???

I don't know these kind of language exist...

Answer:

3.605551275463989

Explanation:

solve using Pythagorean theorem

Answer:

There is a difference in air pressure.

Explanation:

I hope this helps you, BTW I got this right when I did the test

The given point is the separation between hot and cold current as a result of difference in air pressure.

A convection current is a type of heat transfer that occurs from the movement of hot air and cold air due to difference in air pressure.

The upward arrow shows hot air rising up due to its low density.

The downward arrow shows cold moving downwards to replace the risen hot air due to its high density.

Thus, the difference in air pressure between the hot air and cold air is causes convection current.

Learn more about convection current here: https://brainly.com/question/20295382

Answer:

It's C) color

Explanation:

--------

Explanation:

this is too though bro do it by ur self

Answer:

The correct options are A and B

Explanation:

Personal beliefs can be described as beliefs that have not been scientifically proven. These beliefs are generally as a result of religion, culture or tradition. Scientifically in theory, these beliefs lack clear path of possibility. For example, being in possession of certain mineral crystals in order to help protect the body against illness have a little possibility of being scientifically (in theory) explained. There is also no scientific evidence to support this claim.

There is also no scientific evidence to support the idea of the constellation's position to predict  events in a person's life. This also has little possibility of being theoretically explained in science.

It should however be noted that there are exceptions/coincidences that suggest these events happen as it has been listed in the two options.

Answer: A and B!

Explanation: Just took the quiz.

Answer:

A.

Explanation:

I remember this one from my science class.

The molecules in the wood are vibrating faster .

During heating, the temperature of any object or substance increases. This cause the particles to move faster as they gain kinetic energy which leads to an increase in the collision rate as well as diffusion.

Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.

The International System of Units (SI) defines the calorie (cal) as the standard unit of heat. The cal measures the amount of energy transfer needed to raise the temperature of one gram of pure liquid water by one degree Celsius, provided that the water is above the freezing point and below the boiling point.

Therefore, The molecules in the wood are vibrating faster .

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Answer:

Measuring potential difference Potential difference is measured using a device called a . Just like ammeters, some types have a pointer on a dial, but most have a digital display. However, unlike an ammeter, you must connect the voltmeter in parallel to measure the potential difference across a component in a circuit.

Answer:

3.5

Explanation:

The answer should be 3.5

Answer:

3.5

Explanation:

Answer:

its a opinonated question

Explanation:

XD

Answer:

REALLY??

Explanation:

Volleyball was invented in 1905.

Answer: Nitrogen

Explanation: Nitrogen makes up 78% of the atmosphere, Oxygen makes up 21%, and Argon 0.9%.

Water vaper makes up between 1-4%, depending on the region.

Carbon Dioxide makes up only about 0.04%.

Answer: The answer is: Nitrogen

Explanation: I have my ways ;>

Answer:20Ω

Explanation:

Answer: The electrician wrapped the wires with plastic caps because plastic is an insulator.

Explanation: Metals are excellent conductors of electricity, largely because electrons in the metal are only loosely bound by their respective atoms and thus will readily flow under the influence of an external electric field. Plastics are very different. All the electrons in plastics are tightly bound by their respective molecules and it would take a lot of energy to remove them. Consequently, most plastics are insulators that do not conduct electric current (or do so only poorly).

Answer:

True

Explanation:

In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum).

Answer:

the floor is clean and the soap is dirty. lol

Answer:

[tex]h' = \dfrac{5}{7}h[/tex]

Explanation:

To find how far will the smooth side will the marble go in the upper direction, measured vertically from the bottom (leave your answer in terms of h)?

From the given information:

The potential energy for the marble starting at rest is:

PE = m*g*h

In the bottom of the bowl; the marble exhibit a linear and rotational K.E

[tex]K.E_{total} = K.E _{linear} + K.E _{rot}[/tex]

[tex]K.E_{total} = \dfrac{1}{2}mv^2+I\omega^2[/tex]

[tex]K.E_{total} = \dfrac{1}{2}mv^2+ \dfrac{1}{2}( \dfrac{2}{5}mR^2) ( \dfrac{v}{R})^2[/tex]

[tex]K.E_{total} = \dfrac{1}{2}mv^2+ \dfrac{1}{5}mv^2[/tex]

[tex]K.E_{total} = (\dfrac{5+2}{10})mv^2[/tex]

[tex]K.E_{total} = \dfrac{7}{10}mv^2[/tex]

By applying Conservation of energy, The Total Energy occurring in the marble when it started at rest is the same as the total energy when it gets to the midpoint in the bowl.

i.e.

[tex]P.E = K.E_{total}[/tex]

[tex]mgh = \dfrac{7}{10 }mv^2[/tex]

10 × mgh= 7mv²

making v² the subject of the formula, we get:

[tex]v^2 = \dfrac{10}{7 }gh[/tex]

Let us remember that the rotational K.E occurring at the midpoint of the bowl is still unchanged at the time the marble is moving to the left side.

Thus, by applying the Conservation of energy balance:

The linear K.E at the midpoint = The P.E of the marble

∴

[tex]\dfrac{1}{2}mv^2 = mgh'[/tex]

Making h' the subject, we get:

mv² = 2mgh'

Divide both sides by m

v² = 2gh'

Recall that [tex]v^2 = \dfrac{10}{7 }gh[/tex]

[tex]\dfrac{10}{7} gh = 2gh'[/tex]

10 gh = 14 gh'

Divide both sides by 2g

5h = 7h'

[tex]h' = \dfrac{5}{7}h[/tex]

Answer:

0.014s

Explanation:

Given parameters:

Mass of the ball  = 0.058kg

Force  = 260N

Velocity of the ball  = 63m/s

Unknown:

Time of contact  = ?

Solution:

To solve this problem, we apply Newton's second law of motion which is mathematically expressed as;

    Ft  = m(v - u)

F is the force

t is time

m is the mass

v is the final velocity

u is the initial velocity = 0m/s

   Insert the parameters and find t;

      260 x t  = 0.058(63 - 0)

       260t  = 3.65

            t = 0.014s