seconds)?

**Answer:**

7.28 s

**Explanation:**

s=-260

u=0

assume a=-9.81

t=?

s=1/2at^2 + ut

-260=1/2 (-9.81) t^2 +0t

t=7.28 s

The** time taken** for the apple to **hit the ground** from the high building is **7.28s.**

Given the data in the question;

Before the apple was dropped, it was initially at rest, so

Initial velocity; [tex]u = 0 m/s[/tex]Distance or height from which it was dropped from; [tex]s = 260m[/tex]

To find the time it will take for the apple to hit the ground

We use the **Second Equation of Motion:**

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

Where **s **is the **distance **or **height **from which it was dropped, **u **is its **initial velocity**, **t **is **time **and **a **is the **acceleration due **to **gravity.**

We know that earth's gravitational field or acceleration due to gravity; [tex]g = 9.8m/s^2[/tex]

Since the apple is falling, it under gravity; [tex]a = g = 9.8m/s^2[/tex]

We substitute our values into the equation and find** t**

[tex]260m = (0m/s)^2 + (\frac{1}{2} \ *\ 9.8m/s^2\ *\ t^2 )\\\\260m = 4.9m/s^2 \ * \ t^2\\\\t^2 = \frac{260m}{4.9m/s^2}\\\\t^2 = 53.06^2\\\\t = \sqrt{53.06s^2} \\\\t = 7.28s[/tex]

Therefore, the** time taken** for the apple to** hit the ground** from the high building is **7.28s**

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List out Units For: Acceleration

Acceleration units : M/s squared

Unit for Acceleration is m/s² or ms raised to -2

The photo shows dew drops that formed on the grass when temperatures

cooled during the night. Which change of state happened to form the dew?

A. Liquid to gas

B. Gas to liquid

C. Solid to gas

D. Gas to solid

Gas to a liquid

This is because of condensation

This is because of condensation

gas to liquid is the answer

Eclipses occur because the Moon?

A

does not create its own light and only reflects light from the Sun.

o

does not create its own light and only reflects the light from Earth.

o

с

creates its own light, which is blocked by the Sun during an eclipse.

creates its own light, which is blocked by Earth during an eclipse.

I’m just here typing don’t mind me

**Answer:**

с

creates its own light, which is blocked by the Sun during an eclipse.

**Explanation:**

might not be right but its what i remember

Which words help you to determine the meaning of the word decelerate in paragraph 3

**Answer:**

the words

**Explanation:**

**Answer:**

Pressing the brake pedal

**Explanation:**

Decelerate sounds a lot like the word accelerate, but we know that the speed is decreasing, so it would have to be going down, getting slower, so whichever sounds like a good example of speed decreasing should be a good answer!

please help

Which equipment is best to hold and to measure liquids?

A). flask and graduated cylinder

B). scale and ruler

C). caliper and thermometer

D). stopwatch and beaker

**Answer:**

I'm pretty sure that the answer is A

If an object is moving with constant acceleration, its velocity must

a

change by varying amounts depending on its speed.

b

always decrease.

c

be constant also.

d

change by the same amount each second.

change by the same amount each second. i think

which one of the following is a derived Si unit a. Newton, b. Meter, c. Mole, d. Kiogram

**Answer:**

*The SI is founded on seven SI base units for seven base quantities assumed to ... The SI derived units for these derived quantities are obtained from these ... mass density, kilogram per cubic meter, kg/m3 ... amount-of-substance concentration, mole per cubic meter, mol/m3 ... solid angle, steradian (a), sr (c), -, m2·m-2 = 1 (b).*

**Kilogram** is a derived **SI unit **of the following.

Thus, A universal standard for expressing the **magnitudes** or quantities of significant natural events is the** International System of Units. **

The acronym** SI,** which derives from the French term Systèm international stands for the** System of Units**, also known as the metric system. The meter-kilogram-second (MKS) system, an earlier unit of measurement, serves as the foundation for the** SI standard.**

The **SI standard **is promoted and explained by the Bureau international des poids et **mesures** (BIPM). The organization was founded in 1875 and is known as the International** Bureau** of Weights and Measures in English. It is governed by the **International Committee** for Weights and Measures (CIPM).

Thus,** Kilogram** is a derived **SI unit **of the following.

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Define what velocity means.

**Answer:**

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).

What the meaning of centerpiece

**Answer:**

1 : an object occupying a central position especially : an adornment in the center of a table. 2 : one that is of central importance or interest in a larger whole the centerpiece of a political agenda.

**Explanation:**

What is an centerpiece?

Answer is :

It is an ornament or display placed in the middle of a dining table

It’s also a (noun)

Answer is :

It is an ornament or display placed in the middle of a dining table

It’s also a (noun)

If a racer maintained a constant speed, during which sections of the race would the racer's velocity be the same?

Sections 1 and 2

Sections 2 and 3

Sections 2 and 4

Sections 3 and 4

pls help!!

**Answer:**

Sections 3 and 4

**Explanation:**

The correct answer would be **sections 3 and 4**.

*The velocity of an object is the speed of the object in a particular direction. In this case, the speed of the racer is constant irrespective of the distance or the direction. Hence, the sections of the race during which the racer's velocity would be the same would be the sections in which the racer faces the same direction - which is sections 3 and 4.*

Lucy and JoJo need to make 140 cupcakes for the school dance. Lucy made 35 of the cupcakes. JoJo made 42 cupcakes What fraction of the cupcakes do Lucy and JoJo still need to make?

Answer:

9/20

Explanation:

According to this question, Lucy and JoJo need to make 140 cupcakes for the school dance. Lucy made 35 of the cupcakes while JoJo made 42 cupcakes. This means that in total, (42 + 35) cupcakes has been made by both Lucy and JoJo

That is, 77 cupcakes out of 140 has been made. This is 77/140 i.e. 11/20

Since 77/140 cupcakes has been made, Lucy and JoJo still need to make;

140 - 77 = 63 cupcakes to meet up their target for the school dance.

This means that the fraction left is 63/140

63/140 in its lowest term is 9/20

Hence, 9/20 of the cupcakes still need to be made by Lucy and JoJo.

**Explanation: 140 - 35 = 105 - 42 = 63**

**yare yare daze**

I use tusk act 4 main

why are force and velocity different?

**Answer: If you apply force to an object the velocity changes. But it doesn't work the other way around apply velocity and the force (no!) Velocity does not change on an object. A force pushes or pulls on an object, but velocity is simply something an object has I hope this makes sense to you. Hope this helps :) **

**Explanation:**

Which of the following statements about the technique of hypnotic regression is not true?

O Recovered memories are not reliable.

Courts often depend upon recovered memories.

O Memories may be planted by the hypnotist.

The process may create stress for the subject.

**Answer:**

B. is the correct answer just took the topic review.

**Explanation:**

Edge2020. Hope that this helps! Peace and Love

**Courts **often depend upon recovered memories is the **wrong **statement about the **hypnotic** **regression**.

**Hypnotic **regression is a **contentious **method because it can have a number of negative effects on the **subjects** who undergo it. For the beginners, the **memories** recovered through any regression can be doubtful and not trust-worthy. All the **suggestions **or leading questions from the **hypnotist **or other people of witnesses can affect the memory.

The **previous** lives memories will be found by the **hypnotic **technique as a past life **regression**. If they used to remember the past life by this method they have high chance of getting into the **traumas**.

Regression therapy mostly used to identify the cause of your current thoughts and reactions. **Therapists** who is using this techniques to access **subconscious **memories that are guiding your current **behaviour**.

**Regression** therapy is a method of treatment that could approach and focuses on resolving particular **past** events that are thought to be interfering or **relatable** with a person's current mental and emotional well-being.

Hence, **Option B** is the correct answer.

Learn more about **Hypnotic regression,**

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What type of bond is shown in the figure?

**Answer:**

ionic

**Explanation:**

PLEASE HELP THIS IS DUE IN 10 MINUTES- (15 points!)

1st question- what are the weather fronts(use the pic for help)

2nd question- who has better weather— high pressure systems or low pressure systems and how do you know?

(Please add explanation)<3

**Answer: I would say that B would have better weather because those dots on the right are cold fronts and the smooth side without the dots is a warm front. I hope this helps :)**

**Explanation:**

A car travels at a constant speed of 70 km/hr for 15 minutes. The car decreases its speed from 70 to 40 km/hr over the next two minutes and then continues to travel at a constant speed of 40 km/hr for the next 5 minutes Which of the following graphs best represents the car's motion during the given time period?

**Answer:**

A car travels at a constanT

An object moves 120 m in 15 seconds. Calculate

the object's speed.

**Answer:**

8m/s

**Explanation:**

speed= distance/time

s= 120/15

= 8m/s

Determine the average speed of an object that travels 200 miles in 4 hours.

**Answer:**

The average speed is 50 miles per hour

**Explanation:**

Speed is equals to distance divided by time

Then substitute your variables into the equation

Hope this helps

please mark as brainliest

Which of the following are examples of acceleration?

A. A car speeds up after getting on a highway.

B. A car travels at a constant velocity on a highway.

C. A car slows down to exit a highway.

D. A car rounds a sharp curve on an off ramp at a constant speed.

**Answer:**

A, B, and D.

**Explanation:**

I've answered this exact question on a quiz. Hope it's not too late!

**Answer:**

A

C

D

Is the right answers not A.B,D.

trust

In a certain semiconducting material the charge carriers each have a charge of 1.6 x 10-19

C. How many are entering the semiconductor per second when the current is 2.0 nA?

**Answer:**

1124923453 electrons

**Explanation:**

The formula for charge in coulomb ,C =Current in amperes, A * Time in seconds, s

Given in question ;

Charge = 1.6 * 10⁻¹⁹ C

Current = 2.0 nA = 2*e⁻⁹ A

Calculate time in seconds as

1.6 * 10⁻¹⁹ = 2*e⁻⁹ * t

1.6 * 10⁻¹⁹ /2*e⁻⁹ = t

6.48e⁻¹⁶ s = t

So using t=6.48e⁻¹⁶ s and current =2*e⁻⁹ A , the charge will be;

C = 2*e⁻⁹ * 6.48e⁻¹⁶ =1.799e⁻¹⁰ C

But 1 coulomb = 6.25 x 10¹⁸ electrons

so 1.799e⁻¹⁰ C = ?,,,,{ 6.25 x 10¹⁸} *{1.799e⁻¹⁰} = 1124923453.06 electrons

When performing a standard push-up, our hands should be placed on the ground... as close together as possible to make it the most challenging as close together as possible to make it the most challenging really wide to focus on chest development really wide to focus on chest development just outside our shoulders

Answer:

Kindly check the explanation section.

Explanation:

The statement given in the question or problem above is true or let's say it is correct. And the statement describes different kinds or types of push up.

Push up is a kind of excercise that is being done mainly to strengthen the arm and the cheat. The way one goes about it determines which part of the body one is strengthening.

The kind of push up in which one has to close up the gap between his or hands is known as the close push ups. This kind of push up strengthens the arm more than the other part of the body and the more one puts his or her hands closer the more problematic the push up excercise becomes.

Other types or kinds of push ups are the Slow Eccentric Push Ups, Wide Push Ups, Staggered Push Ups, T push ups, Fingertip Push Ups and many more.

How does changing the number of neutrons affect an atom?

**Answer:**

If you change the number of neutrons in an atom, you get an isotope of the same element. The addition of a neutron can make an atom radioactive. When you change the number of protons in an atom, you will change the atom from one element to a different element.

**Explanation:**

The characteristics of the **atomic nucleus** allow to find the answer for the effect of the **change** of **neutrons** in an atoms is

The change in neutrons changes the

A **chemical element** is made up of **protons**, **neutrons** and **electrons**; the first two are in the **atomic nucleus** and the **electrons** are in **orbits** around them.

The number of **protons** corresponds to the **atomic number **and its change changes the type of element.

The **neutrons** that are **neutral charge **together with** protons** form the **mass **of the atom, as neutrons are neutral if the number does not affect the type of atom, but if its** atomic mass** changes.

Elements with the** same atomic number**, but **different atomic mass**, different number of neutrons are called **isotopes**; in general **all elements** **have isotopes**, for example hydrogen has an isotope called deuterium that has a neutral and another radioactive isotope called tritium that has two neutrons.

In conclusion using the** characteristics **of the **atomic nucleus** we find the answer for the effect of the **change** of **neutrons** in an atoms is

The change in neutrons

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If a train goes at constant speed of 40 miles per hour for one hour, then at constant

speed of 55 miles per hour for two hours, what is its average speed at the train?

**Answer: because the train goes 72 mph for 2 hours**

**Explanation:**

does the train go 72mph for 2 hours as well? if so the answer would be 324 because you have to add 90 twice scene it goes at that speed for 2 hours thats 180. assuming the train goes 72 mph for 2 hours it would be 144. then add 180 and 144 and you get 324 merry christmas and a happy newyear to you and your family

A. Forces always come in pairs that have the same magnitude.

B. The action force applied by one object to another is opposite in

direction to the reaction force.

C. It takes a larger net force to accelerate an object at a greater rate.

D. Unbalanced forces cause an object to move.

SM

[tex]\Large{\red{\bf{\blue{\dag} Answer:-}}}[/tex]

**Newton's First Law of Motion **:

An object stays in rest or in uniform motion unless and until compelled by an external unbalanced force . This is also known as " Law of Inertia " .

Here this statement is best represented by the statement : *Unbalanced forces cause an object to move.** ***[**** ****option**** ****c**** ****]**

**More**** to**** know**** ****:****-**

Newton's 3 laws of motion :-

**Newton's**** ****First**** Law**** of**** Motion**** ****:****-**

It states that an object stays in rest or in uniform motion unless and until compelled by an external unbalanced force . This is also known as " Law of Inertia " .

**Ex**** ****-**** ** (i) We tend to fall backwards while standing in the bus , when it starts suddenly.

(ii) We tend to fall forward while standing in the bus , when it stops suddenly.

**Newton's ****Seco****nd**** Law of Motion :-**

It states that the rate of change of momentum is directly proportional to the applied force in the direction of the force . That is ∆p [tex]\propto[/tex] Force .

**Ex**** ****-**** **(i) When we push car & a truck with same force the car will have Greater acceleration due to less mass . (Imaginary case ).

(ii) We feel easy to push a empty cart than a full cart .

**Newton's ****Third**** Law of Motion :-**

It states that every action has equal and opposite reaction .

**Ex**** ****-**** **(i) We are able to walk on ground due to Newton's third law of motion .

(ii) When we push wall it also applies equal and opposite force .

"**Unbalanced **forces cause an **object **to move " is the sentence that describes **Newton's first law.**

A **body **remains in the state of **rest **or uniform **motion **in a **straight **line unless and until an **external **force acts on it.

The **object **is to be rest if the **velocity **and **acceleration **are zero. When an object is in **motion**, **velocity **is **not **equal to **zero **(v ≠ 0) but **acceleration **(a = 0) is equal to **zero**. Therefore, the **object **will continue in motion with **constant **velocity in the **same **direction.

Example:

If we **jump **from a bus while **moving**, our body will be like still moving in the same **direction **of the vehicle. When your feet hit the ground, the **grounds **act on your feet and stop moving. You will fall because the upper part of your body didn't stop and you will **fall **in the **direction **you were moving.

If the **object **have the greater **mass**, then the object will have more **inertia**. Forces can change the **object's **motion.

Hence, **Option D **is the correct answer.

Learn more about **Newton's first law,**

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They glow and feel hot

km/hr (beginning speed) to 1140 km/hr (final speed) in just 6 seconds. What is the acceleration of the plane?

The acceleration is about 1457, because of the wind turbines and the way it’s going

A. gravitational

B. weak nuclear

C. electromagnetic

D. strong nuclear

C. electromagnetic

**Answer:**

it's C! electromagnetic

**Explanation:**

**Answer:**

[tex]1.917*10^8\ N[/tex]

**Explanation:**

Coulomb's law states that the electric force between two charges is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them. It is given by the formula:

[tex]F=k\frac{q_1q_2}{r^2}\\ \\q_1=first\ charge = 1.2C,q_2=second\ charge=0.36C,k=coulomb\ constant=8.988*10^9 N.m^2/C^2, r=distance=4.5m,F=force\\\\F=8.988*10^9*\frac{1.2*0.36}{4.5^2} =1.917*10^8\ N[/tex]

why is a 5 rupees coin attracted by a magnet? name the metal present in the coin

Hey Mate

See a coin is attracted bcoz he it has a metal names iron Which is easily attracted by the magnets

Hope, you fell my answer Helpful ( ◜‿◝ )♡

The new metal in the coin is Ferritic Stainless Steel

The (old) metal in the coin is Cupro-Nickel

The (old) metal in the coin is Cupro-Nickel

how is kinetic energy is stored

Answer:

Explanation:

Kinetic energy can be stored. For example, it takes work to lift a weight and place it on a shelf or to compress a spring. ... Kinetic energy can also be transferred from one body to another in a collision, which can be elastic or inelastic. One example of an elastic collision would be one billiard ball striking another.

**Explanation:**

In a group of 80 people, 50 can speak Nepali, 45 can speak English and 7 of them do notspeak both languages.a) Find the number of people who speak both languages.b) Also illustrate the above information in Venn diagram.
yall tryna help me :/
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