OA.

ocean water

OB. oil in water

OC. sand in water

OD. all of these

OA. Ocean water

**Answer:**

OA. ocean water is a solution

**Explanation:**

An apple is dropped from a 260m high building. How long will it take to hit the ground in

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**

Learn more; https://brainly.com/question/20534444

A 1500 kg car traveling at 15m/s to the south collides with a 4500 kg truck that is initially at rest at a stoplight. the car and truck stick together and move together after the collision, what is the final velocity of the two vehicles

**Answer: 3.75 m/s**

**Explanation:**

Here's what you know: The car has mass 1500 kg, and initial velocity 15.0 m/s. The truck has mass 4500 kg and initial velocity 0 m/s. The final mass is 6000 kg (4500 kg plus 1500 kg, because they stick together) and we are looking for the final velocity. Using the formula p = mv, and the concept that p before equals p after, the p of the car plus p of the truck equals the p of them together. So, 1500 x 15 + 4500 x 0 = 6000 x v final. 22500 = 6000 v, and v = 3.75 m/s. The velocity is positive, and the initial velocity of the car was positive, so the two vehicles together are traveling to the south just like the car was initially.

Brainliest ASAP!!

Solve the equation 4(s+5)=60

**Answer:**

s=10

**Explanation:**

4(s+5)=60

4s+20=60

4s=40

s=10

Give jesseocana the brainliest

what is a unit of electrical flow called

**Answer:**

AMPERE - A unit of measure for the flow of current in a circuit. One ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance. The ampere is used to measure electricity much as "gallons per minute" is used to measure water flow.

**Explanation:**

hope it helps

A unit of electrical flow is known as ampere

if two objects are repelled from each other which force most likely caused this?

A. gravitational

B. weak nuclear

C. electromagnetic

D. strong nuclear

C. electromagnetic

**Answer:**

it's C! electromagnetic

**Explanation:**

4. Hijackers are taking over a plane, They tell the pilot to get to Spain as fast as possible. The plane goes from 900

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

TIME REMISE

01:57:34

As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the

box and the floor become warm. During this process, what happens to energy?

O. It is increased.

O It is conserved,

O It is decreased.

O It is created.

**Answer:**

It is conserved

**Explanation:**

B .It's is conserved.

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.

Which information could a student determine from only the chemical formula of a protein

**Answer:**

**the answer is (D) The number of atoms of each element in the protein**

**Explanation:**

**Answer:**

Which information could a student determine from only the chemical formula of a protein

Which information could a student determine from only the chemical formula of a protein

Which information could a student determine from only the chemical formula of a protein

**Explanation:**

Which information could a student determine from only the chemical formula of a protein

Which information could a student determine from only the chemical formula of a protein

Which information could a student determine from only the chemical formula of a protein

In which box could “gas” be placed?

*C. W is not the answer

It is U:move freely,and spread out

is isopropyl alcohol a element compound or mixture

**Answer:**

Isopropyl is an element compound.

**Explanation:**

Which sentence describes Newton's first law?

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,**

https://brainly.com/question/974124

**#SPJ5**

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 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

Learn more here: brainly.com/question/11673503

Which scenario does not describe an example of acceleration?

A car increases its speed while turning to the left.

A car decreases its speed while driving straight ahead.

A car maintains a constant speed while turning to the right.

A car maintains a constant speed while driving straight ahead.

**Answer:**

B is the right answer

**Explanation:**

It is decreasing.

A car maintains a **constant speed** while driving straight ahead.

The **acceleration **of an object is the rate of change of velocity with time. It is measured in meter per second square.

The car undergoes velocity when there is change in direction of the speed.

Thus, the only option that does not describe **acceleration **is a car maintains a **constant speed** while driving straight ahead.

Learn more about **acceleration **here: https://brainly.com/question/14344386

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:**

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.

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

what is one second time ?

**Answer:**

one second is defined au1/86400th the part of a solar day

5. Michael wanted to see what kitchen cleaner worked best for cleaning her counters. He used Lysol, Clorox, Pine-sol, and just water. For each cleaner, he put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel.

Answer:

Michael wanted to see what kitchen cleaner worked best for cleaning his counters. He used Lysol, Clorox, Pine-Sol, and water. For each cleaner, he used 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel. Which of the following would be a constant?

answer choices:

-Lysol

-Cleaning products

-5 milliliters of grape juice

-Cleanest countertop recorded

5 milliliters of grape juice will be constant.

Explanation:

The different cleaning agents have different cleaning capabilities and some will require more of its quantity than others to clean the counter.

Secondly, only the grape juice has a measured amount of 5 milliliters

Look at pic.... 2 examples of radiation and how they are radiation

**Answer:21**

**Explanation:**

pls help asap pls explain. Just before opening her parachute a skydiver having a mass of 50 kg reaches terminal velocity. Calculate the force of air resistance if the buoyant force is 20 N. Be careful! Use the skydiver’s mass to calculate his/her Fg (force of gravity).

**Answer:**

490N

**Explanation:**

Given that,

Mass of a skydiver, m = 50 kg

Buoyant force = 20 N

When the skydiver reaches the terminal velocity, net force on her is equal to 0. So, air drag is equal to the weight of the skydiver.

D = mg

Putting all the values,

D = 50 × 9.8

D = 490 N

So, the force of air resistance is 490 N.

An object with a charge of 1.2 C is located 4.5 m away from a second object that has a charge of 0.36 C. Find the electrical force that the objects exert on each other. Use 8.988×10 N⋅m2/C2 for the value of Coulomb's constant. Give your answer to two decimal places.

**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]

в горизонтальном положении бревно длиной 18 м можно уравновесить на подставке, отстоящей на 3 м от его толстого конца. Если же подставка находится в 6 м от толстого конца, и на тонкий конец сядет рабочий массой 60 кг, то бревно снова будет в равновесии. Определите массу бревна.

Ответ:

90кг

Пояснение:

Найдите эскиз прилагаемой схемы. Масса бревна M размещается на отметке 3 см от толстого конца, а стержень размещается на отметке 6 см от массы бревна.

Согласно принципу момента, сумма момента по часовой стрелке равна сумме момента против часовой стрелки.

Вес корпуса в более тонкой части W = мг

W = 60 × 10 = 600 Н

Момент по часовой стрелке = 600 × 9

CW момент = 5400 Нм

Момент против часовой стрелки = M × 6

Момент ACW = 6M

Уравнять оба момента

6M = 5400

М = 5400/6

М = 900Н

Масса бревна = 900/10

Масса бревна = 90кг

what would a boats velocity be if it would go 15kph and 18 kph?

**Answer:**

It depends

**Explanation:**

what are two different examples of positive exeleration

**Answer:Accelerating your car to get up to speed on a freeway
**

**An airplane accelerating to take off
**

**Accelerating out of the starting blocks at a track meet**

**Explanation:**

why can't you run from momentum ?

Two kids walk through the woods discussing momentum. I mean, who wouldn’t?

Okay, fine. It’s a basic introduction to the concept of momentum.

Okay, fine. It’s a basic introduction to the concept of momentum.

List two objects here on Earth that are sources of radiant energy. How can you tell they emit radiant energy?

They glow and feel hot

what should you do if the exercise schedule you make for yourself is not working out well by midweek

**Answer:**

I will find a solution.

**Explanation:**

i will figure out the problem,then solve it

DO NOTWORKOUT WHAT AM I SUPPOSE TO SAYY

what is the speed of sound in temperature of 56 degrees C?

**Answer:**

**Answer:**

316 meters/second

What is the kinetic Energy of the 80 kg skydiver if he is falling at 60 m/sec?

KE = 1/2 x 80 x 60^2

KE = 144000

KE = 144000

**Answer:**

144000J

**Explanation:**

Ek=1/2mv²

Ek=1/2×80×60²

Ek=144000J

this word contains a greek root meaning "the people"
Dialogue/Incident in a story that propels the action, reveals an aspect of the character, or provokes a decision. The story is the Tell-Tale Heart by Edgar Allan Poe!!
**PLEASE HELP THIS IS DUE TODAY** when the sun's declination is at the highest point, what direction does the sun rise and set?
After lab, all of Darrel's friends looked at his data and laughed and laughed. They told him that he was 30.8% too low in the boiling point he had just recorded. He had recorded a boiling point of 50o C on his data sheet. What is the correct boiling point of the liquid he was working with in lab?
Calculate the pH of a solution containing a caffeine concentration of 455 mg/L . Express your answer to one decimal place.
convert 8/3 to a mixed number
Solve for x. 0 = 2x + 3x + 5
Which two of the following correctly describe what a gene is? A packet of genetic information that can be passed down from one generation to the next A DNA molecule The entire collection of genetic information in a given species A section of DNA that provides instructions for building a specific protein I'm not sure
Which one can be broken down further and element or a compound?
what does they y represent in the equation y=mx+b
Please help ASAP! All questions.
Shen is on the swim team. Each week he swims a total of 5000 meters. How many kilometers does he swim each week?Be sure to include the correct unit in your answer.
Analyze the map below and answer the question that follows.P.S. The map is below this whole question :) (image)The Pacific Ocean is located at number _____ on the map above, while the Atlantic Ocean is located at number _____.A.1 . . . 2B.1 . . . 3C.2 . . . 1D.3 . . . 1Please select the best answer from the choices provided
plz HELP! ASAP for both 9 and 10 plz
How do you make comparisons between an equation and a graph?
A company has total equity of $2,160, net working capital of $240, long-term debt of $1,070, and current liabilities of $4,500. What is the company's net fixed assets?
Regina used nuts and fruits to make a snack mix. The graph below shows the quantities used for each servingWhat do the points on the graph mean in this context? Select all that apply.For every 3 cups of fruit, there is 1 cup of nuts.For every 1 cup of fruit, there are 3 cups of nuts.For every 2 cups of fruit, there are 6 cups of nuts.For every 6 cups of fruit, there are 2 cups of nuts.For every 12 cups of fruit, there are 4 cups of nuts.
which president got stuck stuck in a bathtub?
The majority of pesticides do not have a residual effect (i.e., not persistent; lose chemical activity) in the soil.a) Trueb) False
By the end of Tinas bike ride, she traveled a distance of 40 kilometers. How many miles did Tina ride? (1 mile 1.6 kilometers)help plz brainless you help me