Provided is a diagram showing forces on a box.
Left
Right
40 Newtons
35 Newtons
What is the net force on the box?
SN Leht
O5N Right
75 N Let
O 75 N Right

please hurry i’m taking a test

Answer:The unstable nucleus of radioactive atoms emit radiation. When this occurs, a new atom and element are formed. This process is called radioactive decay. It continues until the forces in the unstable nucleus are balanced.

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 95g

volume = final volume of water - initial volume of water

volume = 63 - 30 = 33 mL

We have

[tex]density = \frac{95}{33} \\ = 2.87878787...[/tex]

We have the final answer as

Hope this helps you

iondine

Explanation:

bromine has 185pm, astatine haa 200, iondine has 140 and lastly fluorine has 147. so iondine has the smallest atomic radius

Answer:

110.21 g/mol

............................

Answer:

110.22 g in 2.75 moles of calcium

Explanation:

to convert moles to grams

moles (g/mol)

2.75 mol Ca (40.08 (atomic weight) g Ca/1 mol Ca)= 110.22

Answer:

The experimental plan is to measure the values of the dependent variable, which is the temperature of the pizza after it is cooled in each of the heat (temperature) environments, which is the dependent variable, for a given equal period of time, which is the control

Explanation:

The given parameters are;

The temperature of the pizza = 400°F

The temperature of the freezer = 0°F

The temperature of the refrigerator = 40°F

The temperature of the countertop = 78°F

Given that the independent variable = The heat to which the hot pizza is subjected

The dependent variable = The temperature to which the pizza cools down

The experiment plan includes;

1) Place the pizza which is at 400°F in each of the different heat environment, which are, the freezer, the fridge, and the counter top, for the same period of time and record the final temperature of the pizza

2) The option that gives the lowest final temperature within the same time frame is the option that will let the pizza cool down fastest.

Answer:

a; increasing fraction

Explanation:

Answer:

1   Ca(OH)2 + 1  (NH4)2SO4   ---> 1 CaSO4 + 2 NH3 + 2 H2O

Explanation:

The photo I attached should make more sense as an explanation.

When balancing equations, the first and most important step is to count the # of each type of element on each side.

In this problem there are 5: Ca, O, H, N, and S.

Once you do that you can begin balancing.

Here is the initial tally for the elements in this problem:

On the left.....

Ca - 1

N - 2

S - 1

O - 6

H - 10

On the right.....

Ca - 1

N - 1

S - 1

O - 5

H - 5

Looking at these values, we can see N, O, and H all need adjusting the right side. You should never start balancing with O or H unless they are the only elements that need adjusting. They usually balance out with the rest of your work or with water in the end.

So given all of that, you should start balancing with N on the right. Giving NH3 a coefficient of 2 will change the number of Nitrogen atoms on the right to 2. Be careful though! It will also change the number of Hydrogen atoms from 5 to 8 (because (2*3) =6 and 6+2 =8).

Let's tally our numbers again.

On the left..... (these should be unchanged)

Ca - 1

N - 2

S - 1

O - 6

H - 10

On the right.....

Ca - 1

N - 2

S - 1

O - 5

H - 8

Okay, now we see only O and H need adjusting on the right. Luckily there is H2O so we can do that without impacting the number of other atoms.

Give H2O a coefficient of 2 and count the number of atoms on the right again.

On the right.....

Ca - 1

N - 2

S - 1

O - 6 (because 4 from CaSO4 plus 2 from 2H2O = 6)

H - 10 (6 from NH3 plus 4 from 2H2O = 10)

Do these numbers match what you have on the the left side of the equation? Yes! It is balanced so you do not need to adjust anymore. Your coefficients in the answer will be 1-1-1-2-2.

Answer:

the answer is C

Explanation:

i know this one, and may YOU PLEASE MARK BRAINLIEST I ONLY NEED ONE MORE CROWN TO MOVE TO THE NEXT RANK

Answer:

93,000,000 miles (8.5 light minutes)

Explanation:

In the northern hemisphere's winter, the earth is slightly closer to the sun than in the southern hemisphere's winter season

Answer

Calculating the mass number for an atom requires that we know the atomic number and the number of protons in the atom’s nucleus. The mass number then gives us the average weight of atoms of a given element. However, as long as the number of protons equals the number of neutrons, the values balance out and we always obtain a whole number for the mass number.

Explanation:

those 3

Answer:

The penny now weighs 0.0025kg

Hope this helps please give me brainliest!

God bless!

Answer:

element

Explanation:

The Answer fam is......... 1.82 × 10^4, Hence It's B)

Answer:

false

Explanation:

the energy causes the bonds to become looser

Answer:

Because heat flows from warmer objects to cooler objects

Explanation:

Answer:

True

Explanation:

Answer:

Waves carry energy from place to place.

Explanation:

Some waves are used for mainly communication and phone signals. They help people get internet in the middle of nowhere if you are near an energy wave.

The outmost free electron which is present in the outer shell is called valency. The number of elements joining together to form the compound also depends on the valency.

Each electron has revolved around the nucleus and that path is considered as orbit. The orbit is as follows:-

The free electrons are usually lie in the outmost shell.

Hence according to the question, the correct option is S and P orbit.

For more information, refer to the link:-

https://brainly.com/question/12271256

Answer:

WATER!!!!!

Explanation:

hope it helps

Answer:

marine biologist

Explanation:

marine biologist

Answer:

marine biologist a scientist who studies creatures that live in ocean water, from bacteria and shellfish to kelp and whales. mean One of several measures of the “average size” of a data set. .organism Any living thing, from elephants and plants to bacteria and other types of single-celled life.

Answer:

15660.712J

Explanation:

Q = m × c × del T

Q(energy) = ?

m (mass) = 98.5g

c = 4.184J

del T = 75-37 = 38 °C

Q = 98.5 × 4.184 × 38

Q = 15660.712 J

Answer:

ceo que3

Explanation:

Answer: E= 4.085 x 10^-19 J ; Wavelength= 4.862 x 10^-7 m

Explanation:

Sorry for the messy work, but I hope this helps.

Remember:

Plancks constant (h)=  6.626x10^-34 Js

Speed of light (c) = 2.998 x 10^8 ms^-1

What I did:

I found the energy first with the given frequency. Don't forget to convert your units to s^-1! They are actually the same, you dont need to do math for that conversion, just a simple Hz to s^-1.

For the wavelength, I multiplied plancks constant (h) and speed of light (c) together. With that number I divided by the energy found which 4.085 x 10^-19J. Also, be sure to cross off the units because it can get very confusing.  

The energy of the photon is 4.08 x 10⁻¹⁹ J

The wavelength of the photon is 2.58 x 10⁻⁶ m

The given parameters;

frequency of the photon, f = 6.165 x 10¹⁴ Hz

The energy of the photon is calculated as;

E = hf

where;

h is Planck's constant = 6.626 x 10⁻³⁴ Js

E = (6.626 x 10⁻³⁴)( 6.165 x 10¹⁴)

E = 4.08 x 10⁻¹⁹ J

The wavelength of the photon is calculated as;

v = fλ

where;

v is the speed of light = 3 x 10⁸ m/s

[tex]\lambda = \frac{v}{f} \\\\\lambda = \frac{3\times 10^8}{1.165\times 10^{14}} \\\\\lambda = 2.58 \times 10^{-6} \ m[/tex]

Learn more here: https://brainly.com/question/15946945

Answer:

A) In aldehydes, the carbon is always joined to at least one hydrogen atom.

Explanation:

Aldehydes and Ketones are organic compounds.

The main difference between them is that aldehydes have the carbon atom attached to at least one hydrogen atom.

In ketones, the carbon is attached to another carbon.

To reiterate, the striking difference between the two families is that in alkanals, a hydrogen atom is directly attached to the carbonyl group while in alkanones, no hydrogen atoms is attached to the carbonyl group but two bulky alkyl groups.

Answer:

The answer is G

Explanation:

this is because of what a element looks like on a periodic table

Answer:

F. 1 and 3

Elements are pure substance

Answer:

The force of attraction between oppositely charged particles is directly proportional to the product of the charges on the two objects (q1 and q2) and inversely proportional to the square of the distance between the objects (r2).

The strength of the bond between the ions of opposite charge in an ionic compound therefore depends on the charges on the ions and the distance between the centers of the ions when they pack to form a crystal.

An estimate of the strength of the bonds in an ionic compound can be obtained by measuring the lattice energy of the compound, which is the energy given off when oppositely charged ions in the gas phase come together to form a solid.

Explanation:

The lattice energies of ionic compounds are relatively large. The lattice energy of NaCl, for example, is 787.3 kJ/mol, which is only slightly less than the energy given off when natural gas burns.

The bond between ions of opposite charge is strongest when the ions are small.

The ionic bond should also become stronger as the charge on the ions becomes larger.

Answer:

The force of attraction between oppositely charged particles is directly proportional to the product of the charges on the two objects (q1 and q2) and inversely proportional to the square of the distance between the objects (r2). The strength of the bond between the ions of the opposite charge in an ionic compound therefore depends on the charges on the ions and the distance between the centers of the ions when they pack to form a crystal. An estimate of the strength of the bonds in an ionic compound can be obtained by measuring the lattice energy of the compound, which is the energy given off when oppositely charged ions in the gas phase come together to form a solid.

Explanation:

Got it right on edge 2020

Answer:

both will be at liquid state. the particles will move rapidly in all directions and will collide with other particles in random motion