Answers
Answer:
The differences between a physical change and a chemical change are as follows :
Physical change is a temporary and usually reversible change in which no new substances are formed whereas Chemical change is a permanent and it is usually an irreversible change in which new substances with different properties are formed. In physical change, the chemical composition of the substance remains the same but only the physical properties like state , colour , speed , motion , shape , size etc are changed whereas In chemical change , the physical properties , the chemical properties and the chemical composition of the substances are changed.Physical change is a reversible change as it occurs in forward as well as backward directions whereas chemical change is an irreversible change as it cannot be reversed back from products to reactants.Some of the examples of physical change are glowing of an electric bulb , magnetising an iron nail , preparing a solution , changing of ice into water and water vapour etc. Some of the examples of chemical change are changing milk into curd , rusting of iron , burning magnesium ribbon , decaying grasses , cooking rice etc.Hope I helped!
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Related Questions
When you flip a biased coin the probability of getting a tail is 0.46.
Find the probability of getting a head.
Answers
Answer:
54%
Step-by-step explanation:
Getting a head or a tail are two mutually exclusive events. Thus, given that probability of getting a tail is 0.46, the probability of getting a head is 0.54.
What are mutually exclusive events?Two events are mutually exclusive or disjoint if they cannot both occur at the same time.
P(getting a head) + P(getting a tail) = 1
(Getting a head and getting a tail are mutually exclusive events. This implies that when we toss a coin, we either get a head or a tail.)
P(getting a head) + 0.46 = 1
P(getting a head) = 1 - 0.46 = 0.54
Learn more about mutually exclusive events here
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Find the distance between V (4.4) and X (5.8). Round to the nearest tenth, if necessary. about units
Answers
Answer:
V= 5 X=6
Step-by-step explanation:
Pls Help me. I will mark brainlist.
Answers
Answer:
The second answer
Step-by-step explanation:
Because if you subtract a negative from an equation you get positive (two negatives make a positive)
bbs.
Which statement best compares the two jobs?
O Job A has a lower salary than job B, but the benefits
make job A a more attractive pay package.
O Job B has a lower salary than job A, but the benefits
make job B a more attractive pay package.
O Job A has a higher salary than job B plus benefits that
make job A a more attractive pay package.
O Job B has a higher salary than job A plus benefits that
make job B a more attractive pay package.
Answers
Answer:
B - Job B has a lower salary than job A, but the benefits
make job B a more attractive pay package.
Step-by-step explanation:
Answer: B
Step-by-step explanation:
The folding chair has different settings that change the angles formed by its parts. Suppose m∠2 is 31 and m∠3 is 65. Find m∠1. The diagram is not to scale.
Answers
Answer:
m∠2=31
m∠3=65
m∠1=?
Notice that measure of angle 2,3 and the angle that's next to angle 1 will form a triangle. Let's name the angle next to 1 to be x.
31+65+x = 180
96+x = 180
x = 180-96
x = 84
Now, you can easily find the m∠1.
84+m∠1 = 180 (REASON: Linear pair)
m∠1 = 180-84
m∠1 = 96
A poll conducted the day before the student- body presidential election at a midwestern university showed that 53.9 percent favored Mario, the rest favoring Yin Ling. The margin of error was 4.2 percentage points. Should Yin Ling have conceded the election?
Answers
Answer:
No
Step-by-step explanation:
The confidence interval of the percentage of people that favored Mario = number of votes favoring Mario ± Margin of error
The confidence interval = 53.9% ± 4.2% = (49.7%, 58.1%)
This means that between 49.7% to 58.1% of the people would have voted for Mario.
Hence Yin Ling would not have won the election, since there is a probability that 50% would have voted for Mario
Help me I need it giving brainiest
Answers
Answer:
120
Step-by-step explanation:
there are three sides, they have to equal 360 degrees so 360/3 = 120, you got it right.
I promise u your gonna have a bright future if u help me with this ! and I'll brainlist
Answers
x 0 1 2 3 4
y 5 10 15. 20. 25
b) x 0 1 2 3. 4
y 1. 10. 37. 82. 145
11. A) x = 0
y = 2x + 5
=> y = 2 * 0 + 5
=> y = 0 + 5 = 5
=> y = 5 (First blank)
x = 1
y = 2x + 5
=> y = 2 * 1 + 5
=> y = 2 + 5 = 7
=> y = 7 (Second blank)
x = 2
y = 2x + 5
=> y = 2 * 2 + 5
=> y = 4 + 5
=> y = 9 (Third blank)
x = 3
y = 2x + 5
=> y = 2 * 3 + 5
=> y = 6 + 5
=> y = 11 (Fourth blank)
x = 4
=> y = 2x + 5
=> y = 2 * 4 + 5
=> y = 8 + 5
=> y = 13 (Fifth blank)
11. B) x = 0
=> y =
=> y = 3 * 0 * 0 + 1
=> y = 0 + 1
=> y = 1 (First blank)
x = 1
=> y =
=> y = 3 * 1 * 1 + 1
=> y = 3 + 1
=> y = 4 (Second blank)
x = 2
=> y =
=> y = 3 * 2 * 2 + 1
=> y = 12 + 1
=> y = 13 (Third blank)
x = 3
=> y =
=> y = 3 * 3 * 3 + 1
=> y = 27 + 1
=> y = 28 (Fourth blank)
x = 4
=> y =
=> y = 3 * 4 * 4 + 1
=> y = 48 + 1
=> y = 49 (Fifth blank)
For more info, here's a picture,
If my answer helped, kindly mark me as the Brainliest!!
Thank You!!
the circle shows the radius of 12mm what is the circumference
Answers
Answer:
24π or about 75.4 mm
Step-by-step explanation:
The circumference of a circle is denoted by C = 2πr, where r is the radius.
Here, we see that r = 12, so plugging this in:
C = 2πr
C = 2π * 12 = 24π ≈ 75.4 mm
The answer is thus 24π or about 75.4 mm.
~ an aesthetics lover
Answer:
about 75.36
Step-by-step explanation:
The circumference formula is C=pi times the diameter and the diameter is 24 because it is twice the diameter so 24 times pi.
quadrilateral ADCD Is the image of quadrilateral ABCD UNDER TRANSLATION
Answers
Answer:
Step-by-step explanation:
espera y termino y te ayudo vale que me falta poco vale
Answer:
ABCD-AEFG
Step-by-step explanation:
Can someone help please?
Answers
Answer:
It’s either A or C. However I’m mostly going with C. For C tells us 2 hours and 23 minutes have passed. I hope this helps.
Step-by-step explanation:
Please correct me if I am wrong.
need help!! 40 points !!
The triangles shown below must be congruent.
Answers
Answer:
The question asks if they must be congruent, so the answer is false
Step-by-step explanation:
All the angles are equal
47 = 47
62=62
71=71
The side between the 62 and 71 equals 7 on the left, we are not given the side between the 62 and the 71 on the right so we do not know if the triangles are congruent. We need to have one of the sides be equal for the triangles to be congruent.
The question asks if they must be congruent, so the answer is false
Answer:
FALSE
Step-by-step explanation:
ap3x
HELPPP 16 POINTS. It was estimated that 325 people would attend game night, but 315 people actually attended.
What is the percent error, to the nearest percent, of the estimate? Enter the answer in the box.
Answers
Answer:
3%
Step-by-step explanation: 315/325 as a percent would be 96.92%. After finding that, we would do 100 - 96.92, yielding 3.08, 3.08 to the nearest percent would result in 3%
Answer:
the answer to the nearest percent is 3%
The exact same experiment was conducted 16 times. How many times
should the results have been similar for them to be valid?
A. 8
B. 10
C. 7
D. 16
Answers
What is the price of one cookie?
Answers
Answer:
$3 for one cookie
Step-by-step explanation:
Divide 18 by 6
Jane and Jillian are hiking around a hill and one complete circle is 8 miles long. They start together but hike in opposite directions. Both start to hike at 8:00 AM. Jane's hiking speed is 3 mph and Jillian's hiking speed is 5 mph. How long will it take before they meet? At what time will they meet? In how many hours? What time will they meet at?
Answers
Answer:
It will tale 1 hour before they meet and they will meet agin at 9 :00 AM.
Step-by-step explanation:
Speed of Jane, [tex]v_1=3[/tex] mph
and the speed of Jillian, [tex]v_2= 5[/tex] mph.
Length of one complete circle = 8 miles.
Both are moving in the opposite direction, let the starting point is at O, and met at the point P after time, t, as shown in the figure.
Let the length covered by Jane via path OAP= x miles.
[tex]\Rightarrow x= 3t[/tex] [as distance= speed x time]
[tex]\Rightarrow t=x/3 \cdots(i)[/tex]
The length covered by Jillian via path OBP [tex]= 8-x[/tex] miles
[tex]\Rightarrow 8-x= 5t[/tex] [as distance = speed x time]
[tex]\Rightarrow t=(8-x)/5 \cdots(i)[/tex]
Now from equation (i) and (ii),
[tex]\frac{x}{3} = \frac{8-x}{3}[/tex]
[tex]\Rightarrow 5x=3(8-x)[/tex]
[tex]\Rightarrow 5x+3x=24[/tex]
[tex]\Rightarrow x=3[/tex]
So, the distanc covered by Jane = 3 miles and
the distanc covered by Jillian = 8-3=5 miles
From equation (i), time taken, t = 3/3= 1 hour.
So, it will tale 1 hour before they meet.
As the startion time was 8:00 AM, so the will agin meet at 9 :00 AM.
PLEASE HELP ASAP, WILL MARK BRAINLIEST
Answers
Answer:
[tex] \sqrt{5} < 2.9 \\ = true \\ \\ 4 > \sqrt{23} \\ = false \\ \\ \frac{ \sqrt{30} }{5} < \frac{7}{5} \\ = true[/tex]
Hopes it helps you ☺️☺️Thank you ☺️☺️
What are rational numbers
Answers
Answer:
In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.
Any number that can be written as a fraction with integers is called a rational number . For example, 17 and −34 are rational numbers
Answer:
C. it cannot be a whole number
Step-by-step explanation:
HEY CAN ANYONE PLS ANSWER DIS MATH QUESTION!!!
Answers
Answer:
85% of 19 = 16.15
Step-by-step explanation:
two in 1 more points
Answers
Answer:
Your photo wont show up
Step-by-step explanation:
Answer:
Hello
1. B. 2.35 * 10^11
2. A. 3 * 10^-2
How do you calculate the x-intercept of a line written in Standard Form?
Answers
y=0 , solve for x
x=0 , solve for y
Here is an example: (solving for x)
2x + 3y = 6
2x + 3(0) = 6
2x = 6
2x/2 = 6/2
x = 3
Here is an example: (solving for y)
2x + 3y = 6
2(0) + 3y = 6
3y = 6
3y/3 = 6/3
y = 2
only 1 question!
Please help I’ll mark brainliest!!!
Answers
Answer:
Wouldn’t y be 4 and x be 1?
Answer:
Y = -1X + 5
Step-by-step explanation:
I just solved it, it was a long problem, I don't wanna talk you through it. I think I'm correct.
Hope this helps! Let me know!
Which ordered pair is in the solution set of 2x - 5y ≥ 10?
a.(-2,1)
b.(-5,-2)
c.(0,5)
d.(6,0)
Answers
(3,5)
Step-by-step explanation:
Answer:
5,0
Step-by-step explanation:
Use the website Desmos to help u in this question
Vera ordered a soup, salad, and sandwich to share with her friends. The probabilities of each item being ready first are as follows: \text{P(Soup ready first}) = \dfrac15P(Soup ready first)= 5 1 start text, P, left parenthesis, S, o, u, p, space, r, e, a, d, y, space, f, i, r, s, t, end text, right parenthesis, equals, start fraction, 1, divided by, 5, end fraction \text{P(Salad ready first}) = 0.45P(Salad ready first)=0.45start text, P, left parenthesis, S, a, l, a, d, space, r, e, a, d, y, space, f, i, r, s, t, end text, right parenthesis, equals, 0, point, 45 \text{P(Sandwich ready first}) = 35\%P(Sandwich ready first)=35%
Answers
SOME 1 HELP WITH 11 PLZZZZ
Answers
Answer: Tiffany got 45 questions right! Hope this helped.
Step-by-step explanation:
Your answer should be a polynomial in standard form. ( d^2 +3) (d^2 +2d +1)
Answers
Answer:d^4+2d^3+4d^2+6d+3
Step-by-step explanation:
Photons of red light have a wavelength of approximately $7\times 10^{-7}$ meters. The energy of a photon is inversely proportional to its wavelength. A photon with 2000 times the energy as a photon of red light will have a wavelength that can be written as $a\cdot 10^b$ meters, where $1\le a < 10$. (In other words, in scientific notation.) What is $a+b$ written as a decimal?
Answers
Answer:2.97 ×10 − 19 J
Insect is crawling in a straight line at a speed of 12cm/s how far will the insect travel in 35 seconds
Answers
Answer:
420cm
Step-by-step explanation:
speedxtime=distance
12x35=420
Answer:
Distance = 420cm/s
Step-by-step explanation:
We have been given that Insect is crawling in a straight line at a speed of 12cm/s.
We have the following outcomes from the question.
Speed of insect = 12cm/sSo, We need to find the distance which can be reached out by insect in next 35 Seconds.
We are familiar with distance formula which is given by , Distance = Speed × Time
Distance = Speed × Time
Or, Distance = 12cm/s × 35
Or, Distance = 420 cm/s
Therefore, Insect is crawling in a straight line at a speed of 12cm/s, 420cm/s will the insect travel in 35 seconds.
Equivalent ratio word problems (basic)
Ingredient
Amount
Graham crackers
2
Chocolate squares
8
Marshmallows
3
How many s'mores can Kora make if she has 20 graham crackers?
Repo
Stuck? Watch a video or use a hint.
Answers
the town of sharon hill is a perfect squre with an area of 9 squares miles the length of each side of town measure how long ?
Answers
Answer:
2.25
Step-by-step explanation:
Since its a perfect square and you know the area, all you have to do it divide 9 by 4