It will be less than 26 °C as water has a relatively higher specific heat than sand is true statement about the final temperature of water.
Define temperature.Temperature is a unit used to represent hotness or coolness on any of a number of scales, including Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
Given,
In an experiment, equal amounts of water and sand were heated under a lamp. The initial and final temperatures of each were recorded. A partial record of the temperature is shown.
Experimental Record
Substance Initial Temperature Final Temperature
Sand 20 °C 26 °C
Water 20 °C
The quantity of heat energy absorbed by one unit of a substance when its temperature rises by one unit is measured as the substance's specific heat.
This allows you to calculate the equation for a substance's specific heat:
Specific heat equals heat / (mass Δ T)
Given that both samples have the same amount (mass) and that all of the heat from the lamp is applied to them, you can assume that the specific heat of the samples will be as follows:
particular heat is equal to constant / ΔT.
Therefore, the two quantities are inversely connected.
Since sand has a lower specific heat than water, the sand on the shore of a beach is warmer during the day. When walking on a sandy beach on a bright day, your feet get scorched since it's hotter than the ocean.
When equal amounts of water and sand are heated as per the experiment's instructions, water will increase in temperature more slowly and, as a result, reach a lower end temperature than sand. This is because water has a higher specific heat than sand. This is the second option; because water has a substantially higher specific heat than water, the end temperature of water is less than 26°C.
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What is the meaning of closure property in mathematics?
The closure property states that any operation performed on the numbers of a set will be closed under that very state.
This means that in any mathematical operation like multiplication, addition, subtraction, or division when performed on two or more numbers of a particular set, the result will belong to that very set.
For example, addition is closed under whole numbers. This means tat the sum of any 2 whole numbers will always be a whole number.
For example, the sum of whole numbers 10 and 20 is 0, a whole number.
Another case is that of subtraction, which is closed under integers.
For example- the difference between integers 30 and 40 is -10, which is an integer.
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will give brainliest!
find the slope of the line that passes through the given two points.
( -3, 3 ) and ( -9 , 5 )
and
find the slope of the line that passes through the given two points.
( 4 , -7 ) and ( 2 , -7 )
Answer:
The slope of the line passing through the points (-3,3) and (5,9) is 3/4
3/2 is the second one
1 ) y = - 1 / 3 x + 2
2 ) y = 0x - 7
To find the slope of the line you can use the equation.
m = y2 - y1 / x2 -x1 = tan(Ф)
Answer:
1 ) y = - 1 / 3 x + 2
2 ) y = 0x - 7
Step-by-step explanation:
To find the slope of the line you can use the equation...
m = y2 - y1 / x2 -x1 = tan(Ф)
Hope this helps! :)
I don't understand this tbh and I have been stuck on it foreverr
The height of the balloon before it started its' descent is; 2660 ft
How to solve function tables?We are given a function table with;
time after descent on x-axis in minutes
Height of descent on the y-axis in feet
Let us calculate the slope with the formula;
Slope = (y₂ - y₁)/(x₂ - x₁)
Picking two coordinates;
Slope = (1960 - 2380)/(5 - 2)
Slope = -420/3
Slope = -140 feet/minutes
Now, the equation of a line in slope intercept form is;
y = mx + c
where;
m is slope
c is y-intercept
when x = 11, y = 1120
Thus;
1120 = -140(11) + c
c = 1120 + (140 * 11)
c = 1120 + 1540
c = 2660 feet
We conclude that it is the height of the balloon before descent
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Two numbers are in the ratio 4: 7. If their L.C.M. is 168, find the numbers.
Two numbers are in the ratio 4: 7. If their L.C.M. is 168,The numbers would be 56 and 98.
The smallest positive integer that is divisible by both a and b is known as the least common multiple (lcm) in mathematics and number theory. It can also be referred to as the lowest common multiple (lcm), or the smallest common multiple of two numbers (a and b).
The given ratio is 4:7, which can be written as 4/7.
To find the individual numbers, we can use the formula:
Number1 = LCM × Ratio1/ (Ratio1 + Ratio2)
Number2 = LCM × Ratio2/ (Ratio1 + Ratio2)
Therefore,
Number1 = 168 × 4/ (4 + 7) = 56
Number2 = 168 × 7/ (4 + 7) = 98
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A circle has a diameter of 4 inches. Which statement about the area and circumference of the circle is true?
A comparison of the area and circumference of the circle is not possible because there is not enough information to find both.
The numerical values of the circumference and area are equal.
The numerical value of the circumference is greater than the numerical value of the area.
The numerical value of the circumference is less than the numerical value of the area.
Answer:
Option B is correct
The numerical values of the circumference and area are equal.
Step-by-step explanation:
Circumference(C) and Area (A)of the circle is given by:
....[1]
......[2]
where, r is the radius of the circle.
As per the statement:
A circle has a diameter of 4 inches.
We know:
Diameter = 2 (radius(r))
then;
4 = 2r
Divide both sides by 2 we have;
r = 2 inches
Substitute these in [1] and [2] we have;
Therefore, the numerical values of the circumference and area are equal i.e 12.56
the salaries of physicians in a certain speciality are approximately normally distributed. if 25 percent of these physicians earn less than $180,000 and 25 percent earn more than $320,000, approximately what fraction earn
Answer:
We know P(x<$180,000)=.25 and P(x>$320,000)=.25
Using the formula for normal distributions, we can find the mean and standard deviation (z = (x-mean)/SD) using the given info. Then you'll have two equations with two unknowns.
Finally when finding part a, make sure to do a continuity correction [P(x<$200,000) = P(x≤$200,000.5) = ?]
Step-by-step explanation:
Which expression is equivalent to (1 + cos(x))2Tangent (StartFraction x Over 2 EndFraction) )?
sin(x)
1 – cos(x)
1 – cos2(x)
(1 + cos(x))(sin(x))
(1 + cos(x)) sin(x) is equivalent to the expression (1 + cos(x))² tan(x/2)
How to find which expression is equivalent to (1 + cos(x))² tan(x/2)?
Trigonometric Identities are the equalities that involve trigonometry functions and holds true for all the values of variables given in the equation
Given: the expression (1 + cos(x))² tan(x/2)
(1 + cos(x))² tan(x/2)
In trigonometric Identity:
Since tan(x/2) = sinx / (1+cosx). We have:
(1 + cos(x))² tan(x/2) = (1 + cos(x))² [sin(x) / (1+cos(x))]
(1 + cos(x))² tan(x/2) = (1 + cos(x)) sin(x)
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Help me please !!!!
Answer:
Step-by-step explanation:
2.) 143 7/23
3.) 291 46/48
4.) 220
5.) 56
6.) 1292 63/4
I NEED HELP FASTT PLS HURRY 20 POINTS
Answer:
D
Step-by-step explanation:
the line isn’t dotted so we take also the points that lies on the line
the shaded part is right the line so we take the points >
the number of hits on the campus ready website follows a poisson process with a rate of 3 per minute. what is the probability that more than a minute foes by without a hit
The probability that more than a minute foes by without a hit is 0.0498.
Let X denote the waiting time in minutes until the next hit.
From the question, we have
The probability density function of exponential distribution is,
f(x)=λe^(-λ*) λ>0
Probability =
P(X>1) =∫_1^∞ 3e^(-3x) dx
=3(e^(-3z)/(-3))_1^∞
=e^(-3)
=0.0498
Probability = 0.0498
Probability:
Possibility is referred to as probability. This branch of mathematics deals with the occurrence of a random event. The value's range is 0 to 1. Probability has been applied into mathematics to predict the likelihood of different events. Probability generally refers to the degree to which something is likely to occur. This fundamental theory of probability, which also applies to the probability distribution, can help you comprehend the possible outcomes for a random experiment. Gonna determine how likely something is to occur, use probability. Many things are hard to predict with 100% certainty. We can only anticipate the possibility of an event occurring using it, or how likely it is.
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Jackie has 4 red blocks and 5 blue blocks that weigh 75 ounces. Sam has 4 red blocks and 4 blue blocks that
weigh 65 ounces. How much does the red block weigh? How much does the blue block weigh? Write a let
statement for each variable below, write a system of equations, then solve the system.
Answer:
(6.25, 10)
Step-by-step explanation:
red = x. blue = y
Jackie: 4x + 5y = 75
Sam: 4x + 4y = 65
Solving by elimination
4x + 5y = 75
4x + 4y = 65
--------------------
(4x + 5y = 75) × -1
-4x - 5y = -75
-4x - 5y = -75
4x + 4y = 65
------------------------
-y = -10
÷-1 ÷-1
--------------
y = 10
4x + 4y = 65
4x + 4(10) = 65
4x + 40 = 65
-40 -40
--------------------
4x = 25
÷4 ÷4
-------------
x = 6.25
(6.25, 10)
Each red block weighs 6.25 ounces.
Each blue block weighs 10 ounces.
I hope this helps!
Find the volume of a right circular cone that has a height of 6.5 cm and a base with a radius of 8.5 cm. Round your answer to the nearest tenth of a cubic centimeter.
The volume of the right circular cone is 122.94754 in³.
What is the right circular cone?
The axis of a right circular cone is the line joining the vertex and the base's center.
In other words, a right angle is formed at the place where the apex of the cone and the center of the circular base meet.
Following is the correct circular cone volume formula:
V=1/3hπr²
Diameter = 8.5 in
Radius = 8.5/2 = 4.25 in
Now calculate the volume as follows:
V = 1/3hπr²
V = 1/3(6.5)π(4.25)²
V = 122.94754 in³
Therefore, the volume of the right circular cone is 122.94754 in³.
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ortwo flocks of birds are 210 miles apart and heading directly toward each other. one flock is flying at a rate of 25 miles per hour. in comparison, the other flock is flying at a rate of 37 miles per hour. in how much time will the two flocks meet?
If one flock is flying at a rate of 25 miles per hour and the other flock is flying at a rate of 37 miles per hour then both the flocks will meet each other after 3.39 hours.
Given, two flocks of birds are 210 miles apart and heading directly toward each other. one flock is flying at a rate of 25 miles per hour.
In comparison, the other flock is flying at a rate of 37 miles per hour.
We have to find in how much time will the two flocks meet.
Let, both take t hours to meet,
now, according to the question
first flock will travel the distance, 25t
and similarly second flock will travel the distance, 37t
so, 25t + 37t = 210
62t = 210
t = 3.39
So, both the flocks will meet each other after 3.39 hours.
Hence, if one flock is flying at a rate of 25 miles per hour and the other flock is flying at a rate of 37 miles per hour then both the flocks will meet each other after 3.39 hours.
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Write an equation of the line that passes through (4, -3) and is
perpendicular to y = - x - 2
Answer:
y=-3x+5
Step-by-step explanation:
As the new line is perpendicular to the original line, the gradient of the new line (m) will be -1 ÷ gradient of original line = -1 ÷ 1/3 =3
I need help thanks for your help…
The perimeter of the given right-angle triangle is 40 cm.
What is Pythagoras's theorem?In a right-angled triangle, the sum of the squares of the smaller two sides of a right-angle triangle is equal to the square of the largest side.
We also know that the perimeter of a triangle is the sum of the lengths of all the sides.
First, we need to figure out the length of the base of the right-angle triangle.
Assuming the base to be 'x'.
∴ 17² = 15² + x².
x² = 17² - 15².
x² = 64.
x = ± 8.
So, The base of the triangle is 8 cm.
∴ The perimeter of the triangle is (17 + 15 + 8) = 40 cm.
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Evaluate 11.5x + 10.9y when x = 6 and y =7
Answer: 145.3
Step-by-step explanation:
the solution for the given expression 11.5x + 10.9y is 145.3
What is an Equations?
Equations are statements in mathematics that have two algebraic expressions on either side of the equals (=) symbol. It demonstrates how the expressions written on the left and right sides are equivalent. Equations can be solved to find the value of a variable that represents an unknown quantity. If there is no "equal to" symbol in a statement, it is not an equation. It will be viewed as a phrase.
11.5x + 10.9y
Here x = 6 and y = 7
11.5*6 + 10.9*7 = 145.3
Hence, the solution the given expression is 145.3
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does anyone know what the sum of y and 4 is but as an expresion
Find the dimensions of a rectangle (in m) with perimeter 60 m whose area is as large as possible. (enter the dimensions as a comma-separated list. ).
The dimension of a rectangle is 15m and 15m.
Here we have to find the area of a rectangle as large as possible.
Data given:
Perimeter = 60m
The formula for the perimeter of the rectangle:
perimeter = 2(length + breadth)
60 = 2( l + b)
l + b = 30
We have to find the largest area, so when we will take the length and
breadth same then we get the largest area.
So length = breadth
2 length = 30
length = 15m
length = breadth = 15m
Therefore the dimensions are 15m and 15m.
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A study indicated that the citizens of Washington wasted 7,470 gallons of water last year. This year, they wasted 30% less. How many gallons did the citizens waste this year?
Answer:
2,241
Step-by-step explanation:
7470 x 0.3
can anyone help please !
Answer:
See pictures below
Step-by-step explanation:
Desmos is a free graphing calculator. Draw the line of the equation and then < will be everything below the line and > will be everything above the line. The portion that is shaded by both colors is the answer.
y = mx + b
The "b" part of the equation tells you the point that the graph crosses the y axis.
The "m" part is the slope. The rise over the run.
(6 + 4 + 11 + 10 ÷ 2)
Answer:
[tex]\frac{31}{2} , 15.5[/tex]
Step-by-step explanation:
As you follow PEMDAS and go from left to right, you will begin with addition and end with division.
It may make it easier to visualize it as such:
( ( (6+4) +11+10) ÷ 2)
Furthermore, this will end up being
(31÷2)
This may be written as a fraction or decimal as either:
[tex]\frac{31}{2}[/tex] or [tex]15.5[/tex]
6 são quantos por cento de 8?
Answer: .48
Step-by-step explanation:
what are the differences between the predicted values and actual values called in a regression analysis?
The difference between the predicted regression value and the actual value is called the residual.
Let's assume a simpler model: Y= β₀+ β₁X + E. For linear regression, let ε∼N(0,σ2). The most important thing here is that ϵ is a normal random variable. This makes Y a normal random variable with mean β0+β1X and variance σ₂.
Regression Analysis:
Regression analysis is a set of statistical techniques used to estimate the relationship between a dependent variable and one or more independent variables. It can be used to assess the strength of relationships between variables and model future relationships between variables.
Assumptions:
One of the main assumptions of regression analysis is that residuals with mean equal to 0 are normally distributed. Residuals must be both positive and negative. If this condition is not met (residuals are only positive or negative, i.e. the model is either consistently Regardless, it means that it has not been properly selected for prediction.
Poor predictions are due to (i) the regression model should contain non-linear terms rather than only linear terms, (ii) multicollinearity of the independent variables, and (iii) missing important predictor variables (features). Poor understanding of the problem and data, (iv) non-constant data variance, or (v) extrapolation (prediction) far beyond the range of the independent variables used to estimate the parameters of the model.
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Line k has an equation of y= 10 3 x+9. Line includes the point ( – 3, – 2) and is parallel to line k. What is the equation of line ?
y = (10/3)x + 8 will be the equation for the parallel line that passes through the point (-3, -2).
What is the equation of a parallel line?Make the line's equation y = MX + c.
The parallel line that is parallel to the line y = MX + c is therefore given the equation as, y = MX + d.
The equation for line k is y=(10/3)x+9.
Line l is parallel to line k and comprises the coordinates (-3, -2).
y = (10/3)x + d
The line's equation is passing across (–3, –2). The parallel line's equation is therefore given as:
–2 = (10/3)(–3) + d
–2 = –10 + d
d = 10 – 2
d = 8
Therefore, y = (10/3)x + 8 will be the equation for the parallel line that passes through the point (-3, -2).
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Complete question:
Line k has an equation of y= 10/3x+9. Line l includes the point ( – 3, – 2) and is parallel to line k. What is the equation of line l?
How do you make a area?
The area is measurement of the surface of a shape. To find the area of a rectangle or a square you need to multiply the length and the width of a rectangle or a square. Area, A, is x times y.
In circle Q, QR = 6 and the area of shaded sector=15. Find the length of RTS.
Express your answer as a fraction times .
S
77
The area of the shaded sector of the circle will be 12π units².
What is the Area of a Sector?Area of a sector of a circle = θ/360 × πr², where r is the radius of the circle and θ is the central angle.
In circle Q, QR = 6 and m∠RQS = 120°.
As per the given question given data:
θ = 120°
r = QR = 6
Substitute the values in the formula to get:
Area of sector of a circle = 120/360 × π(6)²
Area of sector of a circle = 1/3 × π(36)
Area of a sector of a circle = 12π units²
Thus, the area of the shaded sector of the circle is 12π units².
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The question seems to be incomplete the correct question would be:
In circle Q, QR = 6 and m∠RQS = 120°. Find the area of the shaded sector.
Express your answer as a fraction times pi.
A regular polygon is shown. 10 sided regular polygon Determine the measure of one of its angles.
The measure of one of 10 sides regular polygon angles is 144 degrees.
What is regular polygon?
A regular polygon is one that is direct equiangular and equilateral in Euclidean geometry. Regular polygons can be skew, convex, or star-shaped.
If a polygon's sides and angles are equal, it is said to be regular. As a result, an equilateral triangle is a regular triangle, and a regular quadrilateral is a square.
Let the given regular polygon is 10 sides.
Since, sum of all angels of a 'n' sided polygon = (n - 2)180 degrees.
Value of each angle, in a 'n' sided regular polygon = [(n - 2)180]/n.
So, a 10 sided polygon, sum of all the angles
= (10 - 2) × 180
= 1440 degrees.
Value of each angle, in case it is a regular polygon = 1440/10 = 144 degrees.
Hence, the measure of one of 10 sides regular polygon angles is 144 degrees.
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Vickie deposited a $689.78 paycheck, a $200 stock dividend check, a $50 rebate check
and $140 cash into her checking account. Her original account balance was $103.45.
Assuming the checks clear. How much will be in her account after the deposits are
made?
What is a square Class 1?
A square Class 1 is a type of four-sided polygon. It is a regular polygon, meaning that all of its sides have the same length and all of its angles are equal.
There are only right angles in a square. Having the opposing sides parallel defines a square as a quadrilateral. Only one dimension, the side length, may be used to describe a square. Each angle is 90° in length and has an equal number of sides. To help you comprehend the topic better, let's talk more about square angles and work through a few instances. A square Class 1 is a type of four-sided polygon. It is a regular polygon, meaning that all of its sides have equal length and all of its angles are equal. The sides of a square Class 1 are all of the same length, and the angles between them are all 90 degrees. This type of polygon is also known as a regular square.
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How can we use the distributive property to find an expression equivalent to 15(x+2)? place the steps in order.
We can use the distributive property to find an expression equivalent to 15(x+2) as 15x + 30.
The given equation is 15(x+2).
The distributive property can be used on the component outside of the brackets, that is 15.
Therefore, we would multiply 15 by each term inside the rounded brackets.
It becomes, 15 times x = 15x and 15 times 2 = 30
That is, 15*(x+2) = 15* x +15* 2 = 15x + 30
Hence, the equation 15(x+2) becomes 15x + 30.
By using the distributive property, expression equivalent to 15(x+2) is 15x + 30
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