# Posts by Jared

Total # Posts: 361

**Physics**

How many x-ray photons are emitted per second by an x-ray tube that puts out 1.0 W of 75-KeV x rays?

**Physics**

How many x-ray photons are emitted per second by an x-ray tube that puts out 1.0 W of 75-KeV x rays?

**Physics**

A certain material has a work function 0 (angle sign) = 1.5 eV. a)what is the frequency of a photon that ejects an electron from his material, giving the electron an energy of 1.6 eV? b)what type of EM radiation is this?

**Physics**

A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

**Physics**

A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

**Physics**

How many calories are needed to heat 247 grams of ice at 14F to water at 50C? s(ice)=0.500kcal/kg/C, s(water)=1.000kcal/kg/C ,hf= 79.7kcal/kg, hv= 540 kcal/kg

**Physics**

A train blows its horn as it approaches a crossing. A.) if the train engineer observes a frequency of 125Hz and a stationary observer at the crossing observes a frequency of 132Hz, what is the speed of the train? (The speed of sound is 330m/sec on this day). B.) what frequency...

**Physics**

Ten cars at an intersection are blowing their horns simultaneously, creating a 100 decibel sound in the middle of the intersection. What is the average sound level for each car? 10/100= 10db per car?? Idk

**physics**

A soccer ball has a diameter of about 22 cm and a mass of about 430 g. What is its terminal velocity?

**4th grade math**

1. After saving up for while, Melanie saved $12 of her allowance. She decided to spend 1/3 of that money at the book fair. the book she wanted was $5. Did she bring enough money to buy the $5 book. Draw a model to justify your answer. Answer - 12 x 1/3 = 12/3 =4. So she doesn...

**4th grade math**

Eric had 10 cookies. He gave 1/2 to Jeff. he also gave 1/5 of cookies to Mike. How many cookies does each boy have? Jeff: 10 x 1/2 = 5 Mike: 10 * 1/5 = 2 Eric = 10-(5+2)= 3

**math**

A 4-pound box of rice, which is a mixture of white rice and wild rice, sells for $1.80 per pound. White rice sells for $0.75 per pound. Wild rice sells for $2.25 per pound. How many pounds of white rice are in the mixture? -White rice = W Wild ride= S S+W=1.80 0.75w+2.25s=7.2 ...

**4th grade math**

Can you check please. 1. Melvin had 20 children in his kindergarten class. Two-fifths of the children had brown eyes. Onefourth of the children had blue eyes. The rest had hazel eyes. How many children had hazel eyes? 20(2/5) = 8 brown 20(1/4) = 5 blue 8+5=13. So 21-13 = 7 hazel

**math**

Jared is scheduled to work for mc008-1.jpg of an hour at the school fair. He has already worked mc008-2.jpg of an hour. How much longer does he have to work?

**physics**

I don't Know the answer!

**physics**

When I was traveling at 18m/s with my bike I approach traffic lights when I was 30m far from them they turned red and it took me to recognize and react by applying breaks then I decelerated to 4.6m/s2. How will I go and in which side of the traffic lights?

**Math**

Currently, you have $80 and your sister has $145. You decide to save $6 of your allowance each week, while your sister decides to spend her whole allowance plus $7 each week. How long will it be before you have as much money as your sister?

**Linear Programming - The Graphical Method**

A farmer is going to divide her 60 acre farm between two crops. Seed for crop A costs $20 per acre. Seed for crop B costs $10 per acre. The farmer can spend at most $700 on seed. If crop B brings in a profit of $60 per acre, and crop A brings in a profit of $180 per acre, how...

**ST**

linear programming programming by graphing and then determining which vertex minimizes the objective function G=4x+3y . {5x+15y?15 {5x+5y?35 {x?0 {y?0 x = y = What is the minimum value? G=

**maths**

The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

**maths**

Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(1,-5), B(6,10); (b) A(4,-3), B(7,6).

**Maths**

The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

**Physics**

A car of mass accelerates from rest to a speed in time with negligible friction and air resistance. What is an expression for the average power delivered by the car's engine? a) Mv22t b) Mv2t c) Mvt D) Mv2t

**Physics**

Keisha throws a baseball with an initial velocity of 30 m/s at 30.0° above the horizontal. If air resistance is negligible, how long does it take for the baseball to reach the maximum height of its trajectory? Assume that the acceleration due to gravity is given by: g = 10...

**Physics**

A person takes a trip, driving with a constant speed of 94.0 km/h except for a 22.0 min rest stop. If the person's average speed is 60.1 km/h, how much time is spent on the trip and how far does the person travel?

**3rd grade math**

Mr. king,ms. Lee,and mr. Patel own pizza shop together. They estimatedd the number of customers over the past 10years. Mr.King estimated they served 15,000 customers. Ms.Lee estimated 15,500 customers. Mr.Patel estimated 20,000 customers. Which actual number of customers below...

**Physics**

A diverging lens has a focal length of 17.3 cm. An object 1.08 cm in height is placed 184 cm in front of the lens. Locate the position of the image. Answer in units of cm.

**Science**

Thank you Ms.Sue

**Science**

50 meters per.second

**Science**

It says a man walked 2.5 kilometers in 50 seconds how fast did he go in meters per second (hint 1km=1000m) Ms. Sue I am so confused

**Science**

2.5 kilometers it says ms.sue

**Science**

A man walked 2.5 km in 50 seconds how fast did he go in meters per second?

**Math**

Because I could not find it reiny!!!!

**Math**

If the width of a window is (x+7) inches and the length is (x+9) inches, then give the expression which represents the area of the window use the formula area=base.Height. if ×=8 inches, find the area of the window using the expression you found in part a

**Word problem**

If the width of a window is (x+7) inches and the length of the window is (x+9) inches, give the expression which represents the area of the window. Use the formula area=base.height. If x=8 inches, find the area of the window using the expression you found in part a.

**Science**

330

**College Algebra**

what is the equation involving sine that models a periodic function with an amplitude of 2, a period of 2ð/3, and a horizontal shift of 3.5 units?

**Biology**

Treehoppers have either purple, or green, or white skin. Other geneticists have determined that: (1) whenever one white treehopper is mated with another white treehopper all the progeny are white. (2) whenever two pure bred purple treehoppers are mated all their progeny are ...

**Calculus**

4

**Math**

Okay sorry about that... Keep pushing shortcut key lol. Ok so it would be 150+x=300 -150 x=150

**Math**

150+x=300

**Math**

The answer is B. 150+150=300, if you wanted to show your work it would be as follows 150+x=300

**Math**

7/28=0.25*100=25%

**physics**

The membrane that surrounds a certain type of living cell has a surface area of 4.50 × 10-9 m2 and a thickness of 1.00 × 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.3. The potential on the outer ...

**physics**

Starting from rest, a 10kg suitcase slides down a 3.00m long ramp inclined at 30 degrees from the floor. The coefficient of friction between the suitcase and the ramp is 0.35. 1) what net force is applied to the suitcase while it is on the ramp? 2)what is the change in the ...

**physics**

.165

**Math - 3rd grade**

thanks!

**Math - 3rd grade**

Mr. Thomas travel 20miles each week to and from work. If he works 5 days a week, how many miles does Mr. Thomas travel each day to go to work? Does this mean 20miles total for the week or that it should be 40miles total(20 miles to + 20 miles from)? 20miles/5days = 4 miles/day...

**Physical Science**

Did this yesterday. With 270 kPa being half of 540 kPa I got an answer of two and the teacher marked it correct

**Math**

24,87.67+ ? into the nearest dollar

**3rd grade math**

thanks!

**3rd grade math**

1. What is 47 and 52 rounded to nearest hundred? answer: both 0?

**3rd grade math**

thank You.

**3rd grade math**

What is the value of the underlined digit? $2.29 (9 is the underlned digit). My teacher said it's not the ones place. How do i figure it out?

**physics**

three 80 gram weights are suspended at 32 cm 43 cm and 76 cm of a uniform meter stick. if the stick is made to rotate at its midpoint where must the 4th 80 gram weight be suspended to attain equilibrium? please and thank you

**physics**

Guys help with my physics please!!! Four 40-gram weights are suspended at the 13-cm 21-cm 35-cm and 74-cm marks of a uniform meter stick.if the stick is supported at the mid point what load must be suspended at the 82 cm mark to attain equilibrium please explain to me how

**Statics**

If both the projection Pa and component Fb of the force F are 250 N, determine the magnitude of the resultant F and the orientation theta of the b-axis. There is a 34 degree angle from the resultant force to the a-axis. There is a 4 degree angle from the resultant force to the...

**Pre Calculas**

A man who can row in still water at 3 mph heads directly across a river flowing at 7 mph. At what speed does he drift downstream?

**Chemistry**

Copper has a specific heat of 0.387 J/g·°C. How much energy is required to raise the temperature of 460. g of copper from 34.5°C to 232.0°C?

**Math problems**

a farmer plants .6 0f a field with peanuts. the field is 5.6 acres in size. how many acres are planted with peanuts

**Civics**

@Ms. Sue is it A?

**Math**

A cake recipe requires 2 cups of milk.How many batches can be made using 2 gallons?

**Geometry**

I have four questions: 1. The area of trapezoid ABCD is 60. One base is 4 units longer than the other, and the height of the trapezoid is 5. Find the length of the median of the trapezoid. 2. In trapezoid ABCD, line BC is parallel to line AD, angle ABD = 105 degrees, angle A...

**Chemistry**

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE SOMEONE HELP ME WITH...

**Chemistry**

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE SOMEONE HELP ME WITH...

**la**

At the end of her aunt's story in “The Story-Teller," the older girl asks whether the girl in the story would have been rescued even if she had not been good. what does she seem to think is the theme of her aunts story? what detail in the aunt's story leads ...

**physics**

A uniform rod is set up so that it can rotate about a perpendicular axis at one of its ends. The length and mass of the rod are 0.849 m and 1.17 kg. What constant-magnitude force acting at the other end of the rod perpendicularly both to the rod and to the axis will accelerate...

**science**

How are Newton’s second and third laws of motion important to your everyday life?

**la**

a

**la**

While Cyril is smacking the seat cushions, his aunt invites him to look out the window. What can you infer from these two details in "The Story-Teller"? The aunt is trying to distract Cyril and get him to behave. The aunt is punishing Cyril for his bad behavior. The ...

**la**

i was wondering do you have any ideas on how to start writing my answer

**la**

At the end of "Raymond's Run," Squeaky has a different attitude about running and about her rival, Gretchen. Describe the actions that demonstrate these changed feelings. What role does conflict play in Squeaky's changed attitude? Use events and details from ...

**sj hig**

-53.9-(19.4)

**ECT**

ECT = Electronic Control Tech aka robotics So i need to make a project and i don't know what to make - not really homework but still please help me out.

**math**

I'm not even in this class. Lol.

**Science**

thanks

**Science**

a

**Sociology**

Thank you very much

**Sociology**

If Andrea's parents have her take violin lessons, take a foreign language and attend science camp in hopes of her developing skills so she can get into a competitive college, is that an example of human capital or cultural capital? I was leaning towards human capital but ...

**Algebra - Help!**

Given the function: f(x)=(x^2+6x+5)/(x^2+3x−10) Find the Domain: Vertical asymptote(s): Hole(s): Horizontal asymptote (if exists):

**Quadratic Functions in Algebra**

Suppose C(x)=x^2−6x+20 represents the costs, in hundreds, to produce x thousand pens. How many pens should be produced to minimize the cost? What is the minimum cost? Number of pens to minimize cost: Minimum Cost:

**Physics**

A .75kg block is going at a velocity of 1.5m/s and moves on a frictionless surface. Then all of a sudden, the block hits a rough patch. The rough patch is .5m long and has a coefficient of friction of .25. Then it slides onto the frictionless surface again. The mass then ...

**math**

solve the following r/15 >-3 a r>-45 b r>-15 c r > 12 r > 45

**math**

Solve the inequality.- **C + 6 < –20** (A.) c < –26 (B.) c < –14 (C.) c < 26 (D.) c < 14 **D/13≥ –3** (A.) d ≥ –16 (B.) d ≥ 39 (C.) d ≥ 10 (D.) d ≥ –39 **–3p > –48** (A.) p < 16 (B.) p &...

**math**

The cost of refreshments (in dollars) is a function, h, of the number of people served, n. If h(n)=100/9n, find the number of dollars it would cost for refreshments for 27 people.

**Phsycis/Math (please help)**

Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The inclined plane is inclined at an angle of 37 degrees. The hanging block has a mass of 16.0 kg, ...

**Math**

How many integer palindromes are between 10,000 and 70,000 and how many of those are even?

**Math Word Problem**

During the summer throughout high school and for a year after, Lewis worked as a lifeguard at the beach. In that 5-year period, he saw a total of 461 dolphins swimming in the distance. About how many did Lewis spot per summer in the 5 summers he worked?

**algebra**

find the root i know this answer should be 4 but how do i arrive there can someone show me how to do this please X+16/x=8

**Math Exponents**

A closet has a volume of 5^3 cubic feet. Which of the following is equal to 5^3? A.)15 B.)25 C.)125 D.)243

**MATH - URGENT!!!**

Were you able to get an answer? I got 76, but I know it is wrong.... I just can't find anymore.

**MATH - URGENT!!!**

Were you able to get an answer? I got 7, but I know it is wrong.... I just can't find anymore.

**Math Explanation**

Explain what 4 raised to the fourth power means.

**Math Word Problem**

The Mesozoic Era began about 250,000,000 years ago. The Palezoic Era began 292,000,000 years before that. How long ago did the Palezoic Era Begin? A. 42,000,000 Years B. 492,000,000 Years C. 542,000,000 Years D. 556,000,000 Years

**Math Word Problem**

Stefany ran 2 miles each day for 14 days. How many miles did she run in 14 days? Explain two different ways to solve this problen, and then solve

**us history**

1-Name the first president to die in the office (while president) my answer is William Henry Harrison do you agree ?

**us history**

1-which president was a bachelor,he never married in his life -James Buchanan 2-which state of the U.S was its own country can you help me

**us history**

my answer is William Henry Harrison do you agree ?

**us history**

I am not sure if William Henry Harrison was the first president to die in office (while president)

**us history**

Name the first president to die in office (while president). help?