# Posts by alyssa

Total # Posts: 890

**physics**

A 35,000 kg locomotive is moving at a velocity of 11 m/s east. What is the magnitude of the locomotive's momentum?

**Math**

Jeremy and Cynthia leave at the same time to travel 75 miles to an area. Jeremy drives 15 miles in 12 minutes. Cynthia drives 26 minutes in 20 minutes. If they continue at the same rates, who will arrive at the area first?

**8th grade math**

In the original design for the livingroom genivie ve planned to have a 6ft by 8ft floor rug made after looking at the budget however she discovers she only had enough money to make a .75 times the size of the original how much fringe must she purchase to outline the new rug.

**social studies**

what nation is home to the gonges and indus river

**World Geography**

For good crops, Syrian farmers are still largely dependent on what?

**Geometry**

A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

**Geometry**

A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

**Physics**

So just for the record, the answer for A is right. For B, when calculating the resistance R, I messed up in regards to the radii. For the length i needed to use r=.034m and for the area r=4.5e-4m. What a silly mistake. Cheers! and thanks for responding! :)

**Physics**

I don't understand what you just did for A. I used emf=change in flux/change in time flux = magnetic field*area according to my book, the answer for A is right. Please explain!

**Physics**

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the coil during this ...

**physical science**

0.014 grams

**Chemistry**

What is the final temperature after a 11.9 g piece of ice is placed into a Styrofoam cup containing 110 g of hot water at 73.3 degrees Celsius?

**math**

Charles mixed pineapple juice and orange juice to make a fruit punch. He made a total of 5 1/2 cups of the mixture and used 2 more cups of orange juice than pineapple juice. How much did he use of each type of juice?

**Chemistry**

Part A answer was number two and Part B was number one

**math average!**

My average is a 74 right now. My grades are 70( which counts as 60% as my grade and i have 2 more major test coming up) 94, 60 (which counts as 25% and i have about 5 more of this coming up) 90,100,83,91,71( i have about 3 more of these and they count as 15%) This was an ...

**math**

I have a 76 average right now, what grades do I need to get if i have 5 more tests and need to get an 85 average?

**Algebra**

No. U would do 99 times 80%. So that means it would be 99 times .80 which equals 79.20. Then, you would subtract 79.20 from 99 and your answer would be 19.80 as the original price

**Math**

Gina cut a piece of ribbon into 3 equal pieces. Then she cut off 2 inches off one piece to make it 3 inches. How long was the original piece of ribbon?

**Algebra**

LCD of x/x2+3x , 2x/x2-3x

**Physics**

Vf=Vi+at Vf=20 m/s+ 7m/s^2*3s Vf=41 m/s

**Physics**

Three point charges are on the x axis: −6 µC at −3 m, 7 µC at the origin, and −5 µC at 3 m. Find the force on the ﬁrst charge. The value of the Coulomb constant is 8.98755 × 10^9 N · m^2/C^2.

**physics**

A point charge of +1 µC is located at x = −2 cm and a second point charge of −8 µC is located at x = 6 cm. Where should a third charge of +1 µC be placed so that the electric ﬁeld at x = 0 cm is zero?

**social studies**

General Grant's army came closest to defeat in the West as a result of a surprise Confederate attack at the Battle of A. Fort Henry. B. Shiloh. C. Vicksburg. D. Manassas

**math**

20

**Art**

his art style was romanticism, and im not sure if he was apaprt of any movement.

**physics**

the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

**statistics**

Scores on the ACT college entrance exam are Normally distributed with a mean µ = 20 and standard deviation σ = 5. An SRS of 25 ACT scores is selected, construct a 95% Confidence Interval for the sample mean (X-Bar) and interpret your result.

**math**

3x+3y+3z

**physics**

A solid sphere of radius 23 cm is positioned at the top of an incline that makes 23 degree angle with the horizontal. This initial position of the sphere is a vertical distance 3 m above its position when at the bottom of the incline. The sphere is released and moves down the ...

**physics**

A cylindrical 7.25 kg pulley with a radius of 0.864 m is used to lower a 7.13 kg bucket into a well. The bucket starts from rest and falls for 4.51 s. What is the linear acceleration of the falling bucket? The acceleration of gravity is 9.81 m/s^2.

**physics**

A 346 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. How large a torque would have to be exerted to bring the merry-go-round from rest to an angular speed of 4.7 ...

**geography**

Which continent have the oldest fossils been found?

**physics**

The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.9 rev/s in 8.5 s. At this point the person doing the laundry opens the lid, and a safety switch turns oﬀ the washer. The tub slows to rest in 11.6 s. Through how many...

**physics**

A remote-controlled car’s wheel accelerates at 22.7 rad/s. If the wheel begins with an angular speed of 11.0 rad/s, what is the wheel’s angular speed after exactly twenty full turns?

**physics**

A remote-controlled car’s wheel accelerates at 22.7 rad/s. If the wheel begins with an angular speed of 11.0 rad/s, what is the wheel’s angular speed after exactly twenty full turns?

**Pre Calc**

how much money should i invest at 8.2% compounded continuously if i wish to have $100,000 in 5 years?

**physics**

The planetMars requires 2.35 years to orbit the sun, which has a mass of 2 × 1030 kg, in an almost circular trajectory. Find the radius of the orbit of Mars as it circles the sun. The gravitational constant is 6.672 × 10−11 N · m2/kg2 . Answer in units...

**fractions from least to greatest**

1/6 4/24 16/96

**Chemistry**

H2P4: PHOTON EMISSION An electron in Li2+ falls from n = 2 to the ground state. Calculate the wavenumber, (νˉ), of the emitted photon.

**physics**

A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

**physics**

A 0.104 kg rock is attached to a 1.92 m long string and swung in a horizontal circle at a speed of 29.7 m/s. Find the tension in the string. Neglect the effect of gravity.

**physics**

A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

**Physics**

A student pushes stright along the handles of a mower with a force of 200 N. The handles make a angle of 20°, with respect to the horizontal. The frictional force for the 25 kg mower is 100 N. What is the normal force on the mower, and what is the acceleration of the mower?

**Thermodynamics**

Design Problem- A steam boiler may be thought of as a heat exchanger. The combustion gases may be modeled as a streram of air because their thermodynamic properties are close to those of air. Using this model, consider a boiler that is to convert saturated liquid water at 500 ...

**Thermodynamics**

Design Problem- A steam boiler may be thought of as a heat exchanger. The combustion gases may be modeled as a streram of air because their thermodynamic properties are close to those of air. Using this model, consider a boiler that is to convert saturated liquid water at 500 ...

**english**

what is the order of imortance? whoever answers this gets to meet my mom the mayor!!!!!!!!!!!!!!!!!!!!

**6th grade Math**

x/20=85/100. Cross multiply. x X 100 = 100x 85 X 20= 1700 Now divide 1700 by 100 1700 divided by 100=17 17 is your answer.

**Physics**

A m1 = 4.20-kg block on a smooth tabletop is attached by a string to a hanging block of mass m2 = 2.70 kg, as shown in the figure. The blocks are released from rest and allowed to move freely. a) Find the acceleration of the blocks. ___m/s^2 b) Find the tension in the string. ...

**Physics**

When you take your 1300-kg car out for a spin, you go around a corner of radius 57.8 m with a speed of 15.2 m/s. The coefficient of static friction between the car and the road is 0.82. Assuming your car doesn't skid, what is the force exerted on it by static friction? ...

**Math**

Yep

**science**

Why might a seed that falls on the ground in November wait until next April to germinate?

**Biology (PLZ HELP)**

Researchers discovered that zooplankton in Narragansett Bay now graze on floating algae more actively through the winter than they ever did before. What effect do you think this might have on the annual late-winter "bloom" of algae that occurs in the water?

**Math 8R - Help!!!!!!!!**

1/2+1/2+1/2+1/2+1/2+1/2+1/2= 3 1/2 The answer is 7.

**Biology**

Researchers discovered that zooplankton in Narragansett Bay now graze on floating algae more actively through the winter than they ever did before. What effect do you think this might have on the annual late-winter "bloom" of algae that occurs in the water?

**Biology**

How are decomposers like a city's recycling center?

**math**

In a study of the change of insect population,there was about 170 insects four weeks after the study began and about 320 after two more weeks. Assume an exponential model of growth. a.Find an equation relation the population to the time in weeks. b.estimate initial number of ...

**Physics**

At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.1 m until, at t = 1.52 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find the change in its ...

**Physics**

Tricky little problem makers. You don't need the coefficients after all. I got it!

**Physics**

A crate of potatoes of mass 23.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.78 and μk = 0.35. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. I don't ...

**chemistry**

When 47.5J of heat are added to 13.2 g of liquid, its temperature rises by 1.72 degrees C. What is the heat capacity of the liquid? A cook wants to heat 1.35kg of water from 32.0 degrees C to 100 degrees C. If he uses combustion of natural gas to heat the water, hou much ...

**chemitry**

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5°C, what is its final temperature? (density of aluminum = 2.70g/cm3)

**science**

answer is 269.8m or 270 in significant figures if you are curious.

**science**

A 49 kg person drinks 270. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending ...

**Algebra**

Wow chase, a, b, c, d. Very creative. It's not that.

**College Physics**

7.1 m/s *if only using 2 sig. figs. actual answer = 7.06666667

**PLEASE HELP CHEM DR BOB :O**

Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde -3 phenylpropanal

**Dr. Bob please help :)**

Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde -3 phenylpropanal

**Chem**

Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde -3 phenylpropanal

**math**

?

**health**

ME TOO OMG

**7th grade math**

solve for k -4k-8k+7=-53 Please explain how you found your answer!! Please help!!

**measurments**

To Ms. sue sorry late reply, no its just a typo but i still need help

**measurments**

which has the least value? 3130 L+38126 cl+ 3403 ml 394 kl+ 1425 Kl+ 490L please show work!

**7th grade math**

nevermind i figured it out

**7th grade math**

1. Substitute: Ms.Kubagwa is six years younger than Ms. Vea. The sum of there ages is 52 years. I HAVE NO CLUE WHAT TO DO HERE!! 2.Ms.starbrowski has four more pens than Mr.Dukeman. Together they have 34 pens. How many pens does Ms.Starbrowski have? *Please explain how you ...

**Math**

a farmer wants to fence in part of her land so that her chickens will have thier own little area. if she only has 28 feet of fence, what is the area of the largest pen that she can build?

**Social Studies**

the answer is not oregon because i got it wrong on my test...

**physics ( DENSITY )**

Assume that the density of a human is 1.13 g/cm3. What is the volume of a 51.5 kg person?

**Algebra 1A**

The temp dropped 17 degrees. What you do to solve it is 0-17. Though it's already a negative 17 so the equation would look like this: 0-(-17)=17. So the temp has dropped 17 degrees.

**chemistry**

A bond between two sugar molecules is formed by which of the following types of reactions? oxidation-reduction condensation single-replacement double-replacement

**statistics**

you have requirement that men must be at least 74 in tall and women must be at least 70 in tall. the men height is 69 in +/-2.8 and women mean height is 63.6 +/-2.5. If the requirement s changed so that the tallest 4% of men and women are eligible, what would be the new ...

**ICT**

(a) Direct access (b) Sequential access

**Math**

24 inches is perimeter but what about the ratio (its been a long time since we went over this in school and I have forgoten a lot)

**Math**

IN a square with each side measuring 6inches what is the ratio of the perimeter to the area? Please show work for this!!

**Geometry**

Umm I am not sure

**math**

-7, -4, -1, 2 it is a mathematical sequence

**geometry**

what is the area of a isosceles trapezoid with legs of 15 feet and bases of 10 feet and 28 feet?

**Science**

What is the total braking distance for a car that is going 60km/h on wet road (0.10)? The drivers reaction time is 1.5 seconds.

**calculus**

given the circle x^2+y^2+2x-2y-14=0, find it's intersection with the y-axis. please help me....

**CHEMISTRY**

I suck at chem

**algebra**

f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and then use the quadratic ...

**algebra**

f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and then use the quadratic ...

**algebra**

f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and then use the quadratic ...

**algebra**

Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the ...

**algebra**

Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the ...

**algebra**

Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the distance of the skid ...

**math**

Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the distance of the skid ...

**math**

Use your graphing calculator to find how many seconds before the projectile hits the ground. Let y1 = −16t2 + 800t, or factor and solve for t algebraically

**math**

The length of a rectangle is 3 inches more than its width. If the area of the rectangle is 180 square inches, write an equation for the above situation