# Posts by Melissa

Total # Posts: 1,315

**UV**

the two lenses in contact are 45 cm away from the object and the distance of the object from the image is 110 cm. if one of the two lenses in contact has a focal length of 15cm, what is the focal length of the second lens? thanks :)

**physics**

You reach out a second-story window that is 17 m above the sidewalk and throw a 2-kg ball straing upward with 17 J of kinetic energy. Use g = 10m/s^2 Part A) What is the ball's gravitational potential energy when it is released? Use a height measured from the sidewalk. ...

**physics**

A jet plane takes about 56 s to go from rest to the takeoff speed of 120 mph (miles per hour). What is the average horizontal force that the seat exerts on the back of a 60-kg passenger during takeoff? First make sure that each of the values are in SI units. Use 1 mile = 1609...

**a**

A compter software retsilor used a matkup ratr of 30%. Find the selling price of a computer game that costs the retsilor 15 dollard

**physics**

An astronaut in full gear has a weight of 2900 N on Earth. Jupiter; weight on planet relative to earth is 2.53 and weight of a 150-lb person is 380. How much will the astronaut weigh on the Jupiter? W_{Jupiter} =________________ N Neptune; weight on planet relative to earth ...

**math**

sec tangent= 2 square root of 3/3 and sin tangent= -1/2; find cot tangent

**physics**

A planet has a radius of about 0.85 times Earth's radius and a mass of only 0.74 times Earth's mass. Estimate the acceleration due to gravity on the planet. Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 kilometers a_{planet} = ________________{m}/{s^2...

**physics**

The acceleration due to gravity on a certain planet is about 6.5 \frac{m}{s^2}. What would a 78-kg scientific instrument weigh on Titan? W_{instrument} =______________ N (no rounding up)

**physics**

A 470-kg satellite experiences a gravitational force of 850 N. Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 kilometers What is the radius of the satellite�s orbit? r_{orbit} = _____________kilometers What is its altitude? altitude = ...

**physics**

The gravitational force between two metal spheres with the same masses are in outer space is 60 N. How large would this force be if the masses of each sphere were cut to a fourth of its original value? F_{attractive} =_____________ N (no rounding up)

**physics**

Two spacecraft in outer space attract each other with a force of 45 N. What would the attractive force be if they were \frac{1}{5} as far apart? F_{attractive} = _____________N (no rounding up)

**math**

What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}

**physics**

What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}

**math**

1.B 2.A 3.A 4.A 5.B 100% Trust me!! I got 100% just by guessing.! Do not listen to "Jeni_Jedi" THIS WILL GIVE U 100% NO LIE! IF U WANT TO PASS AND GET 100% FOLLOW MY ANSWERS!

**Math 102**

70%

**Chemistry**

What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? [Show work]

**math**

Find the area for the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd 22. Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth.

**forces**

Two teams of nine members each engage in a tug of war. The first team's members have average masses of 64 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 69 kg and exert average forces of 1365 N horizontally. (a) ...

**history**

Whoops I mean't would 3 be B? D A B D

**history**

Okay. Would 1 be D? and 3 be C?

**history**

I went back and re-read. and now i've came up with, 1. A 2. A 3. D 4. D

**history**

Please please check my answers? and correct if needed? Thanks! 1. Which of the following represents an argument for annexing Texas? (1 point) Another slave state would be added, causing political debate. Texas was an independent state, so a treaty would need a two-thirds vote...

**History**

Can someone please check my answers and help me correct them if they are wrong? Thanks! <3 1. Which of the following describes changes to the industry in South Carolina during the 1800s? (1 point) an increase of pottery factories building factories to turn raw cotton into ...

**vectors**

In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great deal during the day, and he is blown along the following straight lines: 2.5 km 45° north of west; then 4.70 km 60° south of east; then 5.1 km straight east; then 7.2 km...

**physics**

An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 23.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station in 210 m long. (a) How long is the nose of the train in the station? (b) How fast is ...

**college physics**

a) A light-rail commuter train accelerates at a rate of 1.25 m/s2. How long does it take it to reach its top speed of 80.0 km/h starting from rest? (b) The same train ordinarily decelerates at a rate of 1.75 m/s2. How long does it take to come to a stop from its top speed? (c...

**college physics**

A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 10.0 m/s and accelerates at the rate of 0.600 m/s2 for 7.00 s. (a) What is his final velocity? (b) The racer continues at this velocity to the finish line. If he was 300 m ...

**college physics**

A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 10.0 m/s and accelerates at the rate of 0.600 m/s2 for 7.00 s. (a) What is his final velocity? (b) The racer continues at this velocity to the finish line. If he was 300 m ...

**college physics**

An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 23.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station in 210 m long. (a) How long is the nose of the train in the station? (b) How fast is ...

**Science**

Can someone please check my answers and if they are wrong can you help me fix them? Thank so much!! 1. Which of the following determines the strength of the force of gravity between two objects? Check all that apply. (2 points) the speeds of the objects the masses of the ...

**College Physics**

can you tell me how you got that? I have a test soon and I seriously don't get it

**College Physics**

Assume that an MX missile goes from rest to a suborbital velocity of 4.50 km/s in 30.0 s (the actual speed and time are classified). What is its average acceleration in m/s2? What is its average acceleration in multiples of g?

**Anatomy & Physiology**

I took A&P just last semester, had to learn every notch and curve on every single bone, it is a lot of hard work.

**Anatomy & Physiology**

it is prone

**college physics**

A commuter backs her car out of her garage with a constant acceleration of 1.20 m/s2. (a) How long does it take her to reach a speed of 1.60 m/s? s (b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration?

**accounting**

What does a business owner do when the cash balance approaches zero and there are bills to be paid? (Hint: look at the financing activities of the Cash Flow Statement and then look at the Retained Earnings statement) What does a business owner do when there is an accumulation ...

**Math**

what is constant of proportionality?

**GUESS MY RULE WITH LETTERS**

I CAN`T FIND OUT WHAT THE RULE IS I KNOW THAT THE LETTERS THAT ARE IN THE RULE ALL HAVE STRAIGHT LINES N THE ONES THAT DO NOT FIT ALL HAVE CURVES I JUST NEE TO KNOW WHAT THE RULE IS PLEASE SOMEONE HELP ME

**Math Quick Question**

i confess i like wiiliam mondrago

**MATH HELP**

A. (a^-2/3)^-t

**MATH HELP!!**

A. (a^-2/3)^-t B. (b^1/3)^3/5

**chem**

What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?

**CHEMISTRY**

Calculate the volumeof benzene,C6H6,d=0.88g/ml,molar mass=78.11 g/mol isrequired to produce 1.5 x 10^3 kJ of heat according to the following reaction?

**Chemistry**

Complete these Brønsted-Lowry reactions: HSO4- + H+ <--> HSO4- +OH- <-->

**science**

Identify a viewpoint from the text that highlights the importance of biodiversity. Do you believe every species is connected to one another, as expressed in the text? Why or why not? Give an example of a case where the extinction of one species might effect the life of another.

**chemo**

How much heat (in kJ) does it take to melt 28.4 grams of ice at 0 °C and raise the temperature of the resulting water to 25 °C? Heat of fusion 334 J/g, Specific heat 4.184 J/g °C ?

**College probability and statistics**

The current license plates in New York State consist of three letters followed by four digits. ( i ) How many possible distinct license plates can there be? ( ii ) How many possible distinct license plates could there be if the letters O and I and the digits, 0 and 1 were ...

**physics**

Help please ! been stuck on this for hours. A model rocket blasts off and moves upward with an acceleration of 13m/s^2 until it reaches a height of 25m , at which point its engine shuts off and it continues its flight in free fall. 1) What is the maximum height attained by the...

**Math (HELP PLEASE)**

Estimate the total precipitation in inches and the total number of days with precipitation for Asheville and Wichita

**Social studies**

What company did parliament try to help with the tea act

**health**

D for both

**Math**

The regular admission price for an amusement park is $72. For a group of 15 or more, the admission price is reduced by $25. How many people need to be in a group to save $500? Need Answer step by step.

**math**

Sam bakes 10 trays of cookies using 8 cups of milk how many cups of milk does he use for each tray of cookies?

**math**

Seven friends share 3 liters of apple juice equally how much juice does each friend get?

**statistics**

The scores for standardized test are normally distributed with a mean of 300 and standard deviation of 39. If the test is given to 700 students, how many are expected to have scores between 300 and 378.

**Finance**

If upon retirement in 20 years Simon plans to invest $400,000 in a fund that earns 5%, what is the maximum annual withdrawal he can make over the following 15 years?

**math**

The answer to the maths question was: "age>21". Make up a question that could have this as an answer.

**math**

PsyDAG, The answer to the questions is 'age greater than', so you wouldn't say "the legal voting age is greater than 21." What other questions do you think you could create with 'age greater than' as the answer? Melissa

**math**

The answer to the maths question was: "age>21". Make up a question that could have this as an answer.

**History**

The creation of minority group status largely depends on: A. The nature of the contact situation B. The size of the dominant group C. Whether the dominant group is assimilationist or ...

**Alternative Sweeteners Help**

What is the relative difference in sweetness between sucrose and saccharin, tagatose, sucrolose, aspartame, neotame which is marketed as sweet n low, equal and nurtasweet, splenda?

**physics**

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.845 m/s encounters a rough horizontal surface of length scripted l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant ...

**math**

Make the equation 2x + 5x = 119 7x = 119 x = ? Times that number by 2 and 5 and you should get the two numbers

**Geometry Honors**

Can someone help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the...

**Geometry**

Can you help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the ...

**physics**

A square loop 23.5 on a side has a resistance of 2.80 . It is initially in a 0.575 magnetic field, with its plane perpendicular to , but is removed from the field in 35.0 .

**Chemistry**

A saturated solution of potassium nitrate in water is prepared at 70.0*C then cooled to 55.0*C how many grams of potassium nitrate crystallized--- how do I determine this using my graph with everyone's numbers

**math for business and finance**

What sinking fund payment would be required at the end of each three-month period, at 8% interest compounded quarterly, in order to amount to $20,000 within 5 years?

**english**

Some ancient and medieval works have several qualities present in novels. true or false.

**language arts & writing**

My apartment has 2 bedrooms. My apartment has 1 1/2 bathrooms. a)comma b)and c)or d)but e)because

**language arts & writing**

My apartment has 2 bedrooms. My apartment has 1 1/2 bathrooms. a)comma b)and c)or d)but e)because

**Help Please Stat-Math**

According to an airline, a particular flight is on time 75% of the time. Suppose 140 flights are randomly selected and the number of on time flights is recorded. Determine if you should use the Binomial model or Normal model to solve this problem. show work and write a ...

**Math-Stat Help**

In a random sample of 78 teenagers, 32 admit to texting while driving. Construct a 98% confidence interval for the percentage of teenager that text while driving. Start by showing that conditions for constructing a confidence interval are met. 1) Check conditions 2) confidence...

**algebra**

the local high school is setting up square-shaped lunch tables in the cafeteria. each table has an area of 12x^3-4x^2 square feet. if sqrt 3x+1 tables are put end to ed to form a banquet table, how long will the banquet table be? assume x>1/3 part 1: use theformula for area...

**math**

on a biology test a student answers 25 questions correct but doesnt pass. on second attempt he gets 37 correct. what is the percent of increase

**Math**

If Kelly gave 1/3 of a pizza to Holly and 1/5 to Diane how much did she have left?

**Venn Diagram Help Please**

If P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. draw a venn diagram for the probabilities of A and B.

**CHECK ANSWERS AND HELP PLEASE**

MATH-STAT

**CHECK ANSWERS AND HELP PLEASE**

if P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. 1) events A and B are independent =FALSE true or false or cannot determine 2) events A and B are disjoint =TRUE true or false or cannot determine 3) find P(A and B) =??????

**English (Check Please)**

. With what kind of life are the images in the second stanza of “Beat! Beat! Drums!” are usually linked?

**math**

There are 3 reds, 4 blues, 6 whites and 5 yellows in a bag. What is the probability that the first two you draw are both red if you do not replace the first one?

**Physics**

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.28 mm (2.80 10-4 m). A screen is located 2.7 m from the double slit. At what distance from the center of the screen will the first bright fringe beyond the center fringe appear...

**Physics**

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.44 mm (4.40 10-4 m). A screen is located 2.1 m from the double slit. At what distance from the center of the screen will the second dark fringe beyond the center fringe appear? ...

**health**

BMI is used to screen for______?

**weight**

researchers found that a ____ is more important and is the key to losing weight rather than a popular one.

**health**

for adults which ranges reflect an accurate BMI category

**weight**

why is having abdominal fat a serious concern

**health**

in order to loose weight you have to ___

**health**

national weight control registry

**health**

Why are fad diets considered unhealthy?

**weight**

Obesity can cause a person to develop what type of conditions?

**weight**

If you decided to lose weight then ____ help?

**Bio Help Please!!!**

1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?

**Bio Help Please**

1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?

**math**

y=-2x-1 how to set up to find what x is, this needs to graph as a linea equation.

**Physics**

A test charge of +3.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

**physics**

Two identical thin wires are oriented along the x and y axes. With current on x plane going North. Current on y plane going West.Both carry the same current I, and there is no electrical contact between the wires. The points A, B, C, D are each equidistant from both wires. A: ...

**Math**

Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)

**Math**

Steve, That still isn't the correct answer :(

**Math**

Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)