Friday

September 30, 2016
Total # Posts: 182

**physics**

A golf ball with a mass of 0.080kg initially at rest is given a speed of 50 m.s-1 when it is struck by a golf club. A) If the club and ball are in contact for 1.5 millisecond (0.0015 seconds), What average force acts on the ball? B) What impulse was delivered? c) What was the ...

*May 5, 2016*

**physics**

Doyle goes bowling with a cement brick to improve his score. If the brick has a mass of 1.5kg and an initial speed of 5.0m/s upon release a)how much kinetic energy did it possess upon release i.e. when let it go and b)how far will the brick slide before coming to a halt if the...

*May 4, 2016*

**Physics**

Not sure if done correct!

*May 3, 2016*

**Physics**

Kati observes a force of 15 Newtons stretch a spring a distance of 0.450m. a) what is the elasticity coefficient of the spring and b) how much force must be done to stretch the spring a distance of 0.750m? a) F=Kx 15=K(0.450) 15/0.450=k 33N=k It seems off to me know sure if ...

*May 3, 2016*

**Physics**

got it thanks for your help

*May 3, 2016*

**Physics**

or do I need to use one of these equations Fcos thata d= 1/2mVf^2-1/2mVo^2 or F*D=1/2mVf^2-1/2mVo^2

*May 3, 2016*

**Physics**

so a and b are equal to the same Joules? Sorry I'm so confused

*May 3, 2016*

**Physics**

thank you but looking at my notes it says work = Fcos thata d buthow do plot F and D that I do not have

*May 3, 2016*

**Physics**

A pitcher throws a fast ball with a speed of 45m/s. The ball has a mass of 0.145kg. How much a) kinetic energy is given to the ball and b)What work was done in throwing the ball? Vo=45 m/s Mass= 0.145kg A) KE? KE= 1/2mV^2 A) 1.5x10^2 kg*m/s B) WK=Change in KE but I'm stuck...

*May 3, 2016*

**chemistry**

If 17.5 mL of 0.553 M KOH is needed to neutralize 25.0 mL of an HBr solution what is the molarity od HBr solution

*May 3, 2016*

**Math**

A marathon covers 26 miles and 385 yards. If a runner averages 1.8 meters per second, how long in hrs will it take to complete the marathon?

*May 2, 2016*

**geometric sequences**

given the geometric sequences:9 90/17, 900/289 find an explicit formula for an, where the first term is a1=9 an= a10=

*April 25, 2016*

**Physics**

thank you for your help

*April 15, 2016*

**Physics**

ok I think I figured it out mu=0.67

*April 15, 2016*

**Physics**

Jason approaches a rotary in her 3,500kg Mercedes. Its radius of curvature 95m but his speed is 25m/s. The acceleration is 6.6 m/s^2. What is the coefficient friction between his tires and the road? I know Mu mg=mv^2/R but I am unable to complete my equation and continue to ...

*April 15, 2016*

**Physics**

thank you

*April 15, 2016*

**Physics**

Eli went for his driving test in an ice storm. He told the registry tester not to worry. He can negotiate an exit ramp at 35 km/hr that has a radius of curvature of 95m. a) What was his speed in meter/second? b)Find required angle for his banked curve to handle an ice filled ...

*April 15, 2016*

**Physics**

m=.00192?

*April 15, 2016*

**Physics**

a=6.6m/s^2? I'm still confused with m I got a negative number which is wrong

*April 15, 2016*

**Physics**

"Crash" Jackson approaches a rotary in his 3,500 kg Maserati. It's radius of curvature is 95meters but his speed is 25 m/s. What is his acceleration in m/sec/sec and find his coefficient of friction between his tires and the road?

*April 15, 2016*

**Math**

16. 1.26*10^7 17. 8.8*10^-5

*April 15, 2016*

**Physics**

thank you for your help

*April 15, 2016*

**Physics**

sorry not minutes but 15 seconds

*April 15, 2016*

**Physics**

A 0.025kg rubber stopper is swung in a horizontal circle by a 0.95 meter threat that makes 25 revolutions every 15 minutes. a) what is the stoppers speed? b) what is the acceleration? c) what is the value of the centripetal force?

*April 15, 2016*

**Math**

The 8th term of 40,10, 5/2, 5/8

*March 4, 2016*

**Chemistry**

How much energy in kJ is needed to heat 7.0L of water from35 degrees Fahrenheit to boiling point 100 degrees Celsius. If the density of water is 1.0g/cm^3 and the heat capacity of water is Cp= 4.184J/g degrees Celsius

*February 12, 2016*

**ALGEBRA**

Create 2 equations to the following: How many hamburger buns and hot dog buns can I buy for $20 if the hamburger buns cost $2 a package and hot dog buns cost $1.50 a package?

*February 9, 2016*

**Math**

Thank you!:)

*November 27, 2015*

**Math**

The air temperature decreases by about 1 degree Fahrenheit for each 300 feet of altitude. a) Find a function T(x) for the temperature at an altitude of x feet if the sea-level temperature is 45∘F. (b) Find T(1000). [Round to two decimals] I considered two sets of points...

*November 27, 2015*

**Math**

try to understand the answers here. jiskha dot com/display.cgi?id=1354313665 (remove the spaces, change dot into an actual dot ( . ))

*November 24, 2015*

**Math**

omygod i know the answer now... i solved hahaha. nevermind

*November 24, 2015*

**Math**

Substitute numbers for the letters to make the equation true. Same letter has the same number. Different letters have different numbers. x + x + y = 20 y + a - y = 9 y + x = 13

*November 24, 2015*

**Math**

Liwanag sold 37 tickets to Manila Zoo. Adult tickets cost Php 3.50 and child tickets cost Php 1.25. She collected 73.25 from the sales of the tickets. How many of each kind were sold?

*November 24, 2015*

**Math**

Six years ago, Jim was four times as old as Fe. In four years, he would be twice as old as Fe. How old are they now?

*November 24, 2015*

**Pre-Cal**

A penny is dropped from the top of Bank of America building. How long does it take to reach the group? Assume the back is 1024 ft high. My work so far: -16t^2+0t+1024 t=8 sec Is this correct? Thanks!

*September 14, 2015*

**numerical analysis**

find the smallest positive root of the equation f(x)=2sinx+x-2=0 using the false positive method.

*September 5, 2015*

**Physics**

Jill and Traci are side by side in their cars at a red light. When the light changes, Jill takes off with an acceleration of 2.4m/sec^2. Traci waits 3 seconds and then takes off with an acceleration of 4m/sec^2. How long will it take her to catch Jill? I've tried using the...

*September 2, 2015*

**Calculus **

A 6 feet tall man walks away from a streetlight that is 15 feet high at a rate of 5 ft/s. Express the length 's' of his shadow as a function of time. What I have so far: I set up a triangle and used similar triangles to create a ratio (6/s) = (s/d+s) s = (6d + 30/15s) ...

*August 31, 2015*

**math**

Saturday 6742/17 = 396.58 --> 396 people Sunday 5487/17 = 322.76 --> 322 people 396 + 322 = 718 people

*August 31, 2015*

**math**

A Thai restaurant offers the curry special: curry vegetables with your choice of beef, chicken tofu or shrimp. Choose yellow curry, green curry or red curry. Drink included: tea or soda. If a customer makes all choices randomly, what is the probability that she orders a yellow...

*May 5, 2015*

**english**

its c. their

*April 28, 2015*

**geography**

social, political, and economic changes made under the tokugawa shogunate

*March 1, 2015*

**geography**

how did cultural diffusion impact the development of japan

*February 28, 2015*

**geography**

describe the food people achievements inventions art and architecture of china under kublai khan

*February 28, 2015*

**geography**

why did the mongol dynasty collapse

*February 28, 2015*

**geography**

how geography affects the way of life in japan

*February 28, 2015*

**geography**

compare geography of japan and greece

*February 26, 2015*

**geography**

how did the mongols conquests promote cultural diffusion

*February 26, 2015*

**geography**

can any one tell me about the command system of mongols?

*February 26, 2015*

**english**

explain how johnny learns? how can he be helped? how can he help others? from the play;outsiders chapter 5

*February 25, 2015*

**english**

oh no

*February 25, 2015*

**english**

hi ms sue plzz answer the question

*February 25, 2015*

**english**

plzzz answer this question as soon as possible

*February 25, 2015*

**english**

this is the queston of the play of outsiders

*February 25, 2015*

**english**

chapter 5 the outsiders

*February 25, 2015*

**english**

what do the supplies tell you about johny

*February 25, 2015*

**algebra**

factor the polynomial 3x^2+3x-6

*February 25, 2015*

**algebra**

factor the polynomial 3h^2+11h+6

*February 25, 2015*

**english**

Where?

*January 21, 2015*

**english**

Behaviours of dracula

*January 21, 2015*

**english**

ok thank you soo much!! i got the answers i needed

*January 21, 2015*

**english**

Please can you help me

*January 21, 2015*

**english**

yes it is. i already wrote that for characteristics but i need help about his behaviour

*January 21, 2015*

**english**

What are some behaviours of Dracula? i have two so far: appears during the night leaves two punctures on his victims neck

*January 21, 2015*

**english**

well after she turns into a vampire her friends and husband had to strike a stake through her heart, in which she dies and stops being a vampire

*January 21, 2015*

**english**

But with dracula, he attacks Lucy she turns into a vampire?? is that homicide?

*January 21, 2015*

**english**

if dracula is sucking the blood of his vistcms, would it be called homicide or what??

*January 21, 2015*

**english**

Ok. i am following the victimology for a criminal profile??

*January 21, 2015*

**english**

How should i start to write a victimology about dracula

*January 21, 2015*

**biology(really need help!)**

i know.. but i cant find anywhere online about its role and ecological issues

*December 25, 2014*

**biology(really need help!)**

What role does the lilac flower play in its natural ecosystem? What is its niche in the food web Are there any ecological issues surrounding the lilac flower(e.g. are its populations decreasing, is it spreading uncontrollably..)

*December 25, 2014*

**Physics**

i think the answer would be 3827.1

*November 15, 2014*

**Physics**

A 1.50 X 10^2g piece of brass(specific heat capacity 3.80 X 10^2 J(kgC) is submerged in 400 mL of water at 27.7 Degrees Celsius. What is the original temperature of the brass if the mixture has a temperature of 28.0 degrees Celsius

*November 15, 2014*

**chemistry **

Complete the following reactions, where applicable. If no reaction occurs write N.R A) blank + blank ---> Cu(NO3)2 + PbSO4 B) C6H12O6 + O2 --> blank + blank C) AgNO3 + CuCI2 ---> blank + blank

*November 1, 2014*

**Math**

Randolph runs a home appliance repair business and charges a service call fee of $85 plus $15 per half hour for his labour. Write an equation for calculating the total charges, C, in terms of hours of labour, H. Plot the graph of C vs. H and define the slope and C-intercept of...

*October 31, 2014*

**physics**

A child pulls a wagon by the handle along a flat sidewalk. She exerts a force of 80.0 N at an angle of 30.0 above the horizontal while she moves the wagon 12 m forward. The force of friction on the wagon is 34 N. Calculate the mechanical work done by the child on the wagon ...

*October 28, 2014*

**PLEASE HELP! SCIENCE**

The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35

*October 26, 2014*

**Physics please help!**

A sprinter starts from rest and accelerates for 5s. He then travels at a constant velocity for 10s. Finally he slows down to a stop in 5s. Draw a d-t graph to represent his motion. Then draw the corresponding v-t and a-t graphs

*September 17, 2014*

**5th grade math**

What is the best estimate of for the product of 289 and 7?

*August 25, 2014*

**Organic biochemistry**

How to draw the skeleton structure for diethylammonium bromide?

*July 2, 2014*

**Probability**

Calculate the (modeled) probability P(E) using the given information, assuming that all outcomes are equally likely. n(S) =8, n(E) =4

*June 22, 2014*

**Frequency**

Calculate the relative frequency P(E) using the given information. 400 adults are polled and 320 of them support universal health care coverage. E is the event that an adult does not support universal health coverage. P(E)=?

*June 22, 2014*

**Probability**

Four coins are tossed. What is the probability of getting more tails than heads and getting at least two heads?

*June 22, 2014*

**Probability**

If the events A and B are disjoint, A Intersection B =0, P(B) = 0.17 and P(A U B)=0.55. Find P(A)

*June 22, 2014*

**Probability**

How many unordered sets are possible that contain four objects chosen from thirteen?

*June 22, 2014*

**Compute**

Compute the indicated quantity P(A probability B) = .1, P(B) = .5. Find P(A interception B).

*June 22, 2014*

**Probability**

How many ordered lists are possible that contain five objects chosen from seven?

*June 22, 2014*

**Probability**

Consider D ={red, blue, green} and F = {ball, car} find DXF

*June 22, 2014*

**Probability**

I P(B) = 0.4, find P(B')

*June 22, 2014*

**Probability**

Let A and B be two events with P(A interception B)= 0.2, P(B) =0.15, and P(A U B)= 0.75. Find P(A)

*June 22, 2014*

**Probability**

Four Coins are tossed. Describe the sample space S, probability of getting more tails than heads and probability of getting at least two heads.

*June 22, 2014*

**financial**

710.78 to the nearest cent: 710.79 either one will be correct.

*June 14, 2014*

**financial **

If I want my rent in 4yrs to be 900dllrs. The owner of the apartment building told me that the rent will increase 3% every year compounded every year. What should be my rent today?

*June 14, 2014*

**future value for simple interest**

2 years

*June 14, 2014*

**future value for simple interest**

a 5000 loan, taken now with a simple interest rate of 4% per year, will require a total repayment of 5400dllrs. After how many years t will the loan mature?

*June 14, 2014*

**financial**

40 annual interest rate

*June 14, 2014*

**financial**

an investment of 3000 will pay a total of 600dllrs simple interest after 5yrs. what is its annual interest rate?

*June 14, 2014*

**spanish**

number 1 is jugador is (Player)

*January 31, 2014*

**history help plzzzzzz**

katt * i like zack a lot* its 8th grade

*January 29, 2014*

**biology**

In a population with two alleles, B and b, and the allele frequency of b is 0.4. Calculate the allele frequency of heterozygotes if the population is in Hardy–Weinberg equilibrium? Show your work. Thanks for any help in advance!

*August 1, 2013*