Sunday

September 25, 2016
Total # Posts: 47

**physical science**

a head ball of mass 600g is thrown vertically upwards from ground level and reaches the maximum height of 20metres.calculate the initial velocity of the ball

*February 18, 2016*

**Chemistry**

How many grams of O2 are released into the environment during the production of the 5.1 grams of glucose?

*December 7, 2015*

**english (jurassic park)**

How does the protagonist in Jurassic Park by Michael Crichton (Dr. Alan Grant) change throughout the novel?

*September 17, 2015*

**science**

A solution is prepared by dissolving 0.490 g of an unknown compound in 50.00 mL of water. The freezing point of the solution is –0.201°C. Assuming the compound is a non-electrolyte, what is the molecular mass of the compound? Use 1.00 g/mL as the density of water.

*August 30, 2015*

**math**

6,300 and 530 The value of 3 in is times The value of 3 in

*August 24, 2015*

**MATHSS PLESE HELP**

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...

*April 11, 2015*

**MATHSS**

A manufacture finds the total cost “C” for a product is expressed by C=3x2-8, and the total revenue “R” by R=3x-2, where x is the number of units sold. What is the breakeven point (where total cost=total revenue) to the nearest unit?

*April 11, 2015*

**MATHSS**

Two resistors in series, R1 and R2, have a total resistance of 1,600 ohms. The resistance of R2 is 560 ohms less than twice R1. Find the resistance of R1 and R2.

*April 11, 2015*

**MATHSS**

he law connecting friction F and load L for an experiment is of the form F =aL+b, where a and b are constants. When F =5.6, L=8.0 and when F =4.4, L=2.0. Find the values of “a” and “b “and the value of F when L=6.5.

*April 11, 2015*

**MATHSS**

The angle of a rotating shaft turns in t seconds is given by theta= ω+1/2at^2 and it is given that ω=3 2 rad/s and α=0.6 rad/s to complete θ=4 radians. Determine the time taken to complete θ=4 radians.

*April 11, 2015*

**MATHS **

A manufacture finds the total cost “C” for a product is expressed by C=3x2-8, and the total revenue “R” by R=3x-2, where x is the number of units sold. What is the breakeven point (where total cost=total revenue) to the nearest unit?

*April 11, 2015*

**Physics**

F=m*a It only asks about the force from the dragster, so ignore gravity. F = 72*a a = (Vf-Vo)/t a=61/7.8 F = (72)(71/7.8)

*November 30, 2014*

**AP Calculus**

infinity, (x-1)^2 goes towards a tiny positive number.

*November 30, 2014*

**maths**

simplify by removing radical signs and negative indices where ever they occur:- ¡Ì4 power -3/4

*July 25, 2014*

**Science -Check Answers-**

DrBob222 you're an idiot. The first is true and the second is a conductor

*May 21, 2014*

**Math**

Start with 1 and 2, and subtract (1+2) from the sum 26: 26 - (1+2) = 23. Now, since the largest number used will be 12 and we've just used 1 and 2, the remaining edge number must be 11: 23 - 12 = 11 So the first edge set is {1,2,11,12}, the next set is {1,3,10,12}, and the...

*May 7, 2014*

**Physics**

During a free kick at a soccer playoff game a 0.5 kg ball at the peak of the kick 16.6 m above the field had a kinetic energy of 35.4 J. How fast was the ball booted by the player on the field?

*March 18, 2014*

**Honors Physics**

0.5 kg ball at the peak of the kick 16.6 m above the field had a kinetic energy of 35.4 J. How fast was the ball booted by the player on the field?

*March 18, 2014*

**Physics**

The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching.

*November 14, 2013*

**Physics**

The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching.

*November 14, 2013*

**Physics**

The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching.

*November 14, 2013*

**general physics**

The highest barrier that a projectile can clear is 18.8 m, when the projectile is launched at an angle of 59.0 ° above the horizontal. What is the projectile's launch speed?

*July 3, 2013*

**Math**

how can you go about in calculating vertical and horizontal asymptotes?

*April 25, 2013*

**English**

Yes, it is correct

*April 24, 2013*

**Chemistry**

How much of a 2.0 molar NaCl solution would you need to make 250 mL of a .15 molar NaCl solution?

*January 15, 2013*

**Economics**

Explain how an effective price ceiling affects buyers and how it affects sellers in a competitive market.

*September 17, 2012*

**chemistry**

how can i find pH using scientific notation? 1*10^1 1*10^2

*May 3, 2012*

**math**

800

*December 7, 2011*

**Chemistry **

C2H5OH + O2 -> C2H4O2 +H20 This reaction drastically changes the taste of wine, if 100.0 mL of wine initially contained 12.0 g of ethanol and after a period of time 4.00 g of acetic acid were detected, what percent of the ethanol had been converted?

*June 7, 2011*

**Chemistry**

Determine how many grams of active antacid ingredient AL(OH)3 would be necessary to neutralize the HCL in 50.0 mL of .0100 M HCL (an approximation of the conc. of HCL in the stomach) 3HCL9aq)+AL(OH)3(s)-> AlCL3 (aq) = 3H2O (L)

*June 7, 2011*

**Chemistry**

2MnO4-(aq) +5 H2O2 (aq) + 6H+(aq) -> 5 O2(g) + 2 (Mn2+(aq) = 8H2O (l) If a 25.00 ml sample of hydro peroxide required 25.25 ml of .353 M KMNo4 solution to react with all the hydrogen perozide what was the molarity of the hydrogen peroxide solution?

*June 7, 2011*

**Chemistry**

What volume of .300 M CaCl2 is needed to react completely with 40.00 Ml of .200 M H2PO4. according to the following equation 3 CaCl2 (aq) + 2 H3PO4 (aq)-> Ca3(po44)2 + 6 HCL (aq)

*June 7, 2011*

**Chemistry**

Thank you!

*June 7, 2011*

**Chemistry**

.220 mol per liter

*June 7, 2011*

**Chemistry**

0.255 g sample of H2C2O4 required 25.70 mL of NaOH to neutralize, what would you report as the molarity of NaOH solution? the reaction is as follows: H2C2O4(aq) +2 NaOH (aq) -> Na2C2O4(aq) +2 HOH (l)

*June 7, 2011*

**math**

What is 5,280 feet divided by 26 miles? 5th grade

*March 31, 2011*

**Chemistry**

What are all the resonance Structures of Carbon Tetraoxide?

*November 9, 2010*

**calc**

(e^x)e^x+1)/(e^x-1)=8

*October 18, 2010*

**precalc**

yes it is x squared

*October 18, 2010*

**6th grade science**

how come a chromosome is not visible in an onion cell

*September 27, 2010*

**Chem**

plz help :(

*November 7, 2008*

**Chem**

Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper atom, Cu. Like for...

*November 7, 2008*

**5th grade**

What did Henry Hudson negotiate with his crew and the natives?

*October 7, 2008*

**5th grade-social studies**

How Hudson could have negotiated to improve his circumstances with his crew and the natives?

*October 1, 2008*

**science**

The number of letters that could represent an element is?

*November 23, 2007*

**climate graphs**

I need a climate graph of Rome Italy NOW! my homework is due next period!

*March 4, 2007*

**Physics**

Emily passes a soccer ball 9.7 m directly across the field to Kara, who then kicks the ball 11.7 m directly down the field to Luisa. What is the magnitude of the ball’s total displacement as it travels between Emily and Luisa? Answer in units of m 016 (part 2 of 2) 10.0 ...

*December 10, 2006*

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