Thursday
July 31, 2014

Posts by LILY


Total # Posts: 1,106

Physics
A stone is thrown at an angle of 30 degrees above the horizontal from the top of a cliff with an initial speed of 12 m/s. If it hits the ground 4.6 seconds later, what is the height of the cliff?

English
????? Is to rock. Answer needs to have these letters. Clerad

P.S
Explain how parachute works?

History
Why did the British view colonial taxes as fair? Why did colonists argue British taxes were unfair?

US History
Why did the British view colonial taxes as fair? Why did colonists argue British taxes were unfair?

Math input/output
Input. Output 12. 10 16 32. 62. 35 70. 39 86 What is the rule I am in 5 th grade and have no clue

Chemistry
thank you!

Chemistry
Use principles of atomic structure to Explain why in aqueous solution, (a) potassium forms 1+ but not a 2+ ion (a) Ti3+ is colored but Sc3+ is not. (b) Ti2+ is a reducing agent but Ca2+ is not.

Chemistry
thankk you!

Chemistry
Suppose that a stable element with atomic number 119, symbol Wr, has been discovered. (a) Write the ground-state electron configuration for Wr, showing only the valence-shell electrons. (b) Would Wr be a metal or a nonmetal? Explain in terms of electron configuration. (c) On t...

Physics
The tightrope walker gets tired and decides to stop for a rest. During this rest period, she is in translational equilibrium. She stops at middle of the rope and finds that both sides of the rope make an angle of è = 10.00° with the horizontal. If the mass of the t...

Physics
Consider a plane with a velocity relative to the air of 198 m/s in a westerly direction. If the wind has a speed relative to the ground of 56 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due west of the first by...

Physics
A car of mass 1396 kg is parked on a very slippery hillside (see figure below). To keep it from sliding down the hill (è = 15°), the owner attaches a cable. If there is no frictional force between the road and the tires, what is the tension in the cable?

Physics
A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood surfaces is 0.61, what m...

Physics
Consider the system of blocks in the figure below, with m2 = 5.0 kg and è = 33°. If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?

Physics
A skier is traveling at a speed of 36.2 m/s when she reaches the base of a frictionless ski hill. This hill makes an angle of 15° with the horizontal. She then coasts up the hill as far as possible. What height (measured vertically above the base of the hill) does she reach?

Math
Barone’s Italian Restaurant advertises that its customers are much happier than the customers of its main competitors. The claim is based on the results of a customer satisfaction survey Which statement best describes why the graph is misleading? Barone’s rating look...

Physics
Two railroad freight cars with masses 110 Mg and 170Mg approach with equal speeds of 0.330 . They collide, the lighter car rebounding opposite its original direction at 0.270 m/s. Find the velocity of the heavier car after the collision. Assume the original direction of the li...

Physics
For the case of freefall, explain how to calculate the total distance traveled and the instantaneous velocity for an object that is dropped from rest by applying the fundamental meaning of acceleration and by using the two equations: Vav+(vf+vi)/2 and d=vav+t. Is this method a...

latin
Amicus nostris aedibus.

THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT
help me out check my answer please

THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT
The Articles of Confederation called for which of the following? A. A single legislative body B. A chief executive C. The right of the legislature to assess taxes D. The Northwest Ordinance 2. Jacques Cartier sailed to the New World in 1534 in search of A. Newfoundland. B. a n...

Physics
Stephanie serves a volleyball from a height of 0.85 m and gives it an initial velocity of +6.6 m/s straight up. How high will the volleyball go? The accel- eration of gravity is 9.81 m/s2. Answer in units of m

7th grade math help quick please
tanks

American History
can u help

American History
CAN U CHECK THEM 1A 2B 3C 4A 5C 6D 7B 8A 9D 10A 11A 12B 13B 14D 15A 16A 17A 18C 19C 20A

American History
can you please

American History
1. The Articles of Confederation called for which of the following? A. A single legislative body B. A chief executive C. The right of the legislature to assess taxes D. The Northwest Ordinance 2. Jacques Cartier sailed to the New World in 1534 in search of A. Newfoundland. B. ...

Math
Three consecutive integers have a sum of 357. Fid the integers algebraically. I know the three numbers are 118, 119, and 120 but how do you write it in an algebraic expression ?

7/8 Math
What I would do is subtract 20 on both sides so it would be: K/15= -3 Then times 15 on each side; you would rid of the 15 on the left side but on the right side you would get 45 because 3 times 15=45 K= 45

English/ History
In History, we are reading the book _My Brother Sam is Dead_ and one of the questions asked: What did Sam's being home reveal about discipline among the Rebel troops? Please help me understand what the question means, thanks!

7/8 Math URGENT!!!
Because on the left side, 8 is already positive and you want to get rid if it. You would then subtract 8 on both sides. -3x was already negative . Hope I helped !

Math
during the softball season, judy had 35 hits. Among her hits were one home run, 1 triple and 5 doubles. the rest of her hits were single ?

math
The sum of two decimal numbers is 5.3. Their differences is 1.7, and their product is 6.3. what are the two numbers?

Chemistry
When hydrochloric acid (HCl) is added to water it dissociates to form H3O+ (aq) and Cl− (aq) as shown below. HCl (aq) + H2O (l) → H3O+ (aq) + Cl− (aq) What happened to the electrons in the H-Cl bond? Choose the best answer. The electrons are transferred to t...

Chemistry
When a clear aqueous solution of calcium chloride (CaCl2) is mixed with a clear aqueous solution of sodium carbonate (Na2CO3), a white solid precipitate forms. What happens to the mass of the mixture after the solid precipitate forms? Choose the best answer. Mass decreases bec...

Physics
A driver in a car traveling at a speed of 76 km/h sees a cat 109 m away on the road. How long will it take for the car to acceler- ate uniformly to a stop in exactly 106 m? Answer in units of s

Physics
A car enters the freeway with a speed of 6.7 m/s and accelerates uniformly for 3.0 km in 3.8 min. How fast is the car moving after this time? Answer in units of m/s

world history
I need help answering this can anyone help or give an example thank you Identify a region near where you live and explain what sets it apart as a region. I live in California

hce
i need to find 3 pet peeves and 2 solutions for each. the probelm is that i cant find any wsolutions. ive found so many diffeerent pet peeves but no soltions. PLZ HELP ME:(

Chemistry
what's the balanced equation?

Chemistry
when 10.0 ml of a .20 M Cu (NO3)2 solution is mixed with 15.0 mL of 0.20M NaOH, what is the theoretical yield (grams) of copper (II) hydroxide?

5th grade religion
this is such a hard question

physic
what is the answer?

physic
what is the answer?

math math math
what are the formulas for the area and circumfrence of a circle

math math math
is it 40

math math math
24 is 60% of what numberr

math math math
35 is what percent of 200

help?
please

math refreshers
18 is what percent of 72? how to work this?

math refreshers
this one was supposed to be (-2/21) divided by (-2/15) show work please

math refreshers
show work please 6/25 divided by (-3/5) =?

math refreshers
show work please 6/25 divided by (-3/5) =?

math refreshers
2.4(-0.7)=? i think its -1.68

math refreshers
okay thats what i did thx im just checkin my math stuff for school

math refreshers
23.1 + (-9.81) = ?

math refreshers
oh okay thx

math refreshers
-9 - 22= ? -9 + 22 = 13? is that right

business law
A Fortune 500 CFO admits to having deliberately treated $4 billion in operating expenses as assets, thereby allowing the corporation to show profits instead of losses. The auditor never detected this. The corporation’s stock drops 95 percent and bond covenants related to ...

chemistry
calculate how much strontium fluoride will dissolve in 1L of water given Ksp= 2.5x10^-9 at 25 degree celsius

math
After several drinks, a person has a blood alcohol level of 220 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 4 hours

Chem, HELP plz
Complete and balance the following reaction, given that elemental rubidium reacts with elemental sulfur to form Rb2S?

Chemistry
thanks!

Chemistry
A sample of O2 (g) occupies a volume of 3.0 L at 700 mmHg, calculate its volume at 375mmHg.

Chemistry
A gas consists of a collection of small particles traveling in straight-line motion and obeying Newton's Laws. The molecules in a gas occupy no volume (that is, they are points). Collisions between molecules are perfectly elastic (that is, no energy is gained or lost durin...

Chemistry
Give the major ideas of the kinetic molecular theory.

Chemistry
thank you

Chemistry
Convert from 5.6 moles of Cl2 (g) to liters at STP

Chemistry
thank you!

Chemistry
Explain what causes pressure in a container.

Chemistry
What happens to the volume of a latex balloon when it flies to high altitudes (assuming temperature is somewhat constant)?

Chemistry
thank you!

Chemistry
Using the ideas of the kinetic molecular theory, explain why it would be very dangerous to put a can of hairspray in a hot oven.

Chemistry
thank you so much!

Chemistry
Describe the density and compressibility of solids versus liquids and gases.

Chemistry
thanks!

Chemistry
given 9.5 g of KBr (molar mass is 119 g/mol) dissolved in water to make a 175 mL solution, what would the molarity be?

Chemistry
thanks a bunch!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) Given 16 g of HCl and 10g Fe react with how many grams of FeCl3 are produced (limiting reactant)?

Chemistry
thank you!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) What is the mole ratio of Fe reacted to FeCl3 produced?

Chemistry
thanks!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) How many liters of H2 would be formed if 200 g of Fe completely reacted with HCl at 40 degrees Celsius and 1.5 atm?

Chemistry
thank you!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) 12.2 grams of Fe reacts with excess of HCl. how many grams of FeCl3 will be produced?

Chemistry
thank you!

Chemistry
a 2.0M solution of Hbr will have what pH?

Chemistry
ooh okay, thank you DrBob222!

Chemistry
HBrO3 has a Ka of 3.6 x 10^-6. What is the pH of a 2.0M solution?

Chemistry
thank you so much!

Chemistry
Propanoic acid has a Ka of 1.3 x 10^-5. What is the % ionization in a 3.0M solution?

Chemistry
thank you!!

Chemistry
The PH of a 1.3M HF solution is 3.18. What % of the acid ionized?

Math
the probability of a team winning is 65%. The team played four games in a row. What is the probability of winning 4 games in a row?

geography
why communities have an interest in the urban growth and decline

college Calculus Help!
i got it, it correct answer is f'(x)=-x^5.

college Calculus Help!
but thanks

college Calculus Help!
what about f ' (x)? i did with (1/6)(x^6-21^6) but its wrong f(x)=∫(21,x) t^5 f'(x)= x^5 i font know

college Calculus Help!
If f(x)= ∫(21,x) t^5 dt then f'(x). my answer was 1/6 (21^6-x^6) it said it's wrong.

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