Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 822

**physics**

A 75.00-g sample of an unknown metal is heated to 52.00°C. It is then placed in a coffee cup calorimeter filled with water. The calorimeter and the water inside have a combined mass of 225.0 g and an overall specific heat of 2.045 J/(gi°C). The initial temperature of t...

**PHYSICS PLEASE HELP QUICKLY**

I assume you are converting between ampere and coulomb/second.

**PHYSICS PLEASE HELP QUICKLY**

1 A = 1 C/s

**Multiple Choice**

2.) 1 A = 1 C/s Question 3.3) 20.7 so around 21 Question 4.4.) I think you need time as well to get this answer for equation V*I*t, but is not then its 24W (Not sure on that though) Question 5.5.) 220 V Question 6.6.) Hint: Voltage can be likened to pressure. Question 7.7) 2.6...

**Steps in Chemistry**

I'm assuming they are asking for a lab experiment process, if so then I think this is what they would want: -Purpose statement -Procedure statement -Data: Such as equations -Conclusion statement

**English**

American realism

**Adam Help**

Simply reduce Si2O4 by dividing both subscripts by 2. That will get you SiO2. Silicon dioxide is held together by double, covalent bonds. Si(s)+ 2O(g)=SiO2

**Chemistry**

2 K3PO4 (aq) + 3 MgCl2 (aq) → Mg3(PO4)2 (s) & 6 KCl (aq) Net Ionic 2(PO4)-3 (aq) + 3 Mg+2 (aq) → Mg3(PO4)2 (s)

**Multiple Choice HELP!**

Only bromine. You have to write electron configuration: [Br]:1s^22s^22p^63s^23p^63d^{10}4s^24p^5

**Multiple Choice HELP!**

Phosphorus has three electrons in its 3p sublevel

**Physics**

So "MathMate" you're saying that the equation I should use is the following: A) 1/2 * 400 #/in * 1.75"^2 = 612.5 lbs B) 1/2 * 600 #/in * 1.75"^2 = 918.75 lbs There is no subtraction between the two? for part b, I need the length of the spring not lbs...

**physics**

3813.75 Joules of work is being done on a 150 lb object while it is moved 75 ft across a horizontal plane, what is the final velocity if the coefficient of kinetic friction is 0.25 and the initial velocity is 1 ft / s?

**science**

dissecting microscope

**english**

What does plagiarize mean,by the way I'm in year 8 and I am 12

**english**

I need to make a alternative cover and blurb for the book skellig, I have already done the corve I am stuck on the blurb. Help!!

**Biology please help**

I have a project due tomorrow and i cant find a good place to start. Cardiacmuscle disease is a disease that is a result of the cytoskeleton not functioning properly. I cant find anything on cardiac muscle disease. THIS IS NOT CARDIOMYOPATHY

**science**

Im researching a disease caused by a cellular organelle that does not function properly. My topic is "cardiamuscle disease" and its organelle is the cytoskeleton. Ive searched google but cant seem to find a website to help me begin

**health **

Cosmetic surgery is more likely to lead to disappointment if a person is ________. A. Seeking surgery with the hope of influencing a change in oneself B. Seeking surgery with the hope of influencing a change in someone else C. Seeking surgery with the hope of influencing a phy...

**math**

thank you thank you thank you soooooooo much

**math**

so 7134 divided by 82 should be 7200 divided by 80

**math**

+i think i got it i should divide 4000 by 10 am i correct

**math**

i rounded 4312 to 4000 then i divided by 6 is that correct

**math**

666 and 87

**math**

estimate the value of a)4312 divided by 6 and b) 7134 divided by 82

**Math**

estimate 4825 x 63

**math**

how did you get 22,000

**math**

estimate the value of 3268 x 7

**math**

express 8 divided by 12 as a frction

**math**

Danny bought 6 packets of drink. Each packet contained 1/4 liter of drink. Find the total amount of drinks in liters.

**statistics**

Canadians are becoming more conscious of the importance of good nutrition, and some researchers believe that we may be altering our diets to include less red meat and more fruits and vegetables. To test this theory, a researcher decides to select hospital nutritional records f...

**Physical Science**

X-rays can take pictures of your bones but visible light cannot. Explain why. Homework question, please and thank you!

**maths**

I need 1 more Ms. Sue

**maths**

Thanks Ms. Sue!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

**maths**

What 4 fractions are the same as 2/9?

**Math**

an ice cream parlor is giving away free icecream sundaes on opening day. the sundaes are assembled randomly from 7 types of ice cream, 2 types of sauce, and 5 kinds of toppings. find the probabilty.

**Math**

If Mike spends 1/6 of his study time on his science test, and his study time is 2/3 of all of his time, then you divide 1/6 by 2/3 to find that Mike spent (1/6)*(3/2)=3/12=1/4 of his time on Tuesday studying for the science test.

**Science**

Some gardening books tell people to water their plants during the morning or the evening instead of during the sunniest , hottest part of the day . Why do you think books say this

**Physics D **

A 1500-kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 13.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision? 1. what is the degree north of east? 2. how was do they move after the collision...

**Question help**

I think this is C what you think?

**US History**

2. Explain how trusts, pools, holding companies, and communities of interest work to reduce competition and to introduce 'economies of scale.'

**Physics**

A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate t...

**English **

Rewrite the sentences using nouns to replace the phrases in italics. Example: She writes books for a living. She is a writer. 1. Emma loves being a mother. .................................... 2. Having friends is the most important thing for Pepe. ...............................

**Physical Science**

3. Radioactive decay of nuclei often involves several decays before a stable nucleus is formed. This is called a decay chain. What stable isotope is formed when radon-222 undergoes a decay chain of four alpha decays followed by four beta decays? (A) tungsten-206 (B) platinum-2...

**Check my answers 6 ?s- Physics**

All right besides Question 6) 21 N Question 7) 2,800 N

**english**

not sure what the difference between a simple subject, simple predicate, complete subject and a complete predicate are

**Chemistry**

For the following reaction, identify the substance oxidized, reduced and the oxidizing and reducing agents. 2SO2 + O2 ----> 2SO3

**Physics**

An airplane at 410 miles per hour at 40 degrees east of south is blown off course by a wind of 50 miles per hour at 25 degrees east of south. Find the resultant speed of the airplane.

**Physics**

Use the equation for acceleration to determine the acceleration for the following motion. Time(s) 0 1 2 3 4 Velocity(m/s) 0 2 4 6 8

**Chemistry Plz Help**

Calculate the correct boiling point for nitrobenzene. Assume that a total immersion thermometer was used. The obs. boiling point was 205 degree celsius. The reflux ring in the test tube just reached up to the 0 degree celsius mark on the thermometer. A second thermometer suspe...

**Chemistry**

If aqueous hydroﬂuoric acid is reacted with sodium hydroxide, which of the following substances are in the net ionic equation? 1. hydroﬂuoric acid, hydroxide ion, hydronium ion, ﬂuoride ion, and water 2. hydroﬂuoric acid, sodium ion, hydroxide ion, ...

**Physics**

A golfer takes two putts to get his ball into the hole once he is on the green. The ﬁrst putt displaces the ball 9.6 m east, and the second 2.59 m south. What displacement would have been needed to get the ball into the hole on the ﬁrst putt? Answer in units of m...

**Physics**

Janet jumps oﬀ a high diving platform with a horizontal velocity of 2.23 m/s and lands in the water 1.7 s later. How high is the platform? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m

**English**

I'm embarrassed I can't figure this out on my own but I can't so here I am. I was giving these words and told to put them in " Letter by Letter Alphabetization " I'm confused by this and don't know how to figure out which word goes first and why. ...

**chemistry**

What is the empirical formula of a compound that is 14 g calcium, 11 g oxygen, and 0.7 g hydrogen? A. CaO2H B. Ca2OH2 C. CaOH D. Ca(OH)2

**chemistry question**

What mass of propane (C3H8) is needed to produce 346 g carbon dioxide in the following reaction? C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(g) A. 346 g C3H8 B. 115 g C3H8 C. 5075 g C3H8 D. 1.86 g C3H8

**Chemistry**

You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.180 M sodium benzoate How much of each solution should be mixed to prepare this buffer?

**help please**

what is the answer

**help please**

so what is the question, becacuse, when someone else was asking you before you said A is wrong and you think its B

**chemistry**

How many mL of 0.109 M Na2CO3 would be needed to precipitate all of the copper ions in 26.7 mL of 0.159 M CuSO4?

**Boolean expression Help asap PLEASE**

A control system is needed to alert an attendant for the following situation. Which of the following is the Boolean equation expressing the electronics you would need? Either the tank is filled and the pump is on, or the tank is empty. (Use A = tank filled, B = pump on, X = ou...

**Boolean expression Help asap PLEASE**

Thinking in terms of a gate, how would you keep open a two-input AND gate? In other words, what should one of the lines be held at to allow the other signal line to propagate through?

**Boolean expression Help asap PLEASE **

Thinking in terms of a gate, how would you keep open a two-input OR gate? In other words, what should one of the lines be held at to allow the other signal line to propagate through?

**microprocessors **

The value 000001112 is sent to Port B of an Eblock system where an LED module is connected. Which LEDs are on?

**modules**

What are some of the safety considerations when installing or maintaining PLCs? What is a proper grounding?

**modules **

For what control problems do we need to use analog modules or HMI devices

**power dissipation please help **

A diode carries 20 mA with a 2.0 V forward voltage drop. What is the power dissipation?

**transformers **

A resistive load of 2 k is connected across the secondary windings of a 25:1 transformer. If the primary voltage is 50 V AC, what will be the secondary current? im getting 2mA but the correct answer is 1 mA please help

**Amplifiers**

An op amp has a maximum output voltage swing of 10 Vpp and a voltage gain of 100. What is the largest peak to peak input signal that can be applied to the input without clipping the output signal?

**Amplifiers**

Thank you for your help

**Amplifiers**

A common collector amplifier without a bypass capacitor has RE = 1.5 kohms and RC = 2.1 k ohms and r'e = 17 ohms. The voltage gain is approximately

**physics Elena please verify **

If the resistance between the center and the outer terminal on a 20 k ohm potentiometer reads 12 k ohms, the resistance between the center terminal and the other outer terminal is i have 12kohms

**Phyics help please varify the answer is correct**

thank you

**Phyics help please varify the answer is correct **

A parallel circuit has value of RT = R1 // R2 // R3. If one resistor opens, RT RT increases?

**physics please need help**

thanks Elena ive got the same answer. i hate it when the applied answer isn't listed 18.4° -18.4° 26.6° -26.6° *None of the above

**physics please need help **

A parallel RL circuit has a reactance of 250 W and a resistance of 125 W. The phase angle of the circuit impedance is

**Mathematics Ms Sue help**

thank you for all your help!

**Mathematics Ms Sue help**

A high pass filter with a cutoff frequency of 250 kHz is placed in a circuit after a low pass filter with a cutoff frequency of 150 kHz. Together, these filters create which type of filter?

**physics please need help **

If the period of an AC sine wave is 180 ms, the frequency is

**Phyics please help ms sue**

Thank you Elena, you are a big help.

**Phyics please help ms sue**

thank you for answering my question. i need to find out why it is only outputing 100mA current only 100 W resistor is open. 100 W resistor is shorted. 35 W resistor is shorted. 55 W resistor is shorted.

**Physics**

Thank you. hmm...in my book it had me multiply

**Physics **

Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.

**circuits**

Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.

**circuits**

i've tried total impedance formula sq root Xs^2+r^2= but i believe its isn't correct

**circuits **

If a series RLC circuit has R = 25 ohm, XL = 50 ohms, and XC = 30 ohms, what will be the total impedance?

**circuits**

A string of five series resistors is connected across a 20 v battery. Zero volts are measured across all the resistors except the second one. What can be wrong with this circuit?

**electronics**

At the critical frequency, the output of a filter is down from its maximum by

**power dissipation**

thanks got it now

**power dissipation **

What is the power dissipated by resistor R1 of the following circuit: two batteries in series (with values V1 = 20 volts and V2 = 20 volts) connected across three resistors in series with values R1 = 10k, R2 = 10k, and R3 = 20k im getting the answer 4 but i know its wrong. ple...

**Chemistry**

Oxygen gas and hydrogen gas are used to synthesize dihydrogen monoxide. A lab group utilizes 1.00 liters of oxygen and 1.01 liters of hydrogen to create 0.75 grams of product. How many milliliters of product should the group have expected to get? What will the [H+] concentrati...

**Applied Physics **

An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assuming the river has a uniform depth, how deep is the river directly below the boat?

**Mathematics Ms Sue help**

thanks

**Mathematics Ms Sue help **

How many calories of heat must be added to 455 g of steel to raise its temperature from 20 °C to 192 °C? (Note: csteel = 0.115 cal./g. °C.)

**Mathematics Ms Sue help**

thanks for all you guys helps. drawing shows a better concept then straight digging it thanks

**Mathematics Ms Sue help**

sorry for the repost. thanks for all your help you provide everybody on the daily

**Ms Sue help**

An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assuming the river has a uniform depth, how deep is the river directly below the boat?

**Mathematics Ms Sue help **

You want to estimate the height of the Empire State Building. You start at its base and walk 15 m away. Then you approximate the angle from the ground at that point to the top to be 88 degrees. How tall do you estimate the Empire State Building to be?

**science**

Discuss the relationship between motion and force including the following terms: velocity, acceleration, equilibrium, contact force, and field force.

**physics**

Discuss the relationship between motion and force including the following terms: velocity, acceleration, equilibrium, contact force, and field force.

**Quantum/inorganic chemistry**

c. Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3

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