# Posts by Adam

Total # Posts: 1,115

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...

s = 4 sin(?t) + 3 cos(?t)

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 ...

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-...

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 ...

chemistry
4.44 x 10^-4

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, ...

math
3 cats 18 dogs

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?

Chemistry
I got the correct answer on this problem. The problem you are having is with the partial pressures. You have .400 mol H38Cl at the start. The 38Cl undergoes 2 half lives to .100 mol. So now in the solution you have left .100 mol of H38Cl. The H gas that falls off of this would...

solubility
4.88*10^7

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?

I got every single one wrong Sue

so what is the answer to 7? i'm confused by the link

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 = ...

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

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
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

Thank you Elena, you are a big help.

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. ...

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+] ...

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

Math
A dipole of 1 Debye is equal to 3.33 x 10^-30 C m . Show that in atomic units 1 D = 0.39345 au.

math
For the curve y = log(x+3) determine the following: a) asymptotes, if any. b) intercepts, if any. c) domain and range

math
thanks!

math
Another: theta is a second quadrant angle in standard position and tan theta = - (sqrt5)/(2) . Find the exact value of cos theta. I assume I use the equation 1 / cos(theta)^2 = 1 + tan (theta)^2 However how does this work out algebraically?

math
Another: theta is a second quadrant angle in standard position and tan theta = - (sqrt5)/(2) . Find the exact value of cos theta.

math
theta is a first quadrant angle in standard position and cos theta = 1/(sqrt10) . Find the exact value of sin theta,

math
Why do we write radian measures with a π rather than just give the decimal equivalent? (for example, why not use 1.88 rad instead of 3π/5 rad?) Thx

math
Why do we write radian measures with a π rather than just give the decimal equivalent? (for example, why not use 1.88 rad instead of 3π/5 rad?) Thx

math
thanks

math
imgur[dot]com/jpORgtf This is wayy to hard to type. What is the simplification of this question. Thanks.

physic -shm
a bob of pendulum is filled with water and small hole is made on the tip,and it is moved .how will the time period change?

math
and btw 3^2 = 25 is typo

math
fantastic, makes so much sense now, thx

math
Hello, Is log_3 (5) equal to log_5 (3)? Explain your answer. Do not evaluate the logarithms. is my question. What is a surefire way to show this is false.

Physics
A golf ball with a mass of 50.3 g can be blasted from rest to a speed of 72.1 m/s during impact with a club head. Assume that the impact lasts only about 0.910 ms. Calculate the change in momentum of the ball. Calculate the average force applied.

Answer to number 3
it is B

Physics
A sled rope is held at an angle of 45 degrees with the horizontal ground. A force of 60 N acting parallel to the ground is required to keep the sled in motion. How much force must be exerted on the rope?

physics
After falling from rest from a height of 30 m, a 0.48-kg ball rebounds upward, reaching a height of 20 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?

Quantum chemistry
For the simple harmonic oscillator determine: b. [Tˆ,Vˆ ]

programming
m trying to create an arraylist that's sorted but I have no idea how to sort the numbers. I cant use the array.sort method here is my code: public class Testing { private int [] data; private int count; private static int defCapacity = 10; public Testing (){ count = 0; ...

computer science
Im trying to create an arraylist that's sorted but I have no idea how to sort the numbers. I cant use the array.sort method here is my code: public class Testing { private int [] data; private int count; private static int defCapacity = 10; public Testing (){ count = 0; ...

chemistry
A 0.10-mol sample of H2(g) and a 0.10-mol sample of Br2(g) are placed in a 2.0-L container. The reaction H2(g) + Br2(g) <----> 2 HBr(g) is then allowed to come to equilibrium. A 0.20 mol sample of HBr is placed into a second 2.0-L sealed container at the same temperature...

Chemistry
A ==> B + C A is (s) and not included in Kc 1.2 + 1.2 = 2.4 4.00 - 2.4 = 1.6 mol left

Physics
The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is 0.2e and on the indicated C and O atoms is 0.4e. ...

math
the largest value of n for which 10^n evenly divides 2^9*15^2*35 is a)2 b)3 c)4 d)5 e)6

Physics (As Level) 12 Grade
Yes, thank you. I worked it out, after a few minutes. Anyway, thank's a lot :)

Physics (As Level) 12 Grade
Not really helping much. A slightly worked example would be effective. But thanks anyway.

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