Total # Posts: 1,088

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

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 = ...

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?

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

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

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

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

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

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?

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

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.

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

Yes, thank you. I worked it out, after a few minutes. Anyway, thank's a lot :)

Not really helping much. A slightly worked example would be effective. But thanks anyway.

2) An aircraft lands on a runway at a speed of 40 meters per second (ms^-1) and brakes to a halt in a distance of 860m. Calculate a) The Braking time. B) The deceleration of the aircraft.

Physics
A 70 kg person stands on a 30 kg platform and pulls on a massless rope with a force of 400 N. The rope passes around a pulley attached to a support (roof), and then around a second pulley attached to the platform before being anchored to the support (roof). All sections of the...

physics
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner?

Statistics
Lol mate. This question is too long to be answered by us. Do it yourself, this is college level stuff.

Physics
What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

Programing using Raptor ( Computer Logic)
Create a program that determine the shipping cost for an order based on the following table: From \$0.00 \$20.00 \$50.00 \$75.00 To \$19.99 \$49.99 \$79.99 \$1000.00 Price \$2.95 \$3.95 \$4.95 Free

CHM
How to balance the following equation: Na(s) + H2O(l) yields?

physics
Since momentum is conserved vf=1.3044

Trig
Suppose you would like to cross a 200-foot wide river in a boat. Assume that the boat can travel 35 mph relative to the water and that the current is flowing west at the rate of 5 mph. What bearing should be chosen so that the boat will land at a point exactly across from its ...

Trig
Suppose you would like to cross a 209-foot wide river in a boat. Assume that the boat can travel 32 mph relative to the water and that the current is flowing west at the rate of 6 mph. If the bearing chosen is chosen so that the boat will land at a point exactly across from ...

math
A solar home contains 3.50 multiplied by 105 kg of concrete (specific heat = 1.00 kJ/kg·K). How much heat is given off by the concrete when it cools from 29 to 20°C?

Physics
(a) Suppose that on the moon an astronaut hit a golf ball so that it left his club at a speed of 45ms-1, at an angle of 20degrees to the horizontal. calculate the time of flight of the ball. (b) calculate the horizontal distance travelled by the ball before landing

Calculus 1
differentiate f(x)=(1+sinˆ2x)ˆ6

Calculus 1
differentiate f(x)=(sinˆ2x)/(cosx)

CHM
freezing point of cyclohexane...yes I am using the depression of freezing point method

CHM
Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high, too low or unaffected? Explain. Please someone explain this to me I don't understand it...Thank you

Math
Given the following statistical list: 13,17,19,22,25,27,29,29,32,and 33. Assuming a desired "Confidence Level" of 95%, find the confidence interval for the above scores. 19.8 < u(mean)< 29.4 14.6 < u < 33 13.4 < u < 22.7 11.1 < u < 18.5 I have...

physics
A 140-W heater was placed in 2.00 kg of methanol and turned on for exactly 1 min. The temperature increased by 3.54°C. Assuming that all the heat is absorbed by the methanol, calculate the molar heat capacity of methanol.

Chemistry
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL sample of the 1.00 L solution was reacted with excess AgNO3 and 0....

Math
A diver is working 10 feet below the surface of the water. The gap between the water and the deck of his support barge is 1/8 of the total length of the air hose and 2/3 of the total length remains on the reel. What is is maximum working depth?

25, base 5

Physics
a) The horizontal component of any velocity remains constant as it goes through the air, so the horizontal component of the initial velocity would still be 8.8i. The distance can be calculated using the formula Xf=Vx*t: Xf=8.8*2.7=23.76 b)Maximum height is given by the formula...

math
first you need to set it equal to zero 3x^2-48=0 then we factor we can pull the 3 out becasue 3 goes into 48 and 3x^2 so we would get something like this 3(x^2-16)

Maths
A garage bought 55000 litres of petrol for 86 pence a litre and sold it for 96 pence a litre calculate how much garage paid for petrol.

Health
D is incorect I put it on my test was wrong

health!

HEALTH
of Course I mean A !!

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