Friday

December 2, 2016
Total # Posts: 2,390

**physics**

If the magnitude of the electric field in air exceeds roughly 3 106 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 49 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (...

*February 10, 2012*

**physics**

a spherical gaussian surface of rdius R surrounds a point charge of magnitude +Q. How does the flux through the spherical surface change if the sign of the charge is reversed and the Gaussian sphere is doubled?

*February 10, 2012*

**GEOMETRY**

Is it true that vertical angles must be oriented north-south?

*February 9, 2012*

**math**

john brought a new aquarium. How many gallons of water will john need to fill the tank three quarters of the way full? the tank is 12 inches tall and 19.25 long [1 gallon = 231 cubic inches] the tank is square

*February 9, 2012*

**chemistry**

How many electrons are in the highest occupied energy level of these atoms? Na(sodium) Al (aluminum) F(fluorine) C(carbon)

*February 8, 2012*

**Physics**

if the tangential speed of a ball is 1.2874 . what is the centripetal force ? If the maximum tension the rope can withstand before breaking is 159.9 N, what is the maximum tangential speed the ball can have? Answer in units of m/s

*February 7, 2012*

**BIOLOGY**

Predict which would diffuse faster, briefly explain why. a. Methylene blue or KMnO4 with the same concentration b. 1.0M vs 0.1 M methylene blue solution c. KMnO4 at 0oC and 100oC

*February 2, 2012*

**Geometry**

If x<15, then 5x <75 name the property of inequality

*February 2, 2012*

**Physics**

A hot-air balloon is rising upward with a constant speed of 2.50 m/s. When the balloon is 3.00 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

*February 1, 2012*

**Math- Algebra**

Write the expression in math symbols: the sum of m squared and 8

*January 31, 2012*

**General Physics Pt.2**

A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?

*January 29, 2012*

**prealgebra**

between which w consecutive numbers would you find the square root of 82

*January 28, 2012*

**Trigonometry**

Find the remaining trigonometric ratios of θ if sin(θ) is given and θ QI sin(θ)=7/sqrt 149 cos= tan= cot= csc= sec=

*January 27, 2012*

**physics**

How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W

*January 23, 2012*

**Science**

Assuming energy is conserved, gravitational potential energy and kinetic energy 'swap' during a fall, and the numeric values transfer. I would say the answer is 180 - 135 = 45J Kinetic energy = 45J

*January 19, 2012*

**algebra**

The length of a rectangle is 5 inches longer than its width. Its perimeter is 45 inches. Let w equal the width of the rectangle. Write an expression for the length in terms of the width. Use expressions for the length and width to write an equation for the perimeter, on the ...

*January 19, 2012*

**psy/300**

How does sensation and perception affect learning?

*January 19, 2012*

**physics**

find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.

*January 18, 2012*

**physics 2014**

An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 23.0° south of west. The second aircraft is at altitude 1300 m, horizontal distance 17.8 km, and 18.0° south of west. What is the ...

*January 15, 2012*

**Mathematics**

A shopkeeper mixed coffee powder worth $2.50 per kg with coffee powder worth $3.50 per kg, and sold 20 kg of the mixture at $2.80 per kg. Find the weights of the 2 grades of coffee powder that he mixed together. Explain clearly your steps of solving it.

*January 15, 2012*

**psy/300**

how does sensation and perception affect learning?

*January 14, 2012*

**algebra**

Thanks so much for your help!!

*January 12, 2012*

**algebra**

if one bus stops at the library every 60 minutes, and the other bus stops at the library every 45 minutes, how long will it take for both buses to be at the library at the same time?

*January 12, 2012*

**math**

Bob sets two alarm clocks (battery-powered) to be sure he arises for his Monday 8:00 A.M. accounting exam. There is a 75 percent chance that either clock will wake Bob. (a) What is the probability that Bob will oversleep? (b) If Bob had three clocks, would he have a 99 percent...

*January 8, 2012*

**Math**

Given P(A) = .70, P(B) = .30, and P(A ∩ B) = .00, find (a) P(A ∪ B) and (b) P(A | B). (c) Sketch a Venn diagram and describe it in words

*January 8, 2012*

**Math**

Solve for x: 5x−5>10x+6

*December 31, 2011*

**Math**

It took mike 2 2/5 hours to drive home. His sister drove same distance in 3/8 of mikes time how long did the drive take mikes sister?

*December 30, 2011*

**Math**

It took mike 2 2/5 hours to drive home. His sister drove same distance in 3/8 of mikes time how long did the drive take mikes sister?

*December 30, 2011*

**Math**

Thanks

*December 30, 2011*

**Math**

Put these numbers from least to greatest. -21, 60, -62, 9

*December 30, 2011*

**algebra**

WHAT DO YOU CALL A DUCK THAT STEALS?

*December 19, 2011*

**pre calculus**

Use properties of logarithms to find the exact value of the expression log_7 (343 * 7^15)

*December 17, 2011*

**pre calculus**

Thank you!

*December 17, 2011*

**pre calculus**

Write the expression below as a single logarithm. Need to know how to work this! ln(x-5/x^2 - 1) - ln (x^2 - 2x -15/x + 1)

*December 17, 2011*

**geometry**

Suppose CED = DBC. If m<EDC=63 degrees and m<DBC=82 degrees, what is m<DCE? Possible answers are 63, 82,145 or 35 degrees. GHF = LJK by HL? if so state all of the congruent parts that allow the use of HL. Possible answers Yes, <G= <L, GH=LJ,HF=Jk Yes, <g=<...

*December 11, 2011*

**geometry**

B is the midpoint of AC, D is the midpoint of CE, and Bd=14. find AE. B is the midpoint of AC, D is the midpoint of CE and BD=7. Find AE.

*December 11, 2011*

**precalulus**

use the intermediate value theorem to show that f(x) has a zero in the given interval. f(x) = -x^5 -2x^4 + 5x^3 + 4; [-0.9, -0.8] Stuck!

*December 9, 2011*

**Physics**

Entire esrth

*December 9, 2011*

**Chemistry**

how many moles of chlorine gas are required to react with 164 g of Br

*December 5, 2011*

**earth**

Rocks that become hot enough to melt and flow are referred to as ___ by scientists

*December 4, 2011*

**stats**

using a calculator need p value on a r tailed test if the n=9 and the t is 3.204

*December 2, 2011*

**math**

4 1/2

*November 30, 2011*

**math**

6 x 3/4 =

*November 30, 2011*

**math**

3/5 + 6 2/3 =

*November 29, 2011*

**chemistry**

What mass of calcium carbonate is precipitated out when 2.20 g of ammonium carbonate is added to 25.7 mL of a 4.00 M solution of calcium nitrate?

*November 29, 2011*

**V/CV OR VC/V PATTERN**

is tyrant a v/cv pattern or a vc/v pattern

*November 29, 2011*

**English**

web sites.

*November 29, 2011*

**Spanish**

I think I was suppose to put "A mí" in front of each of the responses, correct?

*November 25, 2011*

**Spanish**

I was asking if I said those parts correctly-

*November 25, 2011*

**Spanish**

I had to post the rest of my homeowrk here because it kept saying there was something wrong when I tried to put all the questions together Thank you very much for helping

*November 25, 2011*

**Spanish**

Tell which body part hurts after doing the activity 1.Listen to too much music Me duelen las orejas. 2.The exam was difficult.Me duele la cabeza. 3. Sat in the sun for 4 hours Me duele el cuerpo. 4.Talked and drank too much yesterday Me duele la garganta. 5.Escribiste Mucho en...

*November 25, 2011*

**Spanish**

I think I was suppose to put "A mí" in front of each of the me duele/me duelen responses or isn't it required? Thank you

*November 25, 2011*

**Spanish**

I had to tell what body part hurts after doing the following activity 1.watching too much television Me duelen los ojos. 2.Eat too much candy Me duele el estomago. 3. drank too much after I ran Me duelen las piernas y pies y el estomago. 4. I walked ten miles Me duelen las ...

*November 25, 2011*

**math**

Determine the least possible value for B to the nearest tenth if A = 20°, a = 7, and b = 11.

*November 23, 2011*

**math**

The terminal side of an angle theta in standard position coincides with the line 2x – y = 0 in Quadrant III. Find cos theta to the nearest ten-thousandth.

*November 23, 2011*

**math**

Determine the number of possible solutions if A = 48°, a = 5, and b = 6.

*November 23, 2011*

**math**

Find the measure of the reference angle for 235°.

*November 23, 2011*

**math**

Identify the coterminal angle between –360° and 360° for the angle –120°.

*November 23, 2011*

**math**

Give the angle measure represented by 0.5 rotation clockwise.

*November 23, 2011*

**Chemistry**

Find the pH during the titration of 20.00 mL of 0.1000 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54e-5), with 0.1000 M NaOH solution after the following additions of titrant: 0 mL, 14.00 mL, 19.95 mL, 20.00 mL, 20.05 mL, 24.00 mL.

*November 23, 2011*

**physics**

67 joules. Gravitational potential energy becomes kinetic energy when falling.

*November 22, 2011*

**Physics**

X = (V COS?)t = 15*cos30*2 = 25.98

*November 22, 2011*

**Math**

Fan and Dan took part in a 1000 meter competition. When Fan was at the 800 meter mark, Dan was 300 meters away from the finish line. How many meters away from the finish line was Dan when Fan crossed the finish line?

*November 21, 2011*

**chemistry**

a sample of nitrogen gas has a volume of 1.00 l at STP What is the temp in Celsius if the volume is 10.0 L at 2.00 atm * I know to use the combined gas law, and I got the question wrong in my homework assignment, reviewing for a test today please help.

*November 21, 2011*

**broward college**

will result in less people buying the product, a surplus of the product, the company reduces its price and therefore its supply....to make the supply within a closer ratio between supply:demand therefore allowing its company to sell the goods at the base price ...but the ...

*November 20, 2011*

**Math**

1,217 ft^2

*November 20, 2011*

**3rd grade math**

I definitely know the answer to that one, luis. It's probably around 58,007,450 packages of ribbon.

*November 15, 2011*

**Math **

Lalph Rauren was famous for discovering potential models as he walked the streets of New York. One day he spotted four girls who later became top models: Amy, Mary, Kay, and Beth. One was discovered walking through an apartment building, one in a coffee shop, one in a shopping...

*November 10, 2011*

**Geometry**

what is the lateral area of a regular pyramid with a 6 inch width and a 8 inch height

*November 10, 2011*

**physics**

Metallica

*November 9, 2011*

**English**

Please tell me the meaning of the sentence below: "Everyone but 4 people voted for Menu I." Remember tha we hve two menus to choose from. Thanks.

*November 4, 2011*

**Math**

How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

*November 3, 2011*

**Math**

How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

*November 3, 2011*

**ENGLISH**

Due to the large storm approaching, three students, Jamie, Lisa, and I, were allowed to leave early.Pronoun

*November 3, 2011*

**Astronomy**

Explain how you could determine, given the following 3 pieces of information, (you need all 3 together not each one individually) the radius of the Earth. 1) Jakarta and Port Moresby, the capital of Paua New Guinea, are two cities on the equator. 2) A plane leaves from Port ...

*November 2, 2011*

**Astronomy**

How many degrees of longitude does the Sun move in each hour?

*November 2, 2011*

**chemistry**

a solution of lead(2)nitrate is added to hydrochloric acid. A precipitate is formed in a double displacement reaction Question:how to balance this equation problem

*November 1, 2011*

**Finance**

Niles is making an investment with an expected return of 12 percent. If the standard deviation of the return is 4.5 percent, and if Niles is investing $100,000, then what dollar amount is Niles 90 percent sure that he will have at the end of the year? A) $100,000.00 B) $104,...

*October 24, 2011*

**related rates**

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.4 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 8 cm. (Note the answer is a positive number).

*October 24, 2011*

**Finance**

You can earn an expected return of 13 percent compounded semiannually. If you invest $400 today, then you would have $ in 22 years

*October 21, 2011*

**physics**

A generator uses a coil that has 280 turns and a 0.45-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine the length of the wire from which the coil ...

*October 21, 2011*

**Geometry**

Given that ABC XYZ, mA = 40, and mC = 55, find mY.

*October 19, 2011*

**AP physics**

That just confused me more cause it's just asking for Velocity and we haven't talked anything about w or i

*October 18, 2011*

**AP physics**

a 5.7 kg ball rolls over the edge of a 4.4 m tall cliff. If the total mechanical energy of the ball is 890 j at the instant that it goes over the edge, how fast is the ball moving? Not sure how to get V when you know TME.

*October 18, 2011*

**chemistry**

A balloon is filled with 2.2 cm3 helium gas at 132.4 atm pressure. What will be the new pressure (atm) if the volume is changed to 68.6 cm3?

*October 17, 2011*

**chemistry**

A 45.3 cm3 bubble of air at 1 atm pressure is subjected to a new pressure of 4.7 atm. What will be the new volume (cm3)?

*October 17, 2011*

**chemistry**

What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.

*October 17, 2011*

**physics**

you are driving a 2520.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a ...

*October 13, 2011*

**physics**

If a coordinate system is set up such that the positive x axis points in a direction 75° above the horizontal, what should be the angle between the x axis and the y axis?

*October 13, 2011*

**chmistry**

what substance has the density of .60g/ml

*October 11, 2011*

**macroeconomics**

240

*October 11, 2011*

**business entr 101 **

gig started giganeers to earn a profit but by working hard and increasing his market shares , he was able to create jobs for others. this is an example of ________ concept.

*October 4, 2011*

**trig**

if cot 17 degrees = 3.2709, find tan 73 degrees

*October 4, 2011*

**physics**

A block is dropped onto a spring with k = 27 N/m. The block has a speed of 3.2 m/s just before it strikes the spring. If the spring compresses an amount 0.13 m before bringing the block to rest, what is the mass of the block?

*October 2, 2011*

**Physics**

3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...

*September 29, 2011*

**help please :)**

my name is james ana i think you so much for helping me on my quiz love you baby girl

*September 27, 2011*

**jones**

spores are produced in reproductive structure called .

*September 26, 2011*

**business law**

California passed a law prohibiting any transport of nuclear waste in the state unless the company doing so is a resident or is owned by resident of California. What kinds of constitional issues do this raised?

*September 20, 2011*

**Macomb**

Marie Antoinette was negligently injured by Guillotine. Marie is preparing to file a lawsuit against Guillotine in state court for $23,000 damages as compensation for the private wrong that Guillotine committed against her. Which court in Michigan has the power to hear and ...

*September 20, 2011*