Answers by visitors named: charlie

"My reasoning is that 'undoing' the derivative gives me the derivative." oops, meant to write ......gives me the integral.

Thanks- that was quick! Therefore, given my scenario, I could use the integral to calculate the area under the curve described by the derivative? Charlie.

Great, and thank you very much. Charlie.

Thanks bob, and thanks to drwls too, in the earlier ones. Charlie.

which is correct?"What a disaster,"shouted Maria. "What a disaster!"shouted Maria!

Thank you very much

what is the rest of the problem?

Sorry Bob, The wave represents a simple pendulum. In 3, I'm referring to the equation x(t)=Asin(wt+(greek letter phi)), so was looking to confirm that in that specific circumstance I outlined, the value of phi would either be zero or pi (as in 22/7). Thanks.

Thanks very much, I appreciate it.

Yes, it's zero. That seems to make the second term (m2u2) zero, but I still get what i think is the correct answer. What should be my next approach?

Thanks both, for the answers.

Thanks Damon, I realise I didn't tell you what i'm asked to do! I note your point about the start point for the equation. Thanks

Thank you both.

Spotted! Thanks Dr Bob.

It's given that it is an ideal fluid, and I'm asked to explain the significance of the expressions. I se a relationship with 1/2mv squared and mgh, but can't explain it clearly.

Thanks, all 3.

Sorry, the field is said to be constant around the central segment pq, which is only 10 cm long.

that's 3x10^6, not -6

I get it. My text shows your formula, but recommends 1/R= 1/R1+1/R2 etc as easier! I'm with you. If the numbers match, is my thinking ok?

I forgot to say "take the reciprocal". Does that make more sense?

Very kind drwls, thanks a lot. Charlie

Thanks (I'm not much wiser!), but what's ve as in 'between ve and zero' please?

Thanks Jessica

Thanks drwls, for that. However, the question acually asks me 2 things: the total M; and to find the length of the microscope! The questioner clearly thinks I have enough info to go on from what I've given above. Charlie

If I had made it conditional that the electron was orbiting at a constant radius, would it then be correct; and would it also be accurate in 'ordinary' situations, eg spinning a stone around on a string?

Thanks, CI

HELP! Time running out! Thanks

Thank you for giving such a detailed answer.

Thank you very much.

Thanks for that.

Thanks

Thanks for that. So it would take longer to stop then?

this is the quesion List four things to look for when you’re proofreading?

Thanks Reiny, Yes, I spotted that it dosen't work for any run of primes, but it does up to 9. I'm afraid i don't really follow your explanation! An answer for dummies maybe? Charlie

Sorry Reiny, The question is 11-6/7-7 I thought the answer was 5/0= undefined. Can you please let me know if I am wrong and show the work so I can further understand your answer. Thanks Reiny

let me retype the question. Sorry for the scribble. 1/2 X 1/2 answer in simplest form. must show work. thanks

There are multiple choices for the answer to this problem. They are a) 1/5 b) undefined c) 5 d) 5/7 Thanks again for both of your help

the passenger's weight is ALWAYS mass x acceleration. Can you work out the acceleration at all 3 stages? The mass of the person is the same for all 3.

whats is the boiling point of a solution composed of 17.6g of urea in (NH2)2CO in .300 kg of water

Thanks Drwls, but that's the press release I spotted the error in. I think!

A landslide may be caused when friction is ______ by moisture

sorry that was 188 that i got

so does the ball clear by 1 m or does the ball not clear the crossbar and misses it by 1 m.

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiissssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss WAR.

Thanks very much

That idea of "omni directional" kind of confused me also... I would guess that it can be assumed as just a regular wave?

Weight is Mass (m) x acceleration due to gravity (g). W=mg So,to get back to mass, divde the weight by g. 84.5/9.81= ?kg Now adjust the value for g for when the elevator is going up or down (add or subtract the elevator velocity)and multiply it by the mass you calculated. When the elevator is in constant motion (not accelerating) the scale should show 84.5kg.

Hint: what speed was the coin doing along the ground before you threw it?

What do you know? Initial velocity 5 m/s Time 6s Displacement (distance, not quite the same)60m Look at the standard motion equations, see if you can find one that uses all of these to give acceleration. Then use v=u+at.

Assuming air resistance is negligible.

Drwls Could it also be solved by using v=u+at for the upward throw;then another motion equation for the upward distance; added to the fall time (sqrt 2h/g) all the way to the bottom? Charlie

The ball's horizontal and vertical components are independent of each other. The 11m per sec makes no difference to your calculation. You know the starting vertical vel( 0m per sec); the time,(4.8sec) and the acceletation (g). Use v=u+at to get the velocity at 4.8 sec, then find an equation with all those, and distance in. solve for distance.

Multiply EVERY term in the second bracket by -x; then do the same with the -1. Gather all the like terms together: all the exponents, then all the x terms and then all the numbers.

what is the value of 200 dimes? Subtract the answer from $28.10. How many quarters in your answer?

c=f*lambda, or the speed of light =the frequency x the wavelength. Solve for wavelength, and remember to divide by 4 for a quarter.

Initial velocity is given, final velocity is given, and the time is given. Using these, rearrange v=u+at to solve for a. The ball is slower after the bounce, so what sign will the acceleration be?

a) use v=u +at solve for a b) use v^2=u^2+2as solve for s. v is final vel; u is initial vel; t is time and a is accel. S is displacement; or distance in this case.

Hor vel= 300cos55 Mult this by 42s to get the horizontal (x) distance. (42s btw is a bit ridiculous, but hey ho)

Assuming the 'passing the window'part means 0.10s to go from the top to the bottom of the window... Then the veocity will be 1.18/0.1, so 11.8m/s. Accel will be that of 'g', so 9.8 m/s^2; and the initial velocity was 0 m/s. Use v^2=u^2+2as Solve for s, which will be the height it has fallen.

V^2=u^2+2as. v= the final velocity; u=the initial velocity (9.2 m/s; a is accel and s is distance (more accutately, displacement). Solve for v.

The ball goes 120m in time t. t, or fall time, is sqrt of 2h/g, both given. 120/t gives the x component of velocity in m/s.

Picture a right angled triangle with one side AB being 25 x 125 metres long to the west; the other side BC being 19 x 66 metres long to the south. The displacement is the length of the hypotenuse AC; the direction being between 180 degrees and west. Sketch it out, then do the trig.

Force = Massx acceleration. Find the accel using v=u+at, solving for a. v is the final velocity (0); u is the initial (9.4), t is time (0.2) Then x by 110 kg. to get the force in Newtons.

Eric, I'm not sure what you need, but if it's Physics tuition (or Math)try Khan Academy. Hundreds of short vids. Hope Jiskha don't mind this post.

Initial velocity, (u), is given, so is acceleration, (g), so is the distance (s), 28.4m. Use v^2=u^2+2as and solve for v.

Calculate the amperage of the lights: watts/volts= Amps. Then divide the battery's capacity by the answer.

true

a and b are obove 1. The rest are between 1. answer A and B

what's the answer?

whats the answer?

55g

Damon's post is correct.

more it it thani

do you know the rest of the answers for this quiz?

do you have the answers to this

i check one for number 2. theres starts at the end of questions too

number 5 Sacramento, California ?? number 6 gold?

number 5 is Promontory, Utah. number 6 would be coal

8. How did Native Americans and whites differ in their views on land use? * Native Americans saw themselves as part of nature and considered it sacred, while whites saw it as a natural resource used to produce wealth. Indian cultures had no regard for preserving land and were wasteful, while white settlers sought to preserve the land and keep it as natural as possible. Whites believed the land was sacred and fundamental to their religious beliefs. not sure about this one can you help me figure it out?

sorry let me put my answers, i put the wrong one.

1. The policy by which strong nations extend their control and influence over weaker territories is called? Socialism Imperialism * Populism 2. This theory justified the use of racial, national and cultural superiority that nations used to build their empires? Populism * Social Darwinism White man's burden 3. All of the following were causes of the Spanish-American War EXCEPT? Cuban war for independence (1895) Yellow Journalism * Sinking of the USS Maine Push for isolationism within America 5. The Treaty of Paris (1898) officially ended the Spanish-American War and gave the territories of Guam, Cuba, and Puerto Rico to the United States. True or False? True False * 6. Filipino guerrillas resisted against American occupation of the Philippines for which of the following reasons? They wanted to remain a part of the Spanish empire due to the positive benefits associated to their membership. They fought alongside American soldiers during the Spanish-American War and hoped to gain independence as a result of their efforts. * Filipino children were being removed from the Philippines and brought to the United States for education and the guerrillas wanted them to remain in their homeland. 7. Which of the following was a direct result of John Hay's Open Door Policy? the Boxer Rebellion the Bombing of Pearl Harbor Soviet invasion of Manchuria * 8. The Gentlemen's Agreement was negotiated between which two nations? France and Great Britain United States and Japan * North Korea and South Korea 9. The acquisition of the Panama Canal zone was an example of Roosevelt's "Big Stick Diplomacy." True* or False

Thanks for the reading suggestion Damon, ill be sure to read it.

i didn't repost them.. i got it now

No choices, this is study material for a project that's due next week, these are questions to help me study for it.

I had no assigned materials Ms sue, This was it, i was told to research it and figure it out. i just needed a little bit of help. Thank you reed for your help!

solving a natural log

0.33

weiners

19.5

wood

Thank you for your quick response. It is very clear. Charlie

The card was originally $1. Please help find the effective yield

What do you do for the last part

that makes no f*ing sense someone probably deleted the answer

it was c

appropriate metric unit of mass for concrete in a section of sidewalk.

The answer would be 5. C F, because these two atoms have the largest difference in electronegativity.

117%

please hwo does this work i need the woring out to understnad

is that the correct answer? thanks.