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Questions (36)
You hear the sonic boom of a high-speed jet plane exactly 3.10 s after it passes directly overhead in level flight. At the time
1 answer
722 views
A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it
1 answer
603 views
A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it
1 answer
630 views
A harmonic wave moving in the positive x direction has an amplitude of 4.4 cm, a speed of 41.0 cm/s, and a wavelength of 45.0
0 answers
580 views
A harmonic wave moving in the positive x direction has an amplitude of 4.4 cm, a speed of 41.0 cm/s, and a wavelength of 45.0
0 answers
557 views
What is the whole number or simplified answer to 3/35 divided by 9/7
1 answer
424 views
State the number of complex roots of each equation then find the roots.
I cant figure out these two! 1. 3x - 5 =0 2. c^2 + 2c + 1
1 answer
526 views
In a survery, students were asked whether they play basketball or tennis. Of 34 students, 24 play basketball and 13 students
1 answer
581 views
In a survery, students were asked whether they play basketball or tennis. Of 34 students, 24 play basketball and 13 students
1 answer
1,015 views
The Hubble Space Telescope (HST) can resolve objects that have a small
angular separation because there is no atmospheric
3 answers
630 views
I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if
3 answers
587 views
A child swinging on a swing set hears the sound of a whistle that is being blown directly in front
of her. At the bottom of her
2 answers
1,407 views
The length of the auditory canal in humans averages about 2.5 cm. What is the second lowest
standing wave frequency for a pipe of
2 answers
667 views
(a) Write the equation for a transverse sinusoidal wave with a maximum amplitude of 2.5 cm and an angular frequency of 2.9 rad/s
0 answers
668 views
why isnt there any correlation between the monthly rainfall and Ross River Virus?
1 answer
944 views
i need to describe my public identity by drawing. can you please give me some ideas? please? i want to know your public identity
1 answer
400 views
A person is doing leg lifts with 3.0-kg ankle weights. She is sitting in a chair with her legs bent at a right angle initially.
0 answers
1,033 views
this is the question :
A CD has a diameter of 12.0 cm and a mass of 15.8 g. The motor in a CD player causes the disk, initially
0 answers
625 views
A beam of electrons is moving in a horizontal circle in a uniform magnetic field that is directed downward. The speed of the
0 answers
605 views
Find the force on a proton, with kinetic energy 10keV, that is moving perpendicular to a magnetic field of magnitude 2.0kG.
I
0 answers
425 views
A ball player wishes to determine her pitching speed by throwing a ball horizontally from an elevation of 3.0 m above the
1 answer
763 views
A mass of 1.00kg is dropped from a height of 80cm onto a spring, of unstretched length of 20.0cm, which is resting on the floor.
1 answer
524 views
A uniform magnetic field points North; its magnitude is 1.5 T. A proton with kinetic energy 8.0x10–13 J (5.0 MeV) is moving
1 answer
2,647 views
this question is about resistors in parallel.
If i have a circuit, and it starts at point A with one resistor, then splits to
2 answers
519 views
During a “brownout,” which occurs when the power companies cannot
keep up with high demand, the voltage of the household
2 answers
619 views
A 2.00 kg block, on a horizontal surface with coefficient of static friction 0.900, is pushed by a force that is directed down
1 answer
602 views
A copper wire has a resistance of 24 Ω at 20°C. An aluminum wire has three
times the length and twice the radius of the copper
2 answers
1,721 views
i need an urgen help with my eulogy
can someone please help me, please. i cant do some parts properly,and am not sure of some
1 answer
517 views
please please pleeeeeeeeeeeeeeeeeeeeeeeaaaaaase help!
What are the societal influences (economic, education and government
0 answers
845 views
find the equation of the tangent line to y^3-xy=-6 at the point (7,2)
1 answer
430 views
use implicit differentiation to find dy/dx
xlny=y^3=lnx
1 answer
636 views
how many grams of CO will contain 4.10 x 10^12 molecules
0 answers
310 views
how many grams of Sb2S3 will contain 4.80 moles of S
1 answer
686 views
what is the mass of one mole of carbon dioxide?
1 answer
400 views
how many grams of phosphorus are there in 160 g of P4O10
1 answer
562 views
how many moles of CH4 will contain 4.31 x 10^23 molecules
1 answer
371 views
Answers (13)
tan(theta) = opposite/adjacent angle of depression means angle below the horizontal, so draw a triangle tan(32 degrees) = x / 56 meters solve by multiplying tan(32 degrees) by 56 meters IN DEGREE MODE NOT RADIAN
I tried to get help from a friend, but her email just said to use tan theta = x/D. I'm not sure why she said to use tan theta, and when I do that-> tan 0.00001165*2.4m=x I get x= 0.000000487 which is obviously not right.
My prof says that the answer should be of magnitude 10^19. I'm not sure what he's doing differently. Is there another way to solve this?
sorry, edit, that would be (deltaM/M + deltaT/T)N
Hi Bob, I have to derive the error in the wavelength. I only know how to derive error equations from multiplication or addition/subtraction. For example, if I needed to derive an arror equation for N=MT it would be deltaN=(deltaM+deltaT)N So how do I do it
I guess I gave up too soon!
okay, so I set it up as a ratio: [(1-v child)/v]*freq sound OVER [(1+v child)/v]*freq sound ALL THAT =1.05 So I have 1.05=[(1-v child)/343]/[(1+v child)/343] But I can't figure out how to manipulate this equation. I keep getting the v child as 341 m/s, and
I used the eq. f=n(v/4L). Where n=3 bc that is the second lowest frequency in a tube with one end open.
Thanks!
yes you were right, I only showed 5 and the question had six. I figured it out finally. What I didn't understand was that I had to find the resistance of the first set of parallels and then ADD that to the one beside it in series, then take the parallel of
I think the delta in front of voltage is just there because measured voltage is the potential difference, ie. delta
oh I think I have found the answer! Sorry
how did you get this?
