A projectile is fired vertically from Earth's surface with an initial speed of 8.2 km/s. Neglecting air drag, how far above the surface of Earth will it go?
I am completely stuck. What formula should i use, this was in the Gravitational Potential Energy /escape speed section
Can someone help me calculate the following problem:
I want to find out how many times more intense is 44 decibels compared to 32 db.
Example: If in a house the maximal level of sound disturbance allowed is 32db, and the actuall measured sound level is 44db, then how much more intense is...
Hey all, I am stuck on this problem.
A spaceship is ona straight line path between Earth and its mon. At what distance from Earth is the net gravitational force on the spaceship zero?
Well, when I try to use the Universal law of gravitation. F=G(m1)(m2)/r^2, I could find the...
Dear Sirs,
i would like to now exactly the role of these two substances in the process of fat digestion.
1. bile
2.lipase
thank you for this lovely site, and i appreciate your kindness and generous to answer me this simple question which confused me a lot.
with my regards
A pair of dice is being rolled. The probability for rolling a sum greater than 8 is 10/36.
Is the probability for it taking two rolls to attain a sum greater than 8 just 26/36 times 26/36?
I need to make a table of the number of rolls it takes to obtain a sum greater than 8, and the...
hi,
This has probably been asked and answered a million times before so sorry but here goes. I urgently need help with a Maths University project about the A-Bomb which will include a chapter on Special Relativity and e=mc^2. I have read loads of books but they treat special relativity from a...
Please help with the following problem:
Do not know where to start!
Give an example of two sequences Xn(sum from 1 to infinity) and Yn(sum from 1 to infinity) where lim (as n tends to infinity) of (Xn + Yn ) exists but lim (as n goes to infinity) of(Xn +Yn) does not equal lim (as n goes to...
i need urgent help
can anyone suggest some link that clearly states the physical property needed for a stainless steel knife?
i desperately need it today.
thz
any help will be GREATLY appreciated
Imagine there is an object on the surface.
The surface is uniform smooth(with same friction over the all surface and friction is greater than 0).
Let's define the friction be f.
Act a f force to horizontally to the object continuously, it is continuous added.
It is obviously stationary...
two astronauts initially at rest in free space, pull on either end of a rope. Astronaut Alex played football in high school and is stronger than astronaut Bob, whose hobby was chess. The maximum force with which Alex can pull, Fa, is larger than the maximum force with which Bob can pull, Fb...
Alright, here's my Q and A. Please verify :smile:
By means of a rope whoe mass is negligible, two blocks are suspended over a pulley, as the drawing shows (attachment). The pulley can be treated as a uniform solid cylindrical disk (I=1/2MR^2) The downard acceleration of the 44.0 kg block is...
URGENT what's RCS
what is RCS supposed to mean in physics, i have a quiz tommorow with that as a bonus question, i know it has something to do with angles...
This might be an easy problem, but I am missing something and am not sure where to start so here is the problem:
A student ties a 500g rock to a 1.0-m-long string and swings it around her head in a horizontal circle. At what angular velocity, does the string tilt down at a 10 degree angle...
Just a question to clear things up regarding to the integrating factors for my exams tomorrow:
The standard first order differential equation has the form:
dy/dx + p(x)*y = q(x).
where the integrating factor is e^(integral of p(x) dx).
But in one of the previous year paper, it has...
Suppose that X and Y are independent random variables, where X is normally distributed with mean 45 and standard deviation 0.5 and Y is normally distributed with mean 20 and standard deviation 0.1.
(a) Find \ P(40 \leq X \leq 50, \ 20 \leq Y \leq 25). Ans. ~0.5
(b) Find \...
Help Needed! Waves, Urgent!
******Mathematical description of a wave:******
A transverse wave on a string can be described by:
Y(x,t)= A cos [k(x-vt)]
a) Find the maximum transverse speed vy of a particle of the string. Under that circumstances is it equal to the propagation speed of the...
Does someone by chance have James Rachels' "Divine Command Theory", and wouldn't mind scanning it, or know of where the file exists?
Need it by the 25th, please...
Merci
Hello guys. I have a little problem here.. we are doing a colorimeter (sorry in advance for the english errors. I don't know if it is called like that in english I am translating from french.) experience and I have to use this formula
D = e* L * C
e= D/ LC
where L is a constant 1cm.
L=...
Urgent! I really need help please!
Sorry for posting this question again. Lemme try to rephrase my question if it helps :frown: . Please help me get started on this question. I am really stuck and time is running out! :cry: I don't want the answer, I just need some pointers to get me...
If you jump from a desk and land stiff-legged on a concrete floor,
the chance is good that you will break a leg. To see how this
happens, consider the average force stopping your body when you
drop from rest from a height of 1.00 m and stop in a much shorter...
Urgent help needed on physics problem!
A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 6.40 s later.
What is the rocket's acceleration?
I have less than an hour to answer this...
Vector Problem URGENT
Two vectors A and B have precisly equal magnitudes. In order for the magnitude of A +B to be larger then the magnitude of A - B by the factor n, what must be the anle between them?
There is the question i need help on this quickly thank you for nehelp i know u have to...
Please help me with this question! I understand the concepts of potential difference and charge etc but i don't understand what to do with the velocity.
1) In a lightning flash, the potential difference between the cloud and the ground is 1.0 x 10exp9 V and the quantity of charge transferred is...
Hi there!
My name is Lisa, and I live in the Netherlands (where school has already begun 2 weeks ago ). I have a pretty urgent question concerning a physics project. I need to think of a certain construction which launches an arrow/ dart arrow / marble from a variable angle.
It's very...
Hi! I have a physics problem that I just don't understand. It is as follows:
Imagine that you are in an elevator with a tank of water and three goldfish. A device in the gravel (of the fish tank) measures gauge pressure at the bottom at the tank.
(a) Suppose it reads 4000 N / m² with the...
Two rods, one of aluminum and the other of copper, are joined end to end. The cross-sectional area of each is 4.0 x 10^-4 m^2, and the length of each is 0.040m. The free end of the aluminum rod is kept at 302 degrees Celsius, while the free end of the copper rod is kept at 25 degrees Celsius...
Our problem is that we measured the rate of change of pressure of a liquid at different length of a pipe, for example, x=0, x=5cm, ... etc, caused by a pump at x=0-15cm=-15cm and got a result that at x=0, dP1/dt1 = -dP2/dt2, where dP1 is the pressure difference over a fixed interval, del t1, and...
Hopefully someone here knows what I'm talking about, but here it goes.
I'm doing my leaving cert applied maths paper in 2 days time, and I'm stuck on this question. I can't follow the solution available on the internet, so i need someone to go through it step by step. Its Q7 in the paper...
Yes, i am looking for a job, to be more precise, for something to do and get paid via the net. Computer related jobs!
I am not in the US right now.
So , can you introduce me some places where I can find one?
Please help...
Thank you inadvance
Please I know that this question has ben asked many times, but I really need to get an answer on it. It's urgent.
Is the universe finite or infinite ?
If there is another thread discussing the question, please post the link.
Also any other link poiting to a relevant website is...
Question : A wall is placed in the middle of the room (not those thick walls but regular thin walls). And an object is continuously hitting it with a constant force. Physicists believe that if it keeps hitting the wall with a constant force, the atoms at that particular place on the wall will...
Urgent- Physics coursework on sensing (OCR B)
The coursework is on using sound waves to measure the depth of water in a tank. I emit soundwaves using a sound generator and pick of the reflected wave with a mic. The original wave and the reflected wave are then shown on a osiliscope. I then need...
An infinitely long thin wire carrying a constant I is located along 0z-axis while a rectangular loop of dimensions axb located in the plane 0yz moves parallel to the 0y-axis with a constant velocity v. Assuming the two of the edges of the loop are parallel to 0z, compute the emf's induced on...
Greetings physics wizzes!
I am trying to find out what time the new moon reaches it's apex tonight. This is probably the most elementary task but I'm fairly clueless when it comes to this stuff.
Any help would be greatly appreciated, Thanks.
http://www.myimgs.com/data/Cyto/Physics.jpg
The ramp and the ledge which the box sits on is has a Mu(k) of 0... the spring compression of the block when released from rest is 98cm... i found the height of the ramp being 29m, and the speed at the top of the ramp being 11.8.. i just need help...
1. Does a graph of force of friction vs force normal pass through the origin? Explain.
2. Does the force of kinetic friction depend on the weight of the object? Explain.
3. Does the coefficient of kinetic friction depend on the weight of the object? explain
This is not on an icline plane.
My good friend's wife is dying of cancer. She has "final stage, inflammatory, breast cancer", or something like that. I need whatever information (perhaps some links or references) anyone has on the possible cures (particularly something "natural").
Also, does anyone have information on...
Here is a question that is giving me fits.
An electron is trapped in an infinite quantum well. If the lowest energy transition is to produce a photon of 450nm-wavelength, what should be the well's width?
Any help is appreciated. :)