1. Homework Statement
A new drug is in trial, and it is found that the drug will cause adverse effects on some patient.
5% will have diarrhoea and 3% develop a rash after taking the drug. Also, 7% of patient have either diarrhoea, rash or both after taking the drug. Need to find the...
the following data apply to the speaker system:
coil diameter = 5.8cm
coil turns = 86
coil and cone mass = 30g
magnetic flux density = 0.12T
Current in the coil = 1.8A
Using the above data, the acceleration of the cone will be?
A) 12.6 b) 79.3 c) 113 d) 247
This comes from my revision sheet i...
So i did an experiment and pu tiron nail into water and serveral days later it starts to rust.
and i looked at the book and the chemical process is
1)Fe loses electron
2) that electron + oxygen + water produces hydroxide
3) hydroxide and Fe ion reacts and form Fe(OH)2, green rust
4)...
hello, I am not too sure of how charged particle got to do with magnetism.
"Magnetism is a force of attraction or replusion that acts at a distance. It is due to a magnetic field, which is caused by moving electrically charged particles or is inherent in magnetic objects such as a magnet."...
1. Homework Statement
Find the first, second, third, fourth, fifth derivatives of the function y = sin 3x.
Find a rule that can help to find the 50th derivative of the function.
It's urgent!
2. Homework Equations
y= sin x y= cos x
y' = cos x...
1. Homework Statement
solve below using de Moivre's theorem, in polar form
z^3 = i
2. Homework Equations
r CIS theta
Answer:CIS pi/6, CIS 5pi/6, CIS (-pi/6)
3. The Attempt at a Solution
r^3 = sqrt(0^2+1^2)
r^3 = sqrt (1)
r = sqrt (1)
no idea how to get the angle
why does the increase of sound frequency will decrease the penetration depth?
how can this related to diffraction of sound?? Is it because they can be easily reflected??
need answer desperately, thx
how does ultrasound machine detects the reflected wave?
i have read a bit of information and unfortunately Im still unsure how they detect the wave.
"The rapid shape changes, or vibrations, of the crystals produce sound waves that travel outward. Conversely, when sound or pressure waves...
1. Homework Statement
f(x) = ((x^2+2)^2)/(x+2)^1/2
Use the chain rule to find the derivative
2. Homework Equations
None
3. The Attempt at a Solution
((x^2+2)^2)(x+2)^-1/2
PS: Answer in the book is 3x((x^2+2)^1/2)
I have no idea how they get it there, would like some help, thx!
1. Homework Statement
this is not a homework question... i want to know density vs resistance
2. Homework Equations
R = ρl/a
3. The Attempt at a Solution
none so far
how do i find the independent of x in (6x^(2)-3/x)^6
I know that the formula nCr a^(n-r) b^r
i have got an answer of n = 6 and r = 4 i just wanna make sure that im correct and i would like someone to give me a hand~ :)
I do not understand Spherical coordinate system.
I'm asked to compare the differences with Cartesian coordinate but I have no idea how to start.
So I would like some help that will at least give me a understanding of the spherical coordinate system, thx
just wondering if i put oil in a microwave oven will the oil get heated and why?
i know polar substances will be heated but im not sure if the same thing will happen to non-polar substance like oil