03/13/17

Differential Equations
3. Solve the following differential equation:y″+9y=0; y=3, y′=3 at x=Π/3   I've never seen a situation with, "y′=3 at x=Π/3"
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03/13/17

The half-life of a radioactive kind of neptunium is 7 minutes. How much will be left after 14 minutes, if you start with 9,808 grams of it?
exponential growth and decay
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03/13/17

Differential Equations
Find the general solution of the differential equationy″(t)+36y(t)=0   I found the general solution to be: Asin(6t)+Bcos(6t)   For each of the following initial conditions, find a particular... more
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03/13/17

Simple Harmonic Motion
What is the differential equation that defines simple harmonic oscillation, and its general solution. State two physical conditions that must be satisfied for simple harmonic motion to occur in a... more
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03/12/17

A 169ml flask has a mass of 27.5g when empty. When the flask is completely filled with a certain liquid it weighs 187g. What is the density of the liquid?
This is for my chemistry 1 class.
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03/11/17

1-1/cos^2beta
Simplify the following expression using the fundamental identities. Enter the fully simplified answer.
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03/11/17

Use an associative property to complete the following statement. Do no simplfy.
(4+8) + 26=
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03/11/17

An element crystallizes in a structure having fcc unit cell of an edge 200pm.calculate its density,if 200g of this element contains 24*10to the ratio23 atoms.?
Complete hints provide
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03/11/17

Always store heavier items in lower shelves
When lifting any items from floor, always bend your back and don’t bend your knees?
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03/10/17

a procedure done under controlled conditions to test a hypothesis is an inquiry
a procedure done under controlled conditions to test a hypothesis is an inquiry
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03/09/17

how to find the slope of a tangent when the derivative involves x and y on both sides.
I was given the function x2+y2=25  at (4,-3) I took dy/dx of all the terms and got -x/y for the derivative. Using that i assumed the line would be y(x)= -(x2/y) -(4x/y) -3 but I got that wrong.... more
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03/09/17

The diameter of mars is approximately 6,794 kilometers.what is the volume of mars to the nearest cubic kilometer
please need help some help me do the whole problem 
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03/09/17

The diameter of mars is approximately 6,794 kilometers.what is the volume of mars to the nearest cubic kilometer
please help me I dont understand where to start 
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03/09/17

HARD PROBLEM
You have 3.20 moles of nitrogen gas (N2) in a 15.0 liter container at 100oC. What is the pressure of this gas?
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03/09/17

solve by using a matrix
5x-6y=-8    3x-y=3
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03/08/17

Three fourths of the students in the class did their homework last night. If 18 students in the class did their homework, how many students are there in class?
Solve your equation algebraically two different ways.
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03/08/17

60 miles away travelling 40mph how long will it take to get to destination?
60 miles away travelling 40mph how long will it take to get to destination?
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03/08/17

How can I rewrite 1/a^-n as a power of a?
I need to rewrite this: 1/a^-n, as a power of a.
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03/08/17

Can u plz help
carol has $30 to spend on gasoline after buying gasoline she has $4 how much did each gallon cost
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03/07/17

A 1.5 *10^14 kg asteroid hurtling through space at 1.5 * 10^5 m/s explodes...
A 1.5 *10^14 kg asteroid hurtling through space at 1.5 * 10^5 m/s explodes into a million pieces of different sizes and shapes. What is the total momentum of all the pieces? Answer: 2.3 * 10^19 kg m/s more
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03/07/17

A fire hose directs a stream of water against the north wall of a house. The stream
A fire hose directs a stream of water against the north wall of a house. The stream is directed southwards and the stream has a speed of 16 m/s. If the water comes out of the hose at rate of 27... more
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03/07/17

If 7 quilts = 21 yards, how many yards is 12 quilts
Show math
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03/07/17

Can you guys give me suggestions of jobs that have to do with sky? (not just astronomy and whatnot). Thanks!
I've always wondered if there were jobs where people could study the sky and not just at night with the stars. I know it sounds weird and probably stupid, but if you can help, please do. 
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03/07/17

solve the equation using quadratic formula 2x2-4x-16
this is maths question giving so i need help concerning the question please
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03/07/17

If the distance between point (1,1) and point (a,-3) is 5, what is the value of a?
If the distance between point (1,1) and point (a,-3) is 5, what is the value of a?
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