12/11/17

Calculate the pressure exerted by a column of water 10. m high. Water has a density of 1.00 g/cm3. Report the pressure in Pa.
I am not sure what sort of pressure law to use, if any. How do I combine this to solve the pressure in pascals?
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12/11/17

I don't understand charging by contact a neutral object and negatively charged rod.
Please explain how to do charging by contact with a neutral electroscope and a negatively charged rod 
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12/11/17

what is- a+(b+12)=(b+12+a what is the property?
 im in 7th grade and im stuck on this problem do you think you can help?  
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12/11/17

finding magnitude of the frictional force
A block of mass m is pulled by force F (originating from the top left corner of the block) in an upward direction with *angle θ above the horizontal, across a rough surface (coefficient kinetic... more
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12/11/17

When two waves interact and their amplitudes cancel out,_________ interference has occurred
Science Wave unit
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12/11/17

if the first hill of a roller coaster is 80 m tall, what is the total energy of the car if its mass is 200kg
i dont know how to do this. help me. its 9th grade physical science and i need to find total energy but i dont have the PE or KE but i know how to slove the PE but not KE because i need the velocity   more
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12/11/17

1. What is the simplified version of the expression? Assume all variables are positive.
Square root y^2/7
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12/10/17

Write as a single logarithm: log32/log2
Write log32/log2 as a single logarithm
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12/10/17

modeling using variation Hubble telescope
The Hubble Telescope can be used to see stars and galaxies whose brightness is about 1/50 of the faintest objects that now observable using ground-based telescopes. • With the fact that the... more
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12/10/17

cylinder has a radius of x+5
A cylinder has a radius of x + 5 units and a height 3 units more than the radius. Express the volume V of the cylinder as a polynomial function in terms of x. V(x) =  
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12/10/17

write a quadratic equation that has 3 as a solution and -1 as an extraneous solution
First write a quadratic equation that has 3 and -1 as solution. Then manipulate that equation so that it is a radical equation  
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12/10/17

When the elements are arranged in order of increasing numbers of protons, certain sets of priorities recur periodically
This is for a lab we are doing 
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12/10/17

A population of 410 bacteria is introduced into a culture and grows in number according to the equation ...?
A population of 410 bacteria is introduced into a culture and grows in number according to the equation below, where t is measured in hours. Find the rate at which the population is growing when t... more
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12/09/17

Find the amount of Vanadium that has decayed after 74 days as a percent.
Vanadium-48 has a half life of 16 days
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12/09/17

a number divided by -9 is -16
 it is about math, and im not sure how to answer so yeah.  
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12/09/17

Use logarithm
If x is the atmospheric pressure (measured in millimeters of mercury) then the formula for altitude h(x) (measured in meters above sea level) is h(x)=(30T+8000)log(760/x) where T is temp in... more
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12/09/17

I found a problem where I need to calculate 9! Only to 4. What would this be called? How would this be seen In a math problem apposed to (9! - 4!)
.....fjhshkgsgjfsyjkss???????
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12/09/17

alex is a sales representative and earns a base salary of 1000$ per month plus 4% commission om his sales for the month
A. Write a linear equation that expresses Alex's  monthly  salary y in terms of his sales x   
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12/09/17

friction problem
To determine the coefficient of friction between a rough surface and a block, the surface is kept inclined at 45° and the block is released from rest. The block takes a time t in moving a distance... more
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12/08/17

if I build a robot that can build another robot in 4 days, and so on, how long until I have 1,000 robots?
Pretty self explanatory. It's an exponential function but I keep getting different answers when I try to calculate it.
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12/08/17

How much a force will stretch a spring
Suppose that a spring has a natural length of 20 cm, and that 7 J of work is needed to stretch from a length of 30 cm to 50 cm. How far beyond its natural length will a force of 28 N keep the... more
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12/08/17

Who is responsible for appointments to the president’s personal staff ?
Who is responsible for appointments to the president’s personal staff (i.e., chief of staff)?
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12/08/17

If a playground swing is 8 feet long and it's rider swings through a distance of 9.5 feet, what angle does the swing travel through?
working on degrees, radians, angles, sin, cosine, tangent
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12/08/17

How far would you have to stretch....
How far would you have to stretch a 150n/m spring so that it applies a 30n force?
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12/08/17

Log a (b)=c is equivalent to a^b=c
True or false with explanation please. Logarithms are so confusing
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