03/20/17

Grandparents of a new-born child want to invest money in a college fund so that their grandchild will have $50,000 at the age 18. The interest rate at the bank
Grandparents of a new-born child want to invest money in a college fund so that their grandchild will have $50,000 at the age 18. The interest rate at the bank is 4.25%. If the interest was... more
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03/20/17

magnitude of magnetic field
A circular region of r=0.003 m has a uniform displacement current that flow perpendicular to the plane with Ip = 0.500 A.  What is the magnitude of the magnetic field due to the displacement... more
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03/18/17

The energy difference between the two laser levels is 0.275 eV. What is the frequency of the radiation emitted by this laser?
No other details, this is all that is provided in the question.
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03/17/17

Quadratic Equation Question. Please solve with all the steps. Thanks a lot in advance.
A goods train leaves New Delhi at 5 p.m., followed by a passenger train, which leaves the station at 7 p.m. The passenger train travels 20km/hour faster than the goods train. The passenger train... more
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03/17/17

Can you check my physics work?
I cant get the math right can you give me thees calculations its form my science project and i just don't know enough physics to answer them. Im trying to convert the impact and pressure of giraffe... more
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03/16/17

Marcos had 15 coins in nickels and quarters. He had 3 more quarters that nickels. Write a system of equations to represent this situation.
Let x represent the number of nickels and y represent the number of quarters 
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03/15/17

Assuming the base of the ladder does not move, about how much higher will the top of the ladder be above the ground when the ladder extended to twice its...
An extendable ladder 9.8 feet long leans against a wall with the base 3 feet from the wall. Assuming the base of the ladder does not move, about how much higher will the top of the ladder be above... more
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03/14/17

A $600 bond earns 4.5% simple annual interest. Describe and correct the error finding the total interest earned after 18 months.
i=PRT =(600)(0.045)(18) =486
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03/14/17

The 440Hz tuning fork is used with a resonating column to determine the velocity of sound in helium gas.
If the spacing between resonance are 110 cm, what is the velocity of sound in He?   ans. 970m/s   ps. How can I get the answer? Thx! 
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03/14/17

thermodynamics
An insulated beaker with negligible mass contains 0.310 kg of water at a temperature of 70.5°C. How many kilograms of ice at a temperature of −20.0°C must be dropped into the water to make the... more
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03/13/17

Help please
Two missile silos are taking aim at a stationary target in the sky with powerful rockets that shoot in a straight line. The missile silos are shooting from the left and the right of the stationary... more
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03/13/17

What is gauss
x+y+z=2 2x+y-z=5 x-y+z=-2  
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03/13/17

calculate the missing term
3:12 = 6:x   x:1.6 =3.2:6.4   1: 5 1/5 = x: 3 3/4
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03/13/17

What is the base price for the ballroom rental?
Tabitha is renting a ballroom for an upcoming dinner reception. The rental fee for the ballroom includes a base price plus the cost of dinner per person. The table below shows the cost of the... more
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03/13/17

HELP ASAP I NEED YOU TO ANSWER THIS MATH GRADE 8 QUESTION
Nicole is a wedding planner. The guests are to sit at a circular table with a diameter of 180cm. Each guest needs 70cm around the circumference of the table. There are 18 tables at the venue. A... more
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03/12/17

Finance question
If some spends 2,852 on metal roofing and 1,800 on labor and took out a loan to cover the cost at 8.75 percent for 6 months how much was the loan
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03/12/17

trigonometric identities
from the top of a hill the angle of depression of two consecutive 1 km stones due west are found to be 30 and 45 degrees . find the height of the hill  
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03/11/17

Calculate the volume of 42 kg of helium gas.
Answer is 235,200L.   ps. How do I get to the answer by using mole highway? Thx!
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03/11/17

Distance Rate Time
Two automobiles each travel 60 km at steady rates. One car goes 6 km/h than the other, thereby taking 20 minutes less time for the trip. Find the rate of the slower car.    I'm having... more
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03/11/17

we shine light of wavelength 1nm an electron -proton plasma so what are the two wavelentghts of light we would observe at a scattering angle of 90? h
modern physıcs question
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03/10/17

Estimate the temperature of a 78 degree room after the air conditioner has been on for 4 minutes and 12 minutes.
When an air conditioner is turned on maximum in a bedroom at 78°, the temperature, T, in the room after A minutes can be approximated by the function T(A)=−0.02A2−0.32A+78, 150≤A≤15. Estimate the... more
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03/09/17

2x+15 and 3x + 15
the measure of two supplementary angles are 2x+15 and 3x+15 what is the value of x
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03/09/17

Algebra 2 HN
If 2 people can stack 60 boxes in 10 minutes, how many minutes will be required for 6 people to stack 120 boxes. Make an equation with the given information.
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03/09/17

What is the sum of the measures of the interior angles of a regular drcogin (10 sided shape)?
Just some geometry. 10th grade work  
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03/09/17

A 40 kg child sits in a 10 kg wagon at rest with five 1.0 kg blocks. The child has...
A 40 kg child sits in a 10 kg wagon at rest with five 1.0 kg blocks. The child has a temper tantrum and begins to throw the blocks out of the wagon with a speed of 2.0 m/s. What is the change in... more
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