09/06/17
Describe two situations in which opposite quantities combine to make zero
I got this for math homework but I don't get it
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09/06/17
A car is moving with 100 km/h during the first leg (0-120 km) of a 200 km trip, and with 75 km/h during the second half:
A.) compute the total time travel (for the 200 km)
B.) the average velocity of the car during the entire trip
C.) which leg of the trip (one or two) took more time to complete?
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09/05/17
A balloonist at an altitude of 800m drops a package. One second later, the balloonist drops a second package. How far apart are the packages the instant that
A balloonist at an altitude of 800m drops a package. One second later, the balloonist drops a second package. How far apart are the packages the instant that the first one hits the ground ?
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Wavelength physics question
Imagine the hydrogen atoms in one of Hubble's distant stars emitting a photon of light at a wavelength of 410.17 nm. If that particular proton were headed directly toward Earth, how much closer to...
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08/29/17
David had $80. He spent 4/5 of his money on books. How much did he have left?
Tape diagram to solve answer
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08/29/17
A factory using 4 million BTUs of energy each month is using how many kilowatt-hours of energy
Please with work
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08/29/17
Cherries make up 20% of all trees. What part of the number of cherry trees does the number of apple trees make up.
A garden has cherry trees and apple trees
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08/29/17
A drum Radius 0.65m ,1.2m high . How many liters of fuel can the drum hold
If 1 m3 = 1000000 cm3 , 1 cm3 = 1ml
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08/28/17
can you give me an algebreic expression for this problem?
A store has some shirts on a rack. By 12:00, half of them were gone. Then another forth of that was gone by 3:00. Now there are 12 shirts left. How many shirts were there at first?
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08/28/17
Find Electric Field along z-axis
An infinite number of identical charged rings of radius w and charge Q are arranged coaxially along the z- axis such that each adjacent pair is a distance w apart and one lies with the origin in...
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08/28/17
Einstein's Theory of Relativity
Einstein's Theory of Relativity, When objects travel faster time slows down for them relative to other people. People say "Astronauts age slower because they travel faster in space, obviously by...
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08/28/17
The sum of a number and 9 is multiplied by -2 and the answer is -8. Find the number.
The sum of a number and 9 is multiplied by -2 and the answer is -8. Find the number.
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08/16/17
Give the order of increasing certainty for the inverse of each of the following values 0.0052, 5.501, 6.45X10^6
Give the order of increasing certainty for the inverse of each of the following values, none of which is exact (the inverse of x is 1/x). 0.0052, 5.501, 6.45X10^6
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07/26/17
an object B acted upon by a 10 pound force at 90 degrees and a 20 pound force at 30 degrees. Find the magnitude and direction of the resultant force
can someone answer this please?
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07/26/17
Question in description (please answer)
A car of mass 1.5 tonnes is driving up a hill, the hill makes an angle of 10 degrees to the horizontal, at a constant 30km/h. Neglecting any friction, what is the power required from the engine to...
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07/01/17
Yoko's Coffee Shop makes a blend that is a mixture of two types of coffee.
Yoko's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Yoko
$5.85
per pound, and type B coffee costs
$4.80
per pound. This month's...
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05/25/17
differentiate with respect to x ax^2+2hyx+by^2
differentiate with respect to x
ax^2+2hyx+by^2
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05/15/17
Inverse Square Law questions, urgent help! Please, answer all!
1. You are standing 10 meters from a light source. Then, you back away from the light source until you are 20 meters away from it. From your perspective, what has happened to the intensity of the...
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05/15/17
Kim worked for 7 3/4 hours on Wednesday. If he spent 1/2 of that time cleaning his office, how many hours did he spend cleaning?
This is 5th grade homework
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05/11/17
if the radius of curvature for a concave mirror is 50 cm, at what distance will there be no image formed?
a. 23 cm
b. 50 cm
c. 100cm
d. there will always be a clear image
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05/10/17
By the Archimedes' Principle, what about when the block has sunk to the bottom is true?
1. The weight of the liquid displaced is less than the weight of the block.2. The weight of the liquid displaced is greater than the weight of the block.3. The weight of the liquid displaced is...
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05/07/17
A bus is $720. Each member pays an equal amount of the expense. When eight members back out, the expenses of the other members go up by $3 each.
A bus is $720. Each member pays an equal amount of the expense. When eight members back out, the expenses of the other members go up by $3 each. How many members went on the trip?
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