04/27/16

Give the structure of 4-ethyl-6-methyl-3-octanol
please help
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04/26/16

calculus question
a freight elevator is loaded with freight at ground level and weighs 2,820 pounds.The elevator is to be pulled up by a 40 foot cable that weighs 15 pounds per linear foot using a pulley... more
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04/26/16

A toy rocket is launched from the top of a building 380 feet tall at an initial velocity of 64 feet per second.
The height of the rocket t seconds after launch is given by the equation S(t)=-16t2+64t+380 when does the rocket reach its maximum height? What is the maximum height?
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04/26/16

what's the end behavior to this equation?
F(x)=3^x is the equation of the problem  as x=-infinity, f(x)= as x=positive infinity, f(x)
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04/26/16

In mL, how much of 3Cu(PO4)2 and 2Na3PO4 will I need to make 10 grams of Cu3(PO4)2?
Balanced equation: 2Na3PO4(ac) + 3Cu(NO3)2(ac) = Cu3(PO4)2(s) + 6NaNO3(ac)   Na3PO4 molarity: (1.0 M) Cu(NO3)2: (5.0 M)   I don't know how to calculate how much of 2Na3PO4(ac) and... more
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04/25/16

What kinda of system of linear equations would be hard to solve by graphing?
I'm currently working on Linear equations and I got this question on a tale home quiz but tje teacher never went over this is class...pls help! Thanks
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04/25/16

A ball has a diameter of 3.79 cm and average density of 0.0844 g/cm^3. What force is required to hold it completely submerged under water?
I need help solving this problem please.
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04/24/16

Speed word problem
The speed of a stream is 3mph. A boat travels 10 miles upstream in the same time it takes to travel 16 miles downstream. What is the speed of the boat in still water?
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04/24/16

problem solving
I don't know how to set up this problem.      A family goes on vacation to a water park. During the drive to the water park the weather caused the family to average 44 miles per hours. After... more
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04/24/16

a 7.5kg block is placed on a table.if its bottom surface area is 0.6m2 how much pressure does the block exert on the tabletop?
if you can please show me how you got your answer . Thanks!
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04/23/16

Find its displacement?
Assume that there's no damping, an object stretches a spring 4 inches in equilibrium. Find its displacement for t>0 if it's initially displaced 36 inches above equilibrium and given a downward... more
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04/23/16

physical chemistry assignment question plz help
you prepare a buffer solution by  dissolving 2.00g each of benzoic acid C6H5COOH and sodium benzoate NaC6H5COO in 750.0 ml of water .What is the pH of this buffer ? Lets assume that the solutions... more
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04/22/16

Is vector necessarily changed if it is rotated to angle
This question is from physics book HC Verma
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04/21/16

How to find using snell's law
Need to know how to solve and how you got an answer. A beam of light moves from air to an optical fiber (n=1.44). If the beam of light entered at a 23 degree angle, what is the angle of refraction... more
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04/19/16

How far above the Earth’s surface must we be before “g” has...
How far above the Earth’s surface must we be before “g” has decreased significantly by dropping 10%? Answer: 345 km
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04/17/16

What distance do you need to travel to stop compared to the distance that your friend needs to travel to stop? If it were on a slippery road would I slide more?
You are traveling in your car with the speed of 50 km/hr, your friend is traveling in a different car with the speed of 25 km/hr (both cars have the same mass)
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04/14/16

Physics question
Science question: If the car is started on a zero friction surface and zero air resistance but force of gravity acting upon it, Will it continue to travel at a constant speed even when engine is... more
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04/13/16

2. 500ml of a 20% potassium chloride solution is ordered by the physician. The stock solutions available are 40% and 10%. How much of each is needed to make thi
pharmacy math - alligations
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04/13/16

A 70% solution and 20% solution are combined to make a 30% solution. What is the ratio
pharmacy math
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04/13/16

physics numercial question form SOUND
a toy car blowing its horn is moving with a steady speed of 5 m/s away from a wall.an oberver towards whom the toy car is moving is able to hear 5 beatsper second.if the velocity of sound in air is... more
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04/11/16

problem about interference - waves
You have two vibrating objects in an infinitely large pool. The distance between them is 6.0 m. Their frequency of vibration is 2.0 Hz and the wave speed is 4.0 m/s. The vibrations are sinusoidal.... more
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03/31/16

A 3.0kg cart travels along a level surface at 8.0 m/s and collides with an identical stationary cart. If a...
A 3.0 kg cart travels along a level surface at 8.0 m/s and collides with an identical stationary cart. If a negligible amount of kinetic energy is lost in the collision. What is the speed of the... more
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03/30/16

need help really tired
.A lens forms an image 15 away. The object us located 10 cm from the lend. What is the focal length of lens? What type of lens is it?
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03/30/16

I 'm really stress of trying
A student finds an image during their lens lab. They notice that the image is larger and inverted compare to the original.Is the image real or virtual? How do you know? Where is the object located... more
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03/30/16

What is the maximum torque on the motor?
A motor run by a 9.5-V battery has a 20-turn square coil with sides of length 4.8 cm and total resistance 21 Ω . When spinning, the magnetic field felt by the wire in the coil is 0.021 T .
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