11/18/21

Could someone help me with this,please?
A child of mass (m = 47.4 kg) is released from rest at the top of a water slide at a height 6.3 m above the bottom of the slide. If she reached the bottom with a speed of 19.7 m/s. The work done... more
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11/18/21

When inverting a graduated cylinder, why do we have to correct the volume by subtracting 0.2 mL?
enthalpy of vaporization and clausius-clapeyron equation
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11/17/21

Please help... Thank you
The projectile, of mass m0, is fired into a large block (of wood or other material) of mass M, which is suspended like a pendulum. (Usually, M is somewhat greater than m0.) As a result of the... more
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11/17/21

An angry rhino with a mass of 2700 kg charges directly toward you with a speed of 4.70 m/s. Before the events, you throw a 0.180-kg rubber ball directly at the rhino with a speed of 6.56 m/s.
Determine the speed of the ball after it bounces back elastically toward you.=?
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11/16/21

Find all angles, 0 ∘ ≤ θ < 360 ∘ , that satisfy the equation below, to the nearest 10th of a degree. 5 cos ⁡x sin ⁡ x + 4 sin ⁡ x = 0
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11/16/21

Optimization Application
A rectangular beam is cut from a cylindrical log of radius r = 48 cm. The strength of a beam of width w and height h is proportional to wh2
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11/15/21

Estimate the area under the graph of f ( x ) = 1 /(x + 3) over the interval [ 1 , 4 ] using five approximating rectangles and right endpoints. Do the same for the left end points .
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11/15/21

In any normal distribution, the probability of randomly selecting an observation that is less than the population mean is 68%. True or False?

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11/14/21

Whats the solution set for 2x+y=6, y=2x-4
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11/14/21

The future value that accrues when $900 is invested at 7%, compounded continuously, is S(t) = 900e0.07t where t is the number of years. (Round your answers to the nearest cent.)
(a) At what rate is the money in this account growing when t = 6?(b) At what rate is it growing when t = 12?
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11/14/21

If the total revenue function for a computer is R(x) = 1600x − 26x2 − x3, find the level of sales, x, that maximizes revenue and find the maximum revenue in dollars.
x= ________ computersR(x) = $ ______ ?
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11/14/21

Calculate the percentage by volume of a solution of 200 cm3 of sulfuric acid (H2SO4) in a solution with 2 kg of water.
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11/13/21

Which rule concerning oxidation numbers is NOT true?

A. The product of all oxidation numbers in a molecule must equal the charge of that molecule. B. A substance with only one type of atom in it has an oxidation number equal to the charge of the... more
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11/13/21

Calculus Rates of Change
Nemo is standing at point A which is 20 feet away from a balloon when the balloon starts to rise at 5 ft/sec. At the instant the balloon is 21 feet high, how fast is the straight-line distance... more
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11/12/21

A rancher has 640 feet of fencing with which to enclose two adjacent rectangular corrals . What dimensions should be used so that the enclosed area will be a maximum?
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11/12/21

Can someone please help me and check-over my answers to these two Chemistry problems?
Group 1A metals always have an oxidation number of _______ in molecules that contain more than one type of atom.A. –2B. –1C. 0D. +1E. +2 Group 2A metals always have an oxidation number of _______... more
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11/12/21

math exam final

∠ and ∠B are vertical angles. If m∠A=(5x+6)∘ and m∠B=(6x−25)∘, then find the value of x.
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11/12/21

Find the value:
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11/12/21

Write the balanced NET ionic equation for the reaction when magnesium iodide and sodium carbonate are mixed in aqueous solution. If no reaction occurs, simply write only NR.
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11/10/21

What current (in A) is required to plate out 5.21 g of nickel from a solution of Ni2+ in 26.13 minutes?
Please show steps it took to get answer. Thank you so much!
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11/10/21

Can you show me how to find (1.016)^3 without calculator?
Anyone can do 1.0163 with a calculator but I am weak in decimal-related calculations and have to sit for exams that do not allow calculators. So can anyone show how to do this step by step without... more
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11/10/21

If they worked alone, how long would each of the workers take to finish the work?
Two workers were given some work. When the first one had worked for 7 hours and the other worker for 4 hours, It turned out, that in total they had done 5/9 of total work. Nowthey worked together... more
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11/09/21

What is the pH of a bleach solution that has a [OH−]=3.2×10−3 M? pH=
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11/09/21

What is an equation of the line that passes through the point (5,1) and is parallel to the line x+y=9
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11/09/21

Compute the total enthalpy change by using the Hess Law
Use the Hess law to calculate the total enthalpy2H2O ------> 2H2 + O2 +572 KJ/mol2HF  ------> H2 + F2 + 542 KJ/mol
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