01/11/22

Conservation of energy physics problem
Two boxes are connected over a pulley and held at rest as shown below. Box A has a mass of 15 kg and box B has a mass of 12 kg. If the bottom of box A is originally 85 cm above the floor, with what... more
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01/10/22

specific probability
A certain internet cafe assigns a 4 character log in (At random) These Characters are composed of all the letters of the alphabet including upper case and lower case plus 0-9. So if i am counting... more
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01/10/22

Can someone please help me with this Chemistry question
Octane, C8H18, a constituent of gasoline burns according to the equation: C8H18(l) + 12.5 O2(g) ---> 8CO2(g) + 9H2O(l)0.1111g of C8H18 was burned in the presence of excess O2 in a bomb... more
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01/09/22

Power (physics highschool)
An electric motor hoists an elevator, weighing 14.0 kN, 8.00 m in 15.0s at a constant velocity. The motor’s poweroutput is...? Answer: (7.47 x 104W) please show the process of getting to this... more
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01/09/22

Can someone please help me with this Chemistry question
To determine the heat capacity of a bomb calorimeter, a student added 150g of water at 50 degrees Celsius to the bomb. The bomb initially was at 20 degrees Celsius. The final temperature of the... more
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01/09/22

How fast is the price decreasing, in hundreds of dollars, at the beginning of year 1?
In the past two decades, the price of some hardware has decreased logarithmically. For a certain brand of hardware, the price, in hundreds of dollars, is modelled by the following function: f(x)=−2... more
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01/08/22

help! deadline tomorrow )): 2. It is desired to prepare 200 ml of a buffer solution of pH 4.5 from acetic acid, CH3COONa and its salt, sodium actetate, CHCOONa. For CH3COOH, pKa = 4.74. Calculate:
2. It is desired to prepare 200 ml of a buffer solution of pH 4.5 from acetic acid, CH3COONa and its salt, sodium actetate, CHCOONa. For CH3COOH, pKa = 4.74. Calculate:a. the volumes of 0.20M... more
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01/08/22

How do i write the equations and plot both of them on a graph.
Babysitting:Suzie and Brenan babysit for two different families to make a little extra money. Suzie's pay is $8 per hour as well as $10 extra per week as a retainer. Brenan's pay is determined by... more
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01/07/22

Physics doubt - Work
The work is 0 when force acts in the perpendicular direction, because F . S cos 90 = 0. But WHY is it so?? What is the reason? Say, for instance a ball is rolling and I put my leg on it to stop it... more
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01/07/22

The measures of two sides of a triangle and the angle opposite one of them are given. Solve all possible triangles if any. Please show your solutions.
b = 5649, a = 6382, β = 59.43°
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01/07/22

Suppose that you and a friend are playing cards and you decide to make a friendly wager.

The bet is that you will draw two cards without replacement from a standard deck. If both cards are clubs, your friend will pay you $6. Otherwise, you have to pay your friend $3. What is the... more
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01/07/22

When the angle of elevation of the sun is 61 degrees, the building casts a horizontal shadow of 50 meters. How high is the building?

When the angle of elevation of the sun is 61 degrees, the building casts a horizontal shadow of 50 meters. How high is the building?
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01/07/22

Which display gives you a better understanding of the data?

The data represents the responses in degree Fahrenheit collected to answer the question how hot is the sidewalk during the school day... more
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01/06/22

Investment problem
Joy invests a total of $10,500 in two accounts. The first account earned a rate of return of 5% (after a year). However, the second account suffered a 2% loss in the same time period. At the end of... more
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01/06/22

The question is about the radioactive decay for AP Physics 2 students.
What are alfa, beta and gamma particles. Why their penetration abilities are different?
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01/05/22

Question in Description
For the regions bounded by y = 6cosx and Part A: Find the limits of integration.Part B: Write an expression representing the total area.Part C: Solve for the total area.
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01/05/22

The density of lead is 11.34 g/cm3 and the density of aluminum is 2.69 g/cm3. Find the radius of lead and aluminum spheres each having a mass of 70 kg. (Round your answers to two decimal places.)
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01/05/22

Perform the indicated operation and give each result with the proper number of significant digits. 4.7 - 2.65 =
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01/05/22

In 1 energy level, is only 1 electron present like the planets?
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01/05/22

The function f(x)=4.2cos(π/6(x−1))+13.7 models the average monthly temperature, where x is the number of the month (e.g., January = 1, December = 12), in a particular city.
What is the average rate of change in temperature between January and March?
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01/05/22

A line passes through the points (2,a) and (4a,5) and has a slope of 1/2. Find the value of a
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01/05/22

Write a polynomial function of least degree that has rational coefficients, a leading coefficient of 1 and the given zeros: Which are √2, and 3i
How would the √2 and 3i be zeros! With steps please
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01/05/22

1. The shorter side of a rectangle is 92 cm and the angle made by the diagonal and the shorter side is 60.71 degrees. Find the length of the rectangle.

1.   The shorter side of a rectangle is 92 cm and the angle made by the diagonal and the shorter side is 60.710. Find the length of the rectangle.
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01/04/22

Acid solution problem
Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 65% hydrochloric acid solution. How many liters of each should she mix to get 735 liters of a hydrochloric acid solution with a... more
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01/04/22

20% of the population is unvaccinated, 29% of total hospitalizations are unvaccinated. how much more likely is someone unvaccinated to end up in the hospital

20% of population unvaccinated 29% of patients in hospital are unvaccinated how much more likely is someone unvaccinated to end up in the hospital
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