04/20/22

Calculate the magnitude and direction of the resultant electric field at the origin due to these charges
A point charge 𝑞1 = +6.00 𝑥 10−9𝐶 is at the point 𝑥 = 0.800 𝑚, 𝑦 = 0.600 𝑚 and a second point charge 𝑞2 = −2.00 𝑥 10−9𝐶 is at the point 𝑥 = 0.800 𝑚, 𝑦 = 0 𝑚. Calculate the magnitude and direction... more
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04/19/22

For a random person from the population, what is the probability of being infected given that test result is negative?
In a certain pandemic, 80% of the people are not infected and only 3% of them test positive. 95% of the infected people test positive. For a random person from the population, what is the... more
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04/19/22

A skateboarder is rolling back and forth inside a “frictionless half pipe” that is part of a circle of radius 10m. His motion is driven by gravity. If he starts at 2 m away from the bottom of the…
A skateboarder is rolling back and forth inside a “frictionless half pipe” that is part of a circle of radius 10 m. His motion is driven by gravity. If he starts at 2 m away from the bottom of the... more
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04/19/22

Probability and Stats

The proportion of voters who prefer Candidate A is p=0.407. An organization conducts a poll of n=5 voters.Let X represent the number of voters polled who prefer Candidate A. Complete the table... more
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04/19/22

Ratio of pH buffer
What ratio of CH₃NH₂ to CH₃NH₃⁺ is needed to prepare a pH 10.10 buffer? (Kb for CH₃NH₂ is 4.4 × 10⁻⁴)
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04/19/22

[Calculus] Find The Sum of the Series ∞∑n = 0 (-1)^n (1/16)^n-1 / 2n+1
Find the sum of the series: ∑∞n=0 (-1)n (1/16)n-1 / 2n+1
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04/18/22

Please help me with this problem

4. Calculate the pH of 0.90M HPO4 2- ​Ka HPO4 2-  = 4.5 x 10-13  (a) 7 (b) 14 (c) 12.3 (d) 8.20 (e) 6.20 
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04/18/22

Ratio Test, Conditional Convergence, divergence, and interval of convergence
How do I find the values that x conditionally converges, diverges, and the interval of convergence? the power series is the sum from n=1 to infinity of (-1)^(n+1)((x^n)/n)Part a: i did the ratio... more
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04/18/22

How many grams of Pb(SO4)2 would need to react with 0.54 moles Li2SO4?
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04/18/22

How many individual oxygen atoms are contained in a sample of P2O5 that also contains 0.620 moles of P?
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04/17/22

What is the area of the region in the first quadrant bounded from above by the graph of the line y=1/2 and from below by y=sinx on the interval x=0 to x=pi/6
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04/17/22

An airplane lands and begins to slow down as it moves along the runway. If its mass is 3×106 kg and the net braking force is 6.8×105 N, what is the magnitude of the airplane's acceleration?
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04/16/22

A tank is filled with a gas to a pressure of 44.1 mm Hg at 40degrees Celcius. When the the tank is heated, the pressure increases to 1.7 atm, To what temprature was the gas heated
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04/16/22

please help! got tunnel vision on this one
The amount of horsepower needed to overcome a wind drag on a certain automobile is given by: h(s) = 0.005s2 +.007s - 0.031, where S is the speed of the car in miles per hour.How much horsepower is... more
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04/16/22

here is a question about measurements.

Jarom is working for a landscaping company and is responsible for building the stone border around a rectangular pond. The pond measures 6 meters by 15 meters. The manager told Jarom that the... more
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04/16/22

Parametric Equations--Area
Find the area bounded by the curve and the line y=65/8:x = t- 1/ty= t+ 1/tI got the area to be 4095/32, but it's wrong. I would appreciate if you could solve it step-by-step, so that I can see... more
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04/15/22

An object is projected upwards along a slope inclined at 45 degrees from the horizontal. The Initial speed is 8m/s and coefficient of friction is 0.3.

The object comes to instantaneous rest before reaching the top of the inclined surface. Calculatea) the distance the object moves before it comes to rest.b) the time the object takes to come to... more
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04/15/22

Maclaurin Series
How do you derive the Maclaurin series for f(x) = integral (sinx / x) dx? And what are the first 4 nonzero terms?
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04/14/22

redox reaction, chemistry (10.8)
The amount of alcohol (CH3CH2OH) in the blood can be estimated using a blower, where the exhaled ethanol is converted into acetic acid (CH3COOH) and water in the presence of oxygen gas. The... more
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04/14/22

Shell Method to compute
Use the Shell Method to compute the volume of the solid obtained by rotating the region underneath the graph of  1/(square-root(x^2+5)) over the interval  about x=0
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04/14/22

A rectangular prism with a volume of 11.25 cubic units is filled with cubes with side lengths of 1/4 . How many 1/4 unit cubes does it take to fill the prism?
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04/14/22

PHYSICS Calorimetry QUESTION
In a calorimetry experiment, a 60 g metal sample was heated to 100oC, and then quickly transferred to a styrofoam cup with cover and containing 100 g of water at room temperature (23oC). After... more
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04/14/22

probability of Marble randomly picked
A bag contains three red marbles, two green ones, one pearl blue two yellow and three orange marbles. if you grab at random 5 marbles what is the probability that you have all red ones and the... more
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04/13/22

chemistry - strong acid
Which of the following statements about the strength of acids is correct? A. Any cation BH+ derived from a weak base B, is a strong acid. B. Any acid that dissolves well in water is a strong acid.... more
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04/13/22

State an approx. amount of chemical energy “used” by your body, in one day. Your answer should be based on a recommended dietary energy input using units relevant for biological (dietary) energy.
Calculate your average power rating in horsepower and Watts*. This should be based on the energy assumed above.When running at about 10 mi/hr, an athletic human body consumes energy at a rate of... more
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