04/08/20

Physics help polarization
Unpolarized light with an intensity of 22.4 lux passes through a polarizer whose transmission axis is vertically oriented. (a) What is the direction of polarized beam and intensity of the... more
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04/07/20

Help me out ! Calculus question
Find the  area inside the outer loop and outside the inner loop of the limacon r = 4 sin θ - 2
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03/31/20

What is coefficient for static friction

A 6-g bullet is shot into a 2.1-kg block of wood, where it becomes embedded. The block is initially at rest and the bullet has an initial velocity of 400 m/s. The block then travels 1.2 m... more
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03/27/20

A round loop of wire carries a current of 100 A, has a radius of 10 cm, and its normal (vector) makes an angle of 30∘ with a magnetic field of 0.324 T.
1)What is the torque on the loop? 2)What is the torque on the loop if the angle decreases to 10∘? 3)What is the torque on the loop if the angle increases to 50∘?
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03/27/20

A square loop 10 cm on a side consists of 100 turns of wire that experiences a minimum torque of zero and a maximum torque of 0.060 N⋅m.
If the current in the loop is 2.82 A, calculate the magnetic field strength that the loop rests in. 
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03/24/20

y varies directly as x. If y = 6 when x = 3, find y when x = -33
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03/19/20

A child pulls a 13.4 kg wagon across a level floor, causing it to accelerate at 6.2 m/s^2. If the force of friction between the wheels and the wagon is 5.7 N, what is the force applied by the child?

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03/19/20

A net force of 1.7 Newtons gives an object an acceleration of 3.2 m/s^2. What force would be required to give the same object an acceleration of 2.6 m/s^2?
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03/19/20

Calculus Question
Use the given data to find the values of the cosine of (A + B) and of (A – B). Give the quadrant in which each of the angles (A + B) and (A – B) terminates. Angle A in Quadrant II, tan A = -12/5 ,... more
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03/01/20

Statistics- The central limit theorem

A particular fruit's weights are normally distributed, with a mean of 772 grams and a standard deviation of 7 grams.If you pick 13 fruit at random, what is the probability that their mean weight... more
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02/16/20

Probabilities of draw without replacement

An urn contains 3 white balls and 9 orange balls. If Sam chooses 8 balls at random from the urn, what is the probability that he will select white2 balls and 6 orange balls? Round your answer to 3... more
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02/08/20

Differential equations
A series RLC circuit with R = 6 ohm, C = 0.02 Farad and L = 0.1 has no applied voltage. Find the subsequent current in the circuit if the initial charge, on the capacitor is q° and the initial... more
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01/16/20

Consider a binomial experiment with n = 6 trials where the probability of success on a single trial is p = 0.05. (Round your answers to three decimal places.)

Consider a binomial experiment with n = 6 trials where the probability of success on a single trial is p = 0.05. (Round your answers to three decimal places.) (a) Find P(r = 0). (b) Find P(r ≥ 1)... more
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12/04/19

How do you find these?

Sample mean, xbar= ∑(x) / n sample variance, s2=∑(x-xbar)2 / n-1 sample std dev, s=√s2 margin of error could you give examples??
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12/04/19

Find a 90% confidence interval for the difference μ1−μ2 of the means (rounded to 4 decimal places)
Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given... more
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12/03/19

D Operators - Differential Equations

Using D Operator method find the general solution of the differential equation,d^y/dx^2 - 2dy/dx + 2y = 1
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11/06/19

Speed of sound through Ice
What is the speed of sound through ice? (Bice = 8.8 x 109 Pa, ρice = 920 kg m-3)
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10/24/19

using implicit differentiation find y' of x^2 -3^y +7xy=8y^5. I understand everything except for the 3^y part. PLEASE HELP!
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10/23/19

antiderivative of f(x) = 4x + sin x ?
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10/21/19

Normal Distribution
For a standard normal distribution, given :P(z<c) = 0.5851Find c.
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09/13/19

use the intermediate value theorem to show that there is a root of the equation in the specified interval

e^x=3-2x, (0,1)
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09/08/19

How do you find this second derivative?
f(x)= (7e^x)/(7e^x+6)f''(x) = ? I'm able to derive the 1st derivative using the quotient rule, coming out to (42e^x)/((7e^x+6)^2)but am unable to get the 2nd derivative using the quotient rule... more
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08/30/19

sum and product which both equal to 26
Find a pair of numbers whose sum and product are both equal to 26(Use symbolic notation and fractions where needed. Give your answer in the form of a comma separated list.)
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08/29/19

please help with this function
if f(x)= 4x^3+Ax^2+7x-3 and f(2)=1, what is the value of A?
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08/24/19

Related to first law of thermodynamics
An insulated tank initially contains 0.25 kg of a gas with an internal energy of 200 KJ/kg. Additional gas with an internal energy of 300 KJ/kg and an enthalpy of 400 KJ/kg enters the tank until... more
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