05/22/22

When light crosses over from one medium to another, it changes its speed but the direction remains the same
TRUEFALSE
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05/21/22

If you consider a blinking light source that is receding from an observer, what happens to its wavelength?
decreasesincreasesneeds more informationremains the same
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05/21/22

Which of the following statements can describe the process of the law of induction?
increase in the number of turns in the coil increases the induced emf.decrease in magnetic field decreases the induced current.decrease in the speed of relative motion between coil and magnet will... more
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04/08/22

I need help with probability statistics!!
The lengths of births in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days.In what range would you expect to find the middle 98% of most... more
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04/06/22

capacitor question
The charge stored on each plate of a capacitor is 120 μC when it is connected to a source with a potential difference of 6.0 V. (a) What is the capacitance of the capacitor?(b) What is the... more
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04/01/22

A block slides down an incline of angle ß at a constant speed. The force pulling it down the incline is?
a) FN b) Ff c) Fgcos ß d) Fgsin ß
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03/31/22

A student averages 70% on mult choice tests. What is the probability that he misses the first 3 questions until he gets a question correct?
I think I know the answer I just want to go over it just to make sure that I am doing things correctly. I thought the answer is 30 percent but I am not sure how I am getting this answer.
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03/31/22

A sound wave travels at 343m/s with a wavelength of .12m, what is the frequency of the wave

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03/31/22

Physics quest questions
A force of 7.58 N acts on a(n) 3.2 kg object for 22.3 s. What is its change in velocity? Answer in units of m/s.
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03/29/22

A plane lands or takes off, on average once per 45 seconds at an airfield. Calculate what is the probability that in a random selected hour we notice:
1) At least 75 landings or take offs?2) Under 100 landings or take offs?
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03/28/22

2d momentum /physics

A 7.50 kg bowling ball moving6.42 m/s strikes a 1.60 kg bowlingpin at rest. After, the ball moves5.43 m/s at a 12.0° angle. What isthe y-component of the pin's finalvelocity?Can some one plz give... more
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03/28/22

Is a comma optional here?

I've been struggling with comma use in certain areas lately. After reading some advice from grammar experts in higher education, despite what we may have learned perhaps from English teachers in... more
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03/26/22

Full answer and explanation to question in description would be greatly appreciated.

A 100g brass block is heated from room temperature (24 C) to 80 C and placed in contact with an identical brass block at room temperature, in order to increase its temperature. Calculate the final... more
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03/24/22

Exponential distribution
The average time between accidents in a factory is 7 weeks.Find the probability that more than 21 weeks pass between accidents.
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03/24/22

Find the standard deviation in volumes of quart-size Hellmann's mayonnaise jars.
The actual volumes of quart-size jars of Hellmann's mayonnaise are uniformly distributed from 31.43 to 32.5 fluid ounces. Find the standard deviation in volumes of quart-size Hellmann's mayonnaise... more
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03/22/22

Proportion of standard deviation
suppose the distribution of a variable is normally distributed. what proportion of the data will be within 0.75 standard deviations of the mean?
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03/20/22

According to Masterfoods
According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly... more
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03/20/22

Use a tree diagram
Question 3 Two factories manufacture computer memory chips. Suppose that 20% of the chips from Factory I are defective and that 5% of the chips from Factory II are defective. Each week Factory I... more
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03/19/22

A manufacturing machine has a 3% defect rate. If 5 items are chosen at random, what is the probability that at least one will have a defect?

Round your answer to 4 decimal places
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03/18/22

Statistics questions
Analyzing many years of data, a car insurance company finds that its customers' claims have a mean of $250 and a standard deviation of $1000, and the distribution is skewed to the right. In a year... more
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03/17/22

The weekly sales of Honolulu Red Oranges is given by q = 1116 − 18p.
The weekly sales of Honolulu Red Oranges is given by q = 1116 − 18p. Calculate the price elasticity of demand when the price is $31 per orange (yes, $31 per orange†). ___Interpret your answer.The... more
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03/16/22

The random variable x is the number of occurrences of an event over an..
The random variable x is the number of occurrences of an event over an interval of 10 minutes. It can be assumed the probability of an occurrence is the same in any two time periods of an equal... more
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03/16/22

The total of 72 students took two courses. The table below shows the number of students in two courses according to their final grades.

A B C D F CALCULUS 10 7 8 5 6 STATISTICS 12 6 6 8 4A student is selected random. Find... more
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03/16/22

Physics: Orbital Period of an Asteroid
An asteroid is discovered in a nearly circular orbit around the Sun, with an orbital radius that is 1.89 times Earth's. What is the asteroid's orbital period in terms of Earth years?
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03/14/22

Normal Distribution
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 10.9 years and a standard deviation of 2.4 years.If the company wants to... more
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