Norrie sees two lights flash at the same time, then one of them flashes every 4th...

Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second. How many times do they flash together during a whole minute?

Expert Solution

Let us assume Norrie sees two lights flash at the same time at 'time'=0 sec.

Frequency of first flash (I) = Every 4th second.

Frequency of second flash (II) = Every 5th second.

Let us assume the two flashes will simultaneously occur after 't' seconds.

To calculate the time 't' we need to take the LCM of 4 and 5.

( LCM is Least common multiple and it is defined as the smallest number that is a multiple of both 4 and 5 here )

LCM of 4 and 5 = 20

( As you can see 20 is the smallest number that is a multiple of 4 and 5).

so the flashes will occur simultaneously after every 20 seconds.

Now according to the problem posed by the question we need to find how many times flashes will occur together in 1 minute.

1 minute = 60 seconds

so number of flashes that occur together within 1 minutes will be = = 3 Times.

So the final answer is both the flashes will occur together 3 Times in whole 1 minute.

milcah answered 4 months ago

Two lights separated by 2400 meters flash at the same time. An observer in reference frame...

Two lights separated by 2400 meters flash at the same time. An observer in reference frame Q observes the flashes simultaneously. What is the velocity of the reference frame Q?

Observer A sees a flash of blue light at position x1 = 10.4m and at time...

Observer A sees a flash of blue light at position x1 = 10.4m and at time t1 = 0.124µs, and a flash of yellow light at position x2 = 21.3m and at time t2 = 0.139µs. Observer B, who is in motion relative to Observer A, sees these flashes of light occur simultaneously. At what speed is Observer B traveling relative to Observer A?

Drop two sheets of notebook paper to the ground at the same time, one of them...

Drop two sheets of notebook paper to the ground at the same time, one of them open and the other crumpled up tightly. Drop the crumpled sheet and a stone at the same time. Drop a pebble and a large stone at the same time. Explain the results.

Consider two firms that are the same in every aspect, except one is levered and the...

Consider two firms that are the same in every aspect, except one is levered and the other is unlevered. The Federal Reserve announces that it will lower the benchmark interest rate in response to the pandemic. How will this affect the value of the levered firm and the unlevered firm? Explain the effects on each firm separately.

For every trial, the waves travel for exactly the same amount of time to the same...

For every trial, the waves travel for exactly the same amount of time to the same point from each of the speakers. Does't that mean every "Wave state" should be a "trough?" Explain. What is the essential difference between your data focused on the destructive interference and the data focused on the constructive interference?

This is the third time im submitting this question as no one will answer the 4th...

This is the third time im submitting this question as no one will answer the 4th question. Part 4) this has not been answered on chegg yet. the response you gave to this was also not to part 4. please answer the very last question in relation to portfolio construction A newly issued bond has the following characteristics: Par value = $1000 Coupon rate = 8% Yield to Maturity = 8% Time to maturity = 15 years Duration = 10...

1. Suppose two automobiles leave from the same point at the same time. If one travels...

1. Suppose two automobiles leave from the same point at the same time. If one travels north at 60 miles per hour and the other travels east at 45 miles per hour, how fast will the distance between them be changing after 3 hours? 2. Find the critical values of , find the intervals on which f(x)is increasing and decreasing, and any local maximum or minimum values. Critical values? Increasing on? Decreasing on? Max? Min? Please show all work.

Suppose that you’re comparing two companies in the same industry that are the same in every...

Suppose that you’re comparing two companies in the same industry that are the same in every way except their profitability. Company A Company B Shareholder’s Equity $100m $100m Invested Capital $100m $100m Return On Equity 12% 4% Cost of Equity 8% 8% Begin with a simple comparison: Value each of these companies assuming that the ROEs provided above are sustainable, and that both companies have a sustainable growth rate = 0%. What is the value of...

Two reflecting telescopes have the same angular resolution, but one of them uses visible light, and...

Two reflecting telescopes have the same angular resolution, but one of them uses visible light, and the other uses infrared. Which telescope must have the larger primary mirror?

(b) Professor GeniusAtCalculus has two lecture sections (A and B) of the same 4th year Advanced...

(b) Professor GeniusAtCalculus has two lecture sections (A and B) of the same 4th year Advanced Calculus (AMA 4301) course in Semester 2. She wants to investigate whether section A students maybe ”smarter” than section B students by comparing their performances in the midterm test. A random sample of 12 students were taken from section A, with mean midterm test score of 78.8 and standard deviation 8.5; and a random sample of 9 students were taken from section B, with...

Question