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# Tag Archives: seconds

## The durations of a random sample of 16 commercials are below (in seconds). find the mean, median, and mode of these durations. 30, 12, 26, 7, 14, 35, 20, 30, 55, 8, 35, 18, 42, 15, 30, 10

First arrange in ascending order of time:- 7, 8, 10, 12, 14, 15, 18, 20, 26, 30, 30, 30, 35, 35, 42, 55 MOde is the value occuring mos  = 30. Median is the mean of 2 middle numbers = (20 + 26) / 2 = 23 Mean = sum …

## A machine can fill a box with twenty pencils in 30 seconds. How many boxes can the machine fill in 2 hours?

It should be 4,800 pencils in two hours.And240 boxesEdit:Details:20 pencils in 30 secmultiply all by two so we are working in min40 Pencils in 1 minmultiply it all by 602400 Pencils in an hourmultiply by two4800 in two hours Edit two:4800÷20=﻿﻿﻿240240 BOXES

## Find a model for simple harmonic motion if the position at t=0 is 0 the amplitude is 5 centimeters and the period is 4 seconds

Answer: y = 5sin Step-by-step explanation: Since harmonic motion is represented by the sine wave equation. y = a sin (bx) where a = amplitude period = Amplitude of the harmonic motion is given as 5 and period is 4 seconds. so a = 5 and 4 = ⇒ b …

## A second reaction mixture was made up in the following way: 10 mL 4.0 M acetone + 20 mL 1.0 M HCl + 10 mL 0.0050 M I2 + 10 mL H2O a. What were the initial concentrations of acetone, H+ ion, and I2 in the reaction mixture? (acetone) ___________ M; (H+) ___________ M; (I2)0 ___________ M b. It took 120 seconds for the I2 color to disappear from the reaction mixture when it occurred at the same temperature as the reaction in Problem 2. What was the rate of the reaction?

A. We can calculate the initial concentrations of each by the formula: initial concentration ci = initial volume * initial concentration / total mixture volume where, total mixture volume = 10 mL + 20 mL + 10 mL + 10 mL = 50 mL ci (acetone) = 10 mL * …

## A second reaction mixture was made up in the following way: 10 mL 4.0 M acetone + 20 mL 1.0 M HCl + 10 mL 0.0050 M I2 + 10 mL H2O a. What were the initial concentrations of acetone, H+ ion, and I2 in the reaction mixture? (acetone) ___________ M; (H+) ___________ M; (I2)0 ___________ M b. It took 120 seconds for the I2 color to disappear from the reaction mixture when it occurred at the same temperature as the reaction in Problem 2. What was the rate of the reaction?

A. We can calculate the initial concentrations of each by the formula: initial concentration ci = initial volume * initial concentration / total mixture volume where, total mixture volume = 10 mL + 20 mL + 10 mL + 10 mL = 50 mL ci (acetone) = 10 mL * …

## An airplane traveling 245 m/s east experiences turbulence, so the pilot slows down to 230 m/s. It takes the pilot 7 seconds to slow down to this speed. What is the acceleration of the plane? Round your answer to the nearest hundredth.

Answer: – 2.14 m/s^2 Explanation: initial velocity , u = 245 m/s final velocity, v = 230 m/s time taken , t = 7 second By use of first equation of motion, v = u + a t where, a be the acceleration. Substitute the values of v, u and …

## Bret kicks a soccer ball straight up into the air worth an initial velocity of 25 m/s from a height of 1 m. After how many seconds will the soccer ball land? A. 5 s B. 5.14 s C. 6.5 s D. 7 s

Bret kicks a soccer ball straight up into the air worth an initial velocity of 25 m/s from a height of 1 m. After how many seconds will the soccer ball land? A. 5 s B. 5.14 s C. 6.5 s D. 7 s

## A fireworks company has two types of rockets called Zinger 1 and Zinger 2. The polynomial -16t2 + 150t gives the height in feet of Zinger 1 at t seconds after launch. The polynomial -16t2 + 165t gives the height of Zinger 2 at t seconds after launch. If the rockets are launched at the same time and both explode 6 seconds after launch, how much higher is Zinger 2 than Zinger 1 when they explode?

A fireworks company has two types of rockets called Zinger 1 and Zinger 2. The polynomial -16t2 + 150t gives the height in feet of Zinger 1 at t seconds after launch. The polynomial -16t2 + 165t gives the height of Zinger 2 at t seconds after launch. If the …

## The function H(t) = −16t2 + 48t + 12 shows the height H(t), in feet, of a cannon ball after t seconds. A second cannon ball moves in the air along a path represented by g(t) = 10 + 15.2t, where g(t) is the height, in feet, of the object from the ground at time t seconds. Part A: Create a table using integers 0 through 3 for the 2 functions. Between what 2 seconds is the solution to H(t) = g(t) located? How do you know? (6 points) Part B: Explain what the solution from Part A means in the context of the problem. (4 points)

Given two functions: h(t)=-16t^2+48t+12 and g(t)=10+15.2tA] The table of both functions from 0 to 3 will be:h(t)=-16t^2+48t+12t           0           1            2          3h(t)       12         44   …

## The half-life of helium-5 is 7.6 x 10^-22 seconds, and the half-life of helium-9 is 7 x 10^-21 seconds. Approximately how many times greater is the half-life of helium-9 than that of helium-5?

(7X10^-21)/(7.6X10^-22)  is equal to: (7/7.6)(10^-21/10^-22) Rule for division of similar bases with exponents… (a^b)/(a^c)=a^(b-c) In this case we have (10^-21)/(10^-22)=10^(-21–22)=10^1 And 7/7.6≈0.921, and we only had two significant figures so 0.92 works 0.92X10^1 9.2 So the half life of helium-9 is about 9.2 times greater than the half life of …

## The flow of water from a water faucet can fill a 3 gallon container in 15 seconds. Give the ratio of gallons to seconds as a rate in gallons per second?

The flow of water from a water faucet can fill a 3 gallon container in 15 seconds. Give the ratio of gallons to seconds as a rate in gallons per second?

## Sasha sits on a horse on a carousel 3.5 m from the center of the circle. She makes a revolution once every 8.2 seconds. What is Sasha’s tangential speed?

Sasha sits on a horse on a carousel 3.5 m from the center of the circle. She makes a revolution once every 8.2 seconds. What is Sasha’s tangential speed?

## An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 3500 feet and Plane B is at an altitude of 2768 feet. Plane A is gaining altitude at 40.25 feet per second and Plane B is gaining altitude at 55.5 feet per second. How many seconds will pass before the planes are at the same altitude? seconds What will their altitude be when they're at the same altitude? feet

An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 3500 feet and Plane B is at an altitude of 2768 feet. Plane A is gaining altitude at 40.25 feet per second and Plane B is gaining altitude at 55.5 feet per second. …

## The rate constant for the second-order reaction 2no2(g) ? 2no(g) o2(g) is 0.540/(m · s) at 300°c. how long (in seconds) would it take for the concentration of no2 to decrease from 0.500 m to 0.250 m

Answer: The coefficient of CO₂ is 5. Explanation:     Balancing the reaction: ___C₅H₁₂ + ___O₂ → ___CO₂ + ___H₂O There are 5 C in the left side, so we put 5 on the right side: ___C₅H₁₂ + ___O₂ →  5CO₂ + ___H₂O There are 12 H in the left …

## To convert 2.7 hours into seconds, which two ratios could you multiply by?

Answer: 3 hours.           Step-by-step explanation: Let x be the time taken by shoe repairman to repair one pair. We have been given that his assistant, who takes twice as long to repair a pair of shoes. So time taken by his assistant to repair one …

## The police department is very proud of their new police cars. They announced that they are able to go from a stopped position to 80 miles per hour in 6 seconds. They are describing their cars’ velocity. direction. speed. acceleration.

The gravitational force Fg between two objects is given by the equation: Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.  Due to the gravitational attraction the pencil and the eraser will …

## 1. 7.2 aliens =1 monster. 1 monster= 15.5 oranges. Using the conversion above, about how many oranges are equal to 1 alien? 2. In a scaled drawing, 1 millimeter represents 150 meters. How many square millimeters on the drawing represents 1 square meters? 3. While driving with his father, Amit holds his breath whenever they pass through a particular tunnel. Amit counts the number of seconds he holds his breath, from the beginning of the tunnel to the end of the tunnel, and finds that he holds his breath, on average for about 8 seconds. If his father drives the car at 60 mph through the tunnel, according to the average time, Amit holds his breath, about how long is the tunnel. 4. Lea’s car travels on average of 30 miles per gallon of gas. If she spent \$20.70 on gas for a 172.5 mile trip, what was the approximate cost of gas in dollars per gallon?

127=7 (mod n) means when 127 is divided by n, the division leaves a remainder of 7. The statement is equivalent to120=0 (mod n), meaning that n divides 120. All divisors of 120 will satisfy the statement because 120 divided by a divisor (factor) will leave a remainder of 0. …

## Convert 64.32° into degrees, minutes, and seconds.

Convert 64.32° into degrees, minutes, and seconds.

## The graph indicates Linda’s walk. Which best describes the graph? Linda started out moving, and then stopped moving after 6 seconds. Linda started moving away from the start point, and then moved closer. Linda never moved the entire trip. Linda’s path results in a negative slope.

Answer: a) The time the police officer required to reach the motorist was 15 s. b) The speed of the officer at the moment she overtakes the motorist is 30 m/s c) The total distance traveled by the officer was 225 m. Explanation: The equations for the position and velocity …

## A toy rocket with a mass of 300 g takes off in a vertical direction under the influence of gravity. it burns fuel at the rate of 25 g/s. the exhaust speed of the gases is 80 m/s. what is the speed of the rocket at the end of 10 seconds?

The gravitational force Fg between two objects is given by the equation: Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.  Due to the gravitational attraction the pencil and the eraser will …

## A bowling ball weighs 7.26 kg and takes 3.64 seconds to travel the 19.2 m length of the bowling alley. assuming the velocity is constant, what is the kinetic energy of the bowling ball?

The gravitational force Fg between two objects is given by the equation: Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.  Due to the gravitational attraction the pencil and the eraser will …

## Pamela can swim under water for 51 seconds without a breath. Lucy can swim 3/5 minute and kady 8 minute. Who can stay underwater the longest?

So hmmm we’ll start off by using the decimal format for the percentage, thus 15% is just 15/100 or 0.15 and 7% is just 7/100 or 0.07 and so on notice, the concentration of alcohol in the 15% is, well, 0.15 :), so for a quantity of whatever, it’d be …

## A projectile is thrown upward so that it’s distance above the ground after t seconds is h=-16t^2 +672t. After how many seconds does it reach its maximum height?

Answer:  The correct option is (C). 10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared Step-by-step explanation:  Given that the segment AB has point A located at (8, 9). The distance from A to B is 10 units. We are …