Time - high school - practice problems
Number of problems found: 613
- This year
This year 2020, is a leap year. How many leap years had there been since 1904? - An aircraft 2
An aircraft jet engine has a thrust of 80 kN. What impulse is produced in 30 s? - Two pendulums
In 24 s, the first pendulum performed 12 oscillations and the second 16 oscillations. Determine the periods and frequencies of both pendulums. - Bulbs
The probability that the bulb can operate 4000 hours is 0.3. What is the probability that exactly one of the eight bulbs can operate 4000 hours? - Possibilities 36911
There are seven fountains in the city. Only five always work. How many possibilities do five fountains work at the same time? - Determine 2426
Determine the first nine members of the sequence if a 10 = -8, q = -1. - Wavelength
Calculate the wavelength of the tone frequency 11 kHz if the sound travels at speeds of 343 m/s. - Range, mean, median
The ages of 7 employees in an office are given below 32, 42, 30, 32, 33, 23, 32 Find a) Range b) Mean c) Median - Stationary 57031
Determine the distance of a stationary satellite from the Earth's surface. - Giraffe 2
The lifespan of a guinea pig is six years less than that of a giraffe. The lifespan of a tiger is four times that of a guinea pig. If the total lifespan of the animals is 30 years, calculate the longevity of the giraffe. - Free fall
The free fall body has gone 10m in the last 0.5s. Find the body speed at the moment of impact. - Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones? - The tangent of the hyperbola
Write the equation of the tangent of the hyperbola 9x²−4y²=36 at the point T =[t1,4]. - Greatest angle
Calculate the greatest triangle angle with sides 124, 323, 302. - The change
The change in momentum of an unknown object was 56 Ns. What was the force applied when it moved a distance of 2m in 10 seconds? - Double of principal
How long will it take for the principal to double at 12.25% annual interest? - Pooja
Pooja and Deepa's age is 4:5, and four years back, it was 8:11. What is the age of Pooja now? - Radioactivity
After 548 hours decreases, the activity of a radioactive substance to 1/9 of the initial value. What is the half-life of the substance? - The usage
The battery usage time installed in a particular smartphone has a Normal distribution with a mean of 25.2 hours and a standard deviation of 7.5 hours. What is the probability of usage time greater than 32? - Simple interest 3
Find the simple interest if 11928 USD at 2% for 10 weeks.
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