Square practice problems - page 40 of 153
Number of problems found: 3052
- The coil 2
The coil of a moving coil voltmeter is 40 mm long, 30 mm wide, and has 100 turns. The control spring exerts a torque of 240 x 10-6 N-m when the deflection is 100 divisions on a full scale if the flux density of the magnetic field in the air gap is 1.0 Wb/ - Hydrostatics
A) Calculate the hydrostatic pressure at the bottom of the Mariana Trench. The density of seawater is 1,030 kg/m³. What depth do you need to look up in an atlas or on the Internet? B) Calculate the pressure force acting on a submarine with a surface area - Dentist
A doctor lifts a chair with a patient using a hydraulic device. The area of the smaller piston is 5 cm². The area of the larger piston is 200 cm². The mass of the chair is 30 kg, the mass of the patient 100 kg. Will the doctor lift the chair with the pati - Arithmetic sequence
Determine the sum of the first 12 terms of an AP (arithmetic sequence) if a4 is equal to 7 and a8 is equal to minus 1. - Airport 4
The airport in Košice collected the following data on aircraft delays within one week: (Solve the following tasks without classification into intervals. Round the results to 2 decimal places) Aircraft delay in min.: 541; 545; 575; 520; 572; 544; 524; 567; - Complaints
The table is given: days; complaints 0-4; 2 5-9; 4 10-14; 8 15-19; 6 20-24; 4 25-29; 3 30-34; 3 1.1 What percentage of complaints were resolved within two weeks? 1.2 calculate the mean number of days to resolve these complaints. 1.3 calculate the modal nu - Pupils' exercise
On part of the school playground there are embedded markers. Neighbouring markers are 60 cm apart from each other and form a square grid. The teacher said: line up on the markers in rows of three. Change places into rows of four. Stand in rows of six. We - Diophantus
We know little about this Greek mathematician from Alexandria, except that he lived around the 3rd century A.D. Thanks to an admirer who described his life through an algebraic riddle, we know at least something about it. Diophantus's youth lasted 1/6 of - Respondents - chi-square
Asked respondents answered a question about their average net monthly wage. The given answers are in thousands €: 0.40; 0.60; 0.55; 0.68; 0.63; 0.70; 0.65; 0.75; 0.91; 0.63; 0.38; 0.39; 0.38; 0.74; 1.25; 1.10; 1.30; 1.15; 1.18; 1.13; 1.15; 1.19; 1.21. Usi - Precious metals
From 2006-2009, the value of precious metals changed rapidly. The data in the following table represent the total rate of return (in percentage) for platinum, gold, and silver from 2006 through 2009: Year Platinum Gold Silver 2009 62.7 25.0 56.8 2008 -41. - Fraction of a time
Express a fraction of what a 24-hour portion is, 80 minutes. - Repeatition not allowed
How many four-digit numbers can be formed from the digits 3, 5, 8, and 9 if no digit may be repeated? - BMI index
Calculate BMI (body mass index, an index indicating obesity, overweight, normal weight, underweight) man weighing m = 85 kg and height h = 152 cm. The index is calculated according to the equation (formula): BMI = (m)/(h²) With the BMI index, it is possib - Sequentially pick
There are 6 different tickets marked with numbers 1 to 6 in the pocket. In how many different ways can we sequentially, taking into account the order, choose three of them, if the chosen tickets return to the pocket? - Remainders
It is given a set of numbers { 200; 261; 331; 345; 487; 554 }. Divide these numbers by number 80 and determine a set of remainders. As a result, write the sum of these remainders. - Suppose 4
Suppose that 14% of all steel shafts produced by a certain process are nonconforming but can be reworked (rather than having to be scrapped). Consider a random sample of 200 shafts, and let X denote the number among these that are nonconforming and can be - Parking
One hundred twenty vehicles are parked in the morning. Passenger car is charged 20 CZK and 50 CZK per bus. The guard collected for parking 2640 CZK in total. How many cars and buses stood in the parking? - Stoaches Stoaches are fictional creatures distantly related to bigfoot and yeti. Stoach weights are normally distributed, with a mean of 904 g and a standard deviation of 104 g. State the probability that the sample mean of a random sample of 36 stoach weights exc
- Acceleration - free fall
How long will it take for a car to reach a speed of 180 km/h with an acceleration of 10 m/s²? - Reconstruction of the corridor
Calculate how many minutes the travel time will be reduced on a 213 km long railway corridor if the maximum speed increases from 120 km/h to 160 km/h. Calculate how many minutes the travel time will be shortened if the train must stop at 6 stations, decel
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