ozone machines

A machine can make 1,500 bolts in 3 hours. Which graph shows the relationship between the number of bolts produced by the machine and the time taken? => Graph 4 or Graph 3 or Graph 1 or Graph 2..

A printing machine produces 2400 newspapers in 3 hours. At this rate, how many newspapers are produced in 14 hours? => 24,000 or 4800 or 8000 or 11,200..

Two hundred bolts were selected at random from the production of 4 machines. The number of defective bolts are 4, 9, 12 and 3. At a significance level α = 0.05, find the chi-square test value and check whether there is a considerable difference between the machines..

P & R washing machine manufacturing company conducted tests on different models of washing machines before launching them into the market to know the weights (in kgs) they can withstand for a particular drum size. The results are 6, 5.5, 7, 8, 6.3 and 7.2. Find the sta..

A factory produces two types of toys A and B with the help of two machines I and II. The two machines I and II can not be used for not more than 1 1 2 hours each to manufacture the toys. The toy A requires 1 minute of machine I and 2 minutes of II, where as a toy B tak..

The table shows the capacities of three different types of lifting machines. Lifting Machine Capacity (in pounds) W1 200 W2 400 W3 600 Which is the most appropriate graph to represent the information shown in the table? => Graph 3 or Graph 2 and Graph 3h..

A shirt manufacturing company wanted to check for the number of defective shirts being produced out of a total of 100 shirts by 10 different machines in two consecutive days. The data obtained is shown here. Machines 1 2 3 4 5 6 7 8 9 10 Day I 3 7 2 4 5 1 8 4..

It has been found that 6% of the tools produced by a certain machine are defective. What is the probability that in a shipment of 500 such tools 6% or more will prove defective? => 6% or 53.98% or 3.98% or 0.54%..

Question: Noise levels in our city are at an alarming peak leading to anxiety, stress and even deafness. Taking ideas from the graph below and your own ideas, write an article about noise pollution and its effects for a children's magazine, 'Your City and You'. You are Aruna Srivastav ..

Levers of the 3 rd Order [Class III Levers] - In class III levers effort is situated between the load and the fulcrum. (shown in the figure belo..