Questions and answers by

karem

Questions (16)

What role did the Catholic Church play in preserving and spreading information during the Middle Ages?
1. 1 answer
2. 650 views
The three major global used of fresh water areA.manufacturing goods, wastewater disposal, and irrigation B. drinking, bathing,
1. 5 answers
2. 1,246 views
Viruses, micro-organisms, and other substances that cause disease are known asA. pathogens. B. organic matter. C. inorganic
1. 1 answer
2. 312 views
what substances present in fruits and vegetables, provides significant health benefits
1. 1 answer
2. 2,210 views
We use an electric immersion heater to heat 2,0 liters water having temperature of 20C to the boilingpoint. Specific heat
1. 1 answer
2. 724 views
An electric heater of power 2500 W is connected to a voltage of 230 V.i) Calculate the electric current going through the
1. 2 answers
2. 711 views
Phosphorous (P) is an indispensable nutrient in food production. According to the estimates, mineralphosphorous resources will
1. 2 answers
2. 595 views
according to the reaction below:4 NO + 3 O2 + 2 H2O → 4 HNO3 a) 0,001 g of NO dissolves into 1 liter of rainwater and all of
1. 0 answers
2. 501 views
The elementary analysis of 22 g hydrocarbon sample results in 18 g C and 4 g H.a) Choose the correct chemical formula of the
1. 1 answer
2. 758 views
Our electricity bills consist of many different forms of energy use. In order to be able to make estimateson how much different
1. 1 answer
2. 595 views
b) Two families Mäkinen* and Nieminen* travel by cars a distance of 185 km. In the middle of thetravel both have a break of 20
1. 1 answer
2. 588 views
Energy management has become a crucial field in increasing the efficiency of our everyday use of energy.One of the most energy
1. 0 answers
2. 591 views
Traffic in the cities releases NOx gases into the atmosphere (in the form of NO and NO2). NOx gasescontribute to rainwater
1. 0 answers
2. 613 views
10. ALTERNATIVE BThe elementary analysis of 22 g hydrocarbon sample results in 18 g C and 4 g H. a) Choose the correct chemical
1. 0 answers
2. 578 views
Phosphorous (P) is an indispensable nutrient in food production. According to the estimates, mineralphosphorous resources will
1. 0 answers
2. 567 views
Insert some parentheses in the expression 24 : 4 + 8 : 2 +2 so that the result is:a) 3 b) 4 c) 5 d) 6
1. 1 answer
2. 465 views