karem

Insert some parentheses in the expression 24 : 4 + 8 : 2 +2 so that the result is: a) 3 b) 4 c) 5 d) 6

b) Two families Mäkinen* and Nieminen* travel by cars a distance of 185 km. In the middle of the travel both have a break of 20 min. During driving family Nieminen has an average speed of 90 km/h. Family Mäkinen drives the first part at an average speed o...

Our electricity bills consist of many different forms of energy use. In order to be able to make estimates on how much different appliances use electricity and how much savings could be done by investing less electricity consuming ones, you need to have u...

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 hydrocarbon: i) CH4 ii) C2H4 iii) C3H8 b) What is the amount of CO2 in grams formed by the total combustion of hydrocarbon? Assum...

An electric heater of power 2500 W is connected to a voltage of 230 V. i) Calculate the electric current going through the heater. ii) What is the resistance of the heater? iii) How much energy does it consume in a year, if it is switched on 15 min every...

We use an electric immersion heater to heat 2,0 liters water having temperature of 20C to the boiling point. Specific heat capacity of water is 4,19 kJ/(kg c). The power of the heater is 1,50 kW and efficiency of heating is 80 %. How much time does the h...

what substances present in fruits and vegetables, provides significant health benefits

Viruses, micro-organisms, and other substances that cause disease are known as A. pathogens. B. organic matter. C. inorganic chemicals. D.heavy metals.

What role did the Catholic Church play in preserving and spreading information during the Middle Ages?

it was D :(