Recent content by penza

Express the following quantities as an ordinary decimal number: a) The sun has a diameter of 1.392 * 10^6 I get 1392000. b) 8.4*10^-6 I get 0.000084 Is this right

1) Write 2^2 * 3 * 5 as a natural number? I get 60 is it right or should i put 4*3*5= 60 2) Write 420 as the product of its prime factors in exponent form? What do i have to do ?

the most common way i don't know...and the frequency of beat is 1/F

Which one of the following situations could result in a standing wave? A- Two waves with different frequencies moving in the same direction. B- Two waves with different frequencies moving in opposite direction. C- Two identical waves moving in opposite directions D- Two identical waves...

ok got it thank you

yeh but what do you to find the power

for question B i thought that because they have to install a turbine, looking that the density of water is 1000 than you have to do 1000/6 which is the flow rate so then to find the estimated power

ho yeh so actually the energy changes are from potential energy ---> kinetic energy, so that's actually the answer... thank you

actually first i thought what energy transfer and i put 75/6 and but then i thought you just have to explain meaning that it goes from vaporisation to convection

for sure i thought about it but i don't know...

I have two questions a)Water flows over a waterfall of height 75m of volume flow rate 6.0ms-1 and then lands in a pool below. Outline the energy changes that take place b)It is suggested that installing a turbine of the waterfall could provide a source of electrical energy. Estimate the...

I had problems with the gravity option someone has any webiste to give me for help , thanks (waves would be also good)