Answer:
The energy consumption by toaster oven is 432 kJ and that of fluorescent light (CFL) bulb is 435 kJ.
Explanation:
Power of toaster oven, P = 1.2 kW
Time, t = 6 minutes = 360 s
The energy used by toaster oven is given by :
Power of fluorescent light (CFL) bulb, P' = 11 W
Time, t' = 11 h = 39600 s
Energy used by fluorescent light (CFL) bulb is given by :
So, the energy consumption by toaster oven is 432 kJ and that of fluorescent light (CFL) bulb is 435 kJ.
Answer:
it take 687 days for Mars orbit around the sun
The chemical properties depend on the number of valence shell electrons since these electrons participate in chemical bond formation with other elements. The elements are arranged in the periodic table in such a way that the elements having same number of electrons in the valence shell are grouped together.
Therefore the chemical properties of the elements present in the same group are similar. As for example the halogens (Group VII) made up of fluorine, chlorine, bromine, iodine and astatine. In fact since they all seven electrons in the valence shell they are therefore called halogens. All halogens exhibit similar chemical properties. It is true for all other groups.
The physical properties like melting point , boiling point partially depend on the valence shell and it also depends on the type of interactions between the atoms of the element. Thus to some extent it shows similarity along a group.
The height is proportional to the kinetic energy of the
projectile. So the ratio of the two KEs is 5.4/2.2 = 2.45.
KE is proportional to velocity squared, so velocity is proportional to the
square root of the KE, which is √2.45 = 1.57, which is the answer.
To explain it more in detailed:
KE = PE = mgh, which displays you the KE and height proportionality.
KE = ½mV² or
V = √(2KE/m) which shows you the other proportionality
combining
V = √(2mgh/m) = √(2gh)
V₁/V₂ = √(2gh₁) / √(2gh₂) = √(h₁/h₂) = √(5.4/2.2) = 1.57
Answer: East
Explanation: Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.
