Answer:
here on the surface of moon the gravity decreases so the frequency of oscillation will also decrease
Explanation:
As we know that frequency of oscillation of the simple pendulum is given as
here we know
g = acceleration due to gravity at the surface of the planet
L = length of the pendulum
Now we know that the pendulum is on the surface of earth then gravity is given as
now when same pendulum is taken to the surface of the moon then we have
so here on the surface of moon the gravity decreases so the frequency of oscillation will also decrease
<span>2. For each pair of substances, identify the substance that will take more energy to heat from 20C to 100C and explain why. Specific heat for water- 4180 J/kg°C. Specific Heat for silver- 235 J/kg°C. Specific heat for iron-450 J/kg°C.
a. 30 g of water vs. 300 g of water
Q = mcp</span>ΔT
Q(water) = (0.03kg)(4180 J/kg°C)(100-20)
<span>Q(water) = 10,032 J
</span>Q(water) = (0.3kg)(4180 J/kg°C)(100-20)
Q(water) = 100,320 J
<span>300g of water takes mroe heat than 30g of water.
b. 500 g of iron vs. 500 g of silver
</span>Q = mcpΔT
Q(iron) = (0.5g)(-450 J/kg°C)(100-20)
Q(iron) = -18,000J
Q(silver) = (.5g)(-235 J/kg°C)(100-20)
Q(silver) = -9,400J
Iron gives off more heat than silver
Well since you can only heat your home/water with it and your home stove is less efficient than say the zero-emmisions one in gillete WY. and the distribution cost placed on top of that. you would pay more than the coal-made-electricity. plus you would burn more for the same effect. and coal decomposes in oxygen so that's not EPA condoned anymore. so the answer is. . . none. its more advantageous to just use the electricity
Answer:
As b ∝ (L/r²) and
the distance of the sun from the earth is 0.00001581 light years
and
the distance of the Sirius from the earth is 8.6 light years
hence,
the Sun appear brighter in the sky
Explanation:
The brightness (b) is directly proportional to the Luminosity of the star (L) and inversely proportional to the square of the distance between the star and the observer (r).
thus, mathematically,
b ∝ (L/r²)
now,
given
L for sirius is 23 times more than the sun i.e 23L
now,
the distance of the sun from the earth is 0.00001581 light years
and
the distance of the Sirius from the earth is 8.6 light years
thus,
using the the relation between conclude that the value of brightness for the Sirius comes very very low as compared to the value for brightness for the Sun.
hence, the sun appears brighter
One reason that it would be appropriate to talk on your cell phone, could be reporting an accident. For instance, a car crash, a sign in the road anything regarding safety of drivers.