Answer:
I think the sun is the right answer
Answer:
Always equal to zero
Explanation:
In a action reaction two pair forces comes into play.
These forces are opposite in nature but equal. Suppose a pair of force is acting on any object.
Let the first force acting on one direction is -F
force acting on opposite direction = +F
If we sum these forces, -F + (+F) = 0
<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
The answer to this question would be: 1m/s
When you are walking to the north with 2m/s velocity, the stationary object(velocity=0m/s) will look like moving south at 2m/s velocity. That happens because the relative distance between you and the object is reduced by 2m/s in both conditions. In this question, the man seems like have 3m/s velocity. The real velocity should be:
3m/s - 2m/s = 1m/s
Answer:
n = 1/5 and m = 3/5
Explanation:
The given quantity is :
Where
The dimension of [A] = [LT]
The dimension of [B] = [L²T⁻¹]
The dimension of [C] = [LT²]
We need to find the dimensions of n and m values.
Using dimensional analysis,
Comparing both sides,
2n+m=1 ....(1)
-n+2m=1 ,.....(2)
Solving (1) and (2), we get :
n = 1/5 and m = 3/5
Hence, this is the required solution.