Answer:
<h3>16,071.42J/kgK</h3>
Explanation:
The formula for expressing the quantity of heat released is expressed as;
Q = mcΔt
m is the mass of the substance = 100g - 0.1kg
c is the specific heat capacity of the substance
Δt is the change in temperature = 13 -(-15) = 28°C
Substitute and get c;
45000 = 0.1c(28)
2.8c = 45000
c = 45000/2.8
c = 16,071.42J/kgK
Hence the specific heat capacity of the substance is 16,071.42J/kgK
Answer:
Air Resistance
Explanation:
If you were to drop both items on a plant without an atmosphere, they would both hit the ground at the same time. Since a feather doesn't have much mass compared to the hammer, it takes more time for the feather to "push" itself through and overcome the opposite push from the air
(a) When the spring is compressed 4.5 cm = 0.045 m, it exerts a restoring force on the block of magnitude
<em>F</em> = (1900 N/m) (0.045 m) = 85.5 N
so that at the moment the block is released, this force accelerates the block with magnitude <em>a</em> such that
85.5 N = (1.15 kg) <em>a</em> ==> <em>a</em> = (85.5 N) / (1.15 kg) ≈ 74.3 m/s²
The block reaches its maximum speed at the spring's equilbrium point, and this speed <em>v</em> is such that
<em>v</em> ² = 2 (74.3 m/s²) (0.045 m) ==> <em>v</em> = √(2 (74.3 m/s²) (0.045 m)) ≈ 2.59 m/s
(b) There is no friction between the block and plane, so the block maintains this speed as it slides over the edge. At that point, it's essentially in free fall, so if <em>y</em> is the height of the plane, then
(7 m/s)² - (2.59 m/s)² = 2<em>gy</em> ==> <em>y</em> = ((7 m/s)² - (2.59 m/s)²) / (2<em>g</em>) ≈ 2.16 m
Answer:
1.5 X 10^-14
Explanation:
There are 1 X 10^-18 kg is 1 fg
Do the 1 X 10^-18 * 15000
<span>BAKING A CAKE </span>
Chemical
change is a process where a current substance changes or is made into a new
type of substance. Unlike the physical change, which is reversible. Chemical change stays into a its new form. Take for
instance these -physical change- examples, making ice cubes. The process involves solidification or freezing
where the water becomes ice or solid but when it melts back to its original or typical
form with respect to temperature, it’s still water. When the paper is cut into
pieces it isn’t burned or exposed to a stimuli that can trigger immediate
change in its composition. It’s still the same. On the contrary, baking a cake involves
these different compositions or substances –flour, egg, yeast and etc. that is
baked to a cake, a newly formed unified substance of all the included
ingredients.