Answer: 7.71 grams
Explanation:
Half-life of strontium-90 = 28 years
First we have to calculate the rate constant, we use the formula :
Now we have to calculate the age of the sample:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = age of sample = 174 years
a = initial amount of the reactant = 50 g
a - x = amount left after decay process = ?
Now put all the given values in above equation, we get
Thus amount left after 174 years is 7.71 grams.
Answer:
The fundamental resonance frequency is 172 Hz.
Explanation:
Given;
velocity of sound, v = 344 m/s
total length of tube, Lt = 1 m = 100 cm
height of water, hw = 50 cm
length of air column, L = Lt - hw = 100 cm - 50 cm = 50 cm
For a tube open at the top (closed pipe), the fundamental wavelength is given as;
Node to anti-node (N ---- A) : L = λ / 4
λ = 4L
λ = 4 (50 cm)
λ = 200 cm = 2 m
The fundamental resonance frequency is given by;
Therefore, the fundamental resonance frequency is 172 Hz.
GPE=mgh
m= 12.5kg
g= 9.81 always
h=?
568=12.5*9.81*h
Solve for h
You will get 4.63m
Answer:
Biotic factors are the living component of an environment while abiotic factors are the non living component of an environment.
Biotic factors of Mono lake include plants, animals, fungi, algae and bacteria
Abiotic factors of Mono lake include sunlight, temperature, moisture, wind or water currents, soil type, and nutrient availability.
While the biotic and abiotic factors on Land inhabited by humans including Me are :
Biotic factors-Plants ,animals, bacteria
Abiotic factors-Sunlight, heat/ temperature, Climate, weather, water sources.
Answer:
A, The net force applied to it is zero.
Add-on:
i hope this helped at all. sorry if its incorrect.