Answer:
The different sounds
Explanation:
since it can not be changed
There are two terms
a) accuracy : it relates to the exactness of an answer that how an answer is close to the actual answer or actual reading
So 104.6 is accurate
b) Precision : This is related to the closeness of different readings with each other
The first reading is 103.7 and the second one is 108.4 so the second reading is quite different from the first reading so it cannot be called as precised
Again 105.8 has good difference from the second reading hence again this is not precised
However the last reading 104.6 is quite near to 105.8 so 104.6 can be called as precise
Answer:
0.725 kg
Explanation:
Step 1: Given data
- Kinetic energy of the softball (K): 145 J
- Speed of the softball (v): 20.0 m/s
- Mass of the softball (m): ?
Step 2: Calculate the mass of the softball
We will use the following expression.
K = 1/2 × m × v²
m = 2 K / v²
m = 2 × 145 J / (20.0 m/s)²
m = 0.725 kg
The mass of the softball is 0.725 kg.
Answer:
0.00446 grams of hydrogen are produced.
Explanation:
Atmospheric pressure at which hydrogen gas was collected = p= 742.1 mmHg
Vapor pressure of the hydrogen gas = p' = 22.4 mmHg
Pressure of the hydrogen gas = P
P = p - p' = 742.1 mmhg - 22.4 mmhg = 719.7 mmHg
719.7 mmHg =
1 atm = 760 mmHg
Volume of the hydrogen gas ,V = 57.48 mL = 0.05748 L
1 mL =0.001 L
Temperature of the hydrogen gas = T = 24°C=24+ 273 K = 297 K
Moles of hydrogen gas = n
( Ideal gas equation)
n = 0.00223 mol
Mass of 0.00223 moles of hydrogen gas:
0.00223 mol × 2 g/mol = 0.00446 g
0.00446 grams of hydrogen are produced.
I think that the correct answer is A