Answer:
Number of Significant Figures: 3
The Significant Figures are 3 0 5
This is because the three zeros are considered trailing zeros because they're not between two numbers or after. Zeros attached to the beginning of a number in this way are called leading zeros. In decimals, this idea of zeros that don't add value to a number can be extended to trailing zeros. A trailing zero is any zero that appears to the right of both the decimal point and every digit other than zero.
Explanation:
Trailing zeros (zeros after non-zero numbers) in a number without a decimal are generally not significant (see below for more details). For example, 400 has only one significant figure (4). The trailing zeros do not count as significant. Trailing zeros in a number containing a decimal point are significant.
Answer:
The value is
Explanation:
From the question we are told that
The molar mass of hydrazine is
The initial temperature is
The final temperature is
The specific heat capacity is
The power available is
The mass of the fuel is
Generally the number of moles of hydrazine present is
=>
=>
Generally the quantity of heat energy needed is mathematically represented as
=>
=>
Generally the time taken is mathematically represented as
=>
=> t = 2480505.6377 s
Converting to hours
=>
I did 25m/ 2.5s which is 10 m/s. not exactly sure tho
Answer:
The acceleration of the sprinter is 1.4 m/s²
Explanation:
Hi there!
The equation of position of the sprinter is the following:
x = x0 + v0 · t + 1/2 · a · t²
Where:
x = position of the sprinter at a time t.
x0 = initial position.
v0 = initial velocity.
t = time.
a = acceleration.
Since the origin of the frame of reference is located at the starting point and the sprinter starts from rest, then, x0 and v0 are equal to zero:
x = 1/2 · a · t²
At t = 9.9 s, x = 71 m
71 m = 1/2 · a · (9.9 s)²
2 · 71 m / (9.9 s)² = a
a = 1.4 m/s²
The acceleration of the sprinter is 1.4 m/s²