Answer:
1.27 Mega watt approx
Explanation:
Given data
Mass= 0.5kg
c= 4200 J/kg °C
T1= 100°C
Time = 2 hours >>>> 7200 seconds
From the given data the water is already at the boiling point
Hence if continuous heat is being added the latent heat of vapourization will result, the latent heat of vaporization is about 2,260 kJ/kg
Q= mL
Q= 0.5*2,260
Q = 1130kJ
Power= Energy * Time
Power= 1130* 1130
Power= 1.27mega watt approx
Data:
a) v = 84 m/s
r = 225 m
Ac =?
b) Ac = 9.8 m/s^2
v = ?
Formula: Ac = v^2 / r
Solution
a) Ac = (84 m/s)^2 / (225 m) = 31.36 m/s^2
To measure it in terms of g, divide by g = 9.8 m/s^2
=> Ac = 31.36 m/s^2 / [ 9.8 m/s^2 / g] = 3.2 g
Answer: Ac = 3.2 g
b) Ac = 9.8 m/s^2
v^2 = Ac * r = 9.8 m/s^2 * 225 m = 2,205 m^2 / s^2
=. v = 46.96 m/s ≈ 47 m/s
Answer: 47 m/s
Answer:
-21.6 m/s^2
Explanation:
First of all, we need to convert the initial and final velocities into m/s:
is the initial velocity
is the final velocity
The acceleration is given by
where
t = 90 s is the time elapsed
Substituting the numbers, we find
and the negative sign means the rocket is decelerating.
Answer:
yes mate you are right but what is your question
Answer:
<h2>
30 miles/hour, and 2.24 miles/hour</h2>
Explanation:
What is average speed?
It is the total distance traveled divided by the time taken to cover the total distance traveled
Given that the various distances are
20 miles and 10 miles
the total distance traveled is 20+10= 30 miles
the average speed is expressed as
average speed= total distance/time taken
average speed= 30/1
average speed= 30 miles/hour
The average velocity is a vector quantity
the velocity is the average displacement divided by time taken
average velocity= displacement / time
average velocity= 2.24 /1
average velocity= 2.24 miles/hour