Answer:
56400Joules
Explanation:
The quantity of heat required is expressed as;
Q = mL
m is the mass = 25g = 0.025kg
L is the latent heat of vaporization for steam = 2.256×10^6J/kg
Substitute into the formula as shown;
Q = 0.025×2.256×10^6
Q = 56400Joules
Hence the quantity of hear required is 56400Joules
Speed - the rate of change of position.
<span>Speed = Distance / Time. </span>
<span>Common units utilized for speed are meters per second (m/s) or miles per hour (mi/h). </span>
<span>Velocity - the rate of change of position. </span>
<span>Velocity = Displacement / Time. </span>
<span>Common units utilized for velocity are meters per second (m/s) or miles per hour (mi/h). </span>
<span>The main difference between speed and velocity is that speed is a scalar quantity (does not depend on direction) whereas velocity is a vector quantity (which does depend on direction). </span>
<span>Acceleration - Change of velocity over time. </span>
<span>Force = Mass x Acceleration. </span>
<span>Acceleration = Force / Mass. </span>
<span>Common used units of acceleration are meters per second squared (m/s^2). </span>
<span>Hope that helped :)</span>
Answer: initially the packet was ascending up with the balloon.
Taking upward as positive direction;
initial velocity, u = 4.9 m/s
final velocity = v m/s
initial height, h₁ = 245 m
final height, h₂ = 0
a = -9.8 m/s²
time taken = t seconds
s = ut + 0.5at²
⇒ (h₂-h₁) = ut + 0.5at²
⇒ 0-245 = 4.9t + 0.5×(-9.8)×t²
⇒ -245 = 4.9t - 4.9t²
⇒ 4.9t² -4.9t -245 =0
Solving it, we get t = 7.59s
v = u + at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/s
So velocity is 69.48 m/s downward
Explanation:
1. Each plot represents the meters traveled by both the Hare and the Tortoise over a certain period of time (minutes).
2. The Tortoise lines show it lines is steadily increasing over a period of time. So as more time elapses the faster the tortoise becomes it travels more meters. The Tortoise line shows steady acceleration.
3. The Hare in the first 5 minutes had a rapid fast advancement up to 40 meters. But for the 5-20 mins. period the Hare did not move at all. Its speed stayed at the same place. But towards the end 20-25 mins. marks the Hare started moving again. At the end the Hare at first had a rapid acceleration but stopped for a long time then it sped up briefly.
That force is what most people would call the object's "weight".
Wherever the object is, its weight is
(mass) x (acceleration due to local gravity) .
On Earth, the acceleration due to gravity is 9.8 m/s² . (rounded)
The object's weight is (20 kg) x (9.8 m/s²) = 196 newtons .
(about 44.1 pounds)
