Answer:
313.6 m
Explanation:
From the question given above, the following data were obtained:
Time (t) = 8 s
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) =?
The height at which the package was dropped can be obtained as follow:
h = ½gt²
h = ½ × 9.8 × 8²
h = 4.9 × 64
h = 313.6 m
Thus, the package was at a height of 313.6 m when it was dropped.
Answer:
True. Gold does have a higher density than tin
<h2>
It takes 0.867 seconds to get to the top of its motion</h2>
Explanation:
We have equation of motion v = u + at
Initial velocity, u = 8.5 m/s
Final velocity, v = 0 m/s - At maximum height
Time, t = ?
Acceleration , a = -9.81 m/s²
Substituting
v = u + at
0 = 8.5 + -9.81 x t
t = 0.867 s
It takes 0.867 seconds to get to the top of its motion
Ep = F * d
F = 20 N
d = 5 m
Ep = 20 N * 5 m
Ep = 100 J
So pick B. A Newton Meter is a joule.
Answer:
Amount of necessary heat transfer, q = 
Given:
Volume of liquid Nitrogen, V = 0.200 
Density of liquid Nitrogen, 
Temperature, 
Temperature Rise, T' = 
Latent heat of Vaporization, 
Specific heat capacity of gas, 
Solution:
Now, calculation of heat transfer required to evaporate liquid nitrogen and raise its temperature is given by:
(1)
Now, mass, m can be given by:
Now, from eqn (1):
q =
