Answer:
Explanation:
density (d) = 1.3 kg/m³
volume of the room (v)
= 5 m * 4m * 3 m
= 60 m³
mass(m) =?
now we know density is defined as mass per unit volume so
d = m / v
1.3 = m / 60
m = 78 kg
Answer:
Explanation:
energy density can be obtained as
Where,
E is electric field 
K COLOUMB CONSTANT =8.99*10^{9} N -m2 /C2
Q is charge = CV
C is capacitance = 
![=4\pi *8.85*10^{-12} [\frac{10.5*16.5}{16.5 -10.5}]](https://tex.z-dn.net/?f=%3D4%5Cpi%20%2A8.85%2A10%5E%7B-12%7D%20%5B%5Cfrac%7B10.5%2A16.5%7D%7B16.5%20-10.5%7D%5D)
![Q = 3.21*10^{-9} *150 = 4.81*10^{-7] C](https://tex.z-dn.net/?f=Q%20%3D%203.21%2A10%5E%7B-9%7D%20%2A150%20%3D%204.81%2A10%5E%7B-7%5D%20C)
for r = 10.6 cm
E = 2568.34 N/C
Answer:
Solutions, colloids and suspension.
For this problem, you would use the equation v=u+at. In this case, u=1 v=0 (when the object is at rest) a=-1
v=u+at
0=1+(-1)t
t=1 second
Answer:
25.6 m/s
Explanation:
Draw a free body diagram of the sled. There are two forces acting on the sled:
Normal force pushing perpendicular to the hill
Weight force pulling straight down
Take sum of the forces parallel to the hill:
∑F = ma
mg sin θ = ma
a = g sin θ
a = (9.8 m/s²) (sin 38.0°)
a = 6.03 m/s²
Given:
v₀ = 0 m/s
a = 6.03 m/s²
t = 4.24 s
Find: v
v = at + v₀
v = (6.03 m/s²) (4.24 s) + (0 m/s)
v = 25.6 m/s
