The width of the playroom is 4 m
Answer:
B) 1.2 N, toward the center of the circle
Explanation:
The circumference of the circle is:
C = 2πr
C = 2π (0.70 m)
C = 4.40 m
So the velocity of the ball is:
v = C/t
v = 4.40 m / 0.60 s
v = 7.33 m/s
Sum of the forces in the radial direction:
∑F = ma
T = m v² / r
T = (0.015 kg) (7.33 m/s)² / (0.70 m)
T = 1.2 N
The tension force is 1.2 N towards the center of the circle.
Atmosphere is one but that’s all I know
Answer:
1mole of Argon contains 6.022x10^23atoms
3moles will contain
3x6.022x10^23atoms
1 atoms of Argon contains 18electrons
3x6.022x10^23atoms will contain...
3x6.022x10^23 x 18electrons
= 3.252x10^25electrons
Note:In a Neutral Argon... No of Electrons and Protons(positive charge) are the same
From Charge Quantization Principle
Q=ne
n=3.252x10^25protons
e=1.6x10^-19C
Q=3.252x10^25 x 1.6x10^-19
Q=5.2x10^6C
Answer:
The optimum length of the antenna is 2.27 m
Explanation:
Given:
Broadcasting frequency Hz
From the formula of wavelength in terms of frequency,
Where speed of light
m
For finding the length of antenna,
m
Therefore, the optimum length of the antenna is 2.27 m