Answer: I'll help you when i end school
Explanation: ok
Answer:
a) 11.21 m/s
b) 513.89 N
Explanation:
mass of addict = 77 kg
radius of circle= 10 m
velocity of circular motion v =5.6 m/s
a)time period of motion
T= 2πr/v = 2×3.14×10/5.6 = 11.21 sec
b) At the highest point normal reaction force F_N is upward
the gravitational force F_g is downward and centripedal force mv^2/r is upward
F_N= F_g - mv^2/r
= 77*9.81- 77*5.6^2/10
= 513.89 N
<span>Ναί is yes
</span>xéro is know
Answer:
7.402%
Explanation:
Given that the total electrical energy used by the bulb in every second is 66.2 J.
The useful energy converted to light energy is 4.9 J.
As efficiancy (in %) = (Useful energy)/(Total energy) x 100
So, the efficiency of the bulb = (4.9/66.2)x100=7.402%
Hence, the efficiency of the bulb is 7.402%.
<span>Radio Waves, Microwaves, infra-Red, Visible spectrum, Ultraviolet radiation, x-rays, Gamma Rays. Then again I could be wrong.</span>