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1. ### What is the speed of an electron with kinetic energy 780 eV? What is the speed of an electron with kinetic energy 0.40 keV?

... = √2E/m = √25*10^-17*10*31/9.11 = 10^7√25/9.11 = 1.66*10^7 m/sec B) E = 400 ev = 0.64*10^-16 joule mass of el. m = 9.11*10^-31 kg speed...

2 Answers · Science & Mathematics · 09/02/2020

2. ### Physics help!?

charge Q = 8.45*10^20 el / (6.24*10^18) el/Co = 135 Co (A*sec) current I = Q/t = 135 A*sec / 3.89 sec = 34.8 A

1 Answers · Science & Mathematics · 09/02/2020

3. ### A tuning fork produced four beats per second with a second, 340-Hz tuning fork. What are two possible frequencies of the first tuning fork?

1) the possible frequencies of the 1st fork are 344Hz and 336Hz 2) no. of loud noises(waxings) is 4 / sec 3) beat frequency is also 4

2 Answers · Science & Mathematics · 06/02/2020

4. ### Would it be progressive for a king to give an alligator political power?

it would be so woke to let a dysfunctional child pick your Sec of ED...

3 Answers · Politics & Government · 07/02/2020

5. ### 2 easy physics questions!!!?

...acceleration of m2 ? acceleration a : a = g*m2/(m1+m2) = g*6.50/(6.50+2.75) = 0.703*g m/sec^2 (≅ 6.89) down and equal in magnitude for both masses 2. Consider...

3 Answers · Science & Mathematics · 07/02/2020

6. ### Physics Waves ?

... is the period and frequency? period T = t/n = 10/100 = 0.1 sec per wing frequency f = 1/T = 1/0.1 = 10 wings per second ...

3 Answers · Science & Mathematics · 05/02/2020

7. ### A grunting porpoise emits a sound of 56 Hz sound. What is the wavelength of this sound in water, where the speed of sound is 1500 m/s?

Given, Frequency (f) = 56Hz Speed of sound (c) = 1500m/sec Wavelength (λ) =? We know that:- Wavelength (λ) = c/f = 1500m/sec / 56Hz = 26.78m ≈ 26.8m ∴ Wavelength (λ) = 26.8m.

2 Answers · Science & Mathematics · 05/02/2020

8. ### When a particular wire is vibrating with a frequency of 4 Hz, a transverse wave of wavelength 82 cm is produced....?

V = λ*f = 0.82*4 = 3.28 m/sec

2 Answers · Science & Mathematics · 05/02/2020

9. ### Why do I feel so sad and angry?

...rate of 5 breaths a minute. Breathe gently through your nose, 6 sec inhale and 6 sec exhale. Info about depression and other mental health problems...

2 Answers · Health · 09/02/2020

10. ### What workoutplan should i do?

...the treadmill on an incline (if it can) and do sprints. Start with 20 sec sprint, 40 sec walk and repeat 6 times. Over the weeks, build...

2 Answers · Health · 04/02/2020