Explanation:
Ohms law states that the electrical current present in a metallic conductor is directly proportional to the potential difference between the metallic conductor and inversely proportional to the resistance therefore if the voltage is increased resistance also increases provided that temperature and other physical properties remains constant V=IR
No work was done. Work is calculated by force/distance. If there isn't a distance change, no work has technically been done. I'm pretty sure that's right, at least! Hope it helps.
Answer:
Explanation:
This problem can be solved with the conservation of the momentum.
If the ball is fired upward, the momentum before and after the ball is fired must conserve. Hence, the speed of the ball is the same that the speed of the car just in the moment in wich the ball is fired.
Hence, the result depends of the acceleration of the car. If the change in the speed is higher than the speed of the ball, it is probably that the ball will be behind the car or it will come back to the car.
If the ball is fired forward, and if the change in the speed of the car is not enogh, the ball will be in front of the car.
HOPE THIS HELPS!!
Answer:
![\huge{ \boxed{ \bold{ \sf{77 \: m/s}}}}](https://tex.z-dn.net/?f=%20%20%5Chuge%7B%20%5Cboxed%7B%20%5Cbold%7B%20%5Csf%7B77%20%5C%3A%20m%2Fs%7D%7D%7D%7D)
☯ Question :
- How fast is a wave travelling if it has a wavelength of 7 meters and a frequency of 11 Hz?
☯ ![\underbrace{ \sf{Required \: Answer : }}](https://tex.z-dn.net/?f=%20%5Cunderbrace%7B%20%5Csf%7BRequired%20%5C%3A%20Answer%20%20%3A%20%20%7D%7D)
☥ Given :
- Wavelength ( λ ) = 7 meters
- Frequency ( f ) = 11 Hz
☥ To find :
☄ We know ,
![\boxed{ \sf{v = f \times λ}}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%20%5Csf%7Bv%20%3D%20f%20%5Ctimes%20%CE%BB%7D%7D)
where ,
- v = speed of sound
- f = frequency
- λ = wavelength
Now, substitute the values and solve for v.
➺ ![\sf{v = 11 \times 7}](https://tex.z-dn.net/?f=%20%5Csf%7Bv%20%3D%2011%20%5Ctimes%207%7D)
➺ ![\boxed{ \sf{v = 77 \: m/s}}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%20%5Csf%7Bv%20%3D%2077%20%5C%3A%20m%2Fs%7D%7D)
-------------------------------------------------------------------
✑ Additional Info :
- Frequency : The number of complete vibrations made by a particle of a body in one second is called it's frequency. It is denoted by the letter f . The SI unit of frequency is hertz ( Hz ).
- Wavelength : The distance between two consecutive compressions or rarefactions of a sound wave is called wavelength of that wave. It is denoted by λ ( lambda ) and it's SI unit is m.
- Speed of a sound wave : The distance covered by a sound wave in one second is called speed of sound wave. It depends on the product of wavelength and frequency of the wave.
Hope I helped!
Have a wonderful time! ツ
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁