Answer:
![E = 800\,kWh](https://tex.z-dn.net/?f=E%20%3D%20800%5C%2CkWh)
Explanation:
The annual energy used for lighting in the classroom is:
![E = (0.4\,kW)\cdot \left(10\,\frac{h}{day} \right)\cdot \left(200\,\frac{day}{year} \right) \cdot \left(1\,\frac{kWh}{year} \right)](https://tex.z-dn.net/?f=E%20%3D%20%280.4%5C%2CkW%29%5Ccdot%20%5Cleft%2810%5C%2C%5Cfrac%7Bh%7D%7Bday%7D%20%5Cright%29%5Ccdot%20%5Cleft%28200%5C%2C%5Cfrac%7Bday%7D%7Byear%7D%20%5Cright%29%20%5Ccdot%20%5Cleft%281%5C%2C%5Cfrac%7BkWh%7D%7Byear%7D%20%5Cright%29)
![E = 800\,kWh](https://tex.z-dn.net/?f=E%20%3D%20800%5C%2CkWh)
Ear Canal.
Explanation:
Sound waves enter the auricle and travel through a narrow passageway called the ear canal, which leads to the eardrum.
To get it to start moving, he have to exert a force equal to its maximum force of static friction.
F= fs,max = Ms m g= (0.21) * (180) * (9.8) = 370 N
Let me know if im wrong but if not brainliest user for helping or best answer
Answer:
Option D
48 N
Explanation:
From Newton's law of motion we deduce that the magnitude of force is a product of mass and acceleration hence expressed as, F=ma where F is the magnitude of force, m is the mass of the object and a is the acceleration of the cart. Substituting 24 kg for m and 2 for acceleration then
F=24*2= 48 N
Answer:
<em>the mass of the original unstable particle is</em><em> 1115.08 MeV/c²</em>
Explanation:
The momentum of a particle is determined by:
p = e B R
where
- B is the magnetic field
- R is the radius of curvature
- e is the energy of the particle
Therefore,
p = e B R kg · m/s
We can transform the units to MeV/c and we do that by taking:
e = 0.511 MeV and
c = 3 × 10⁸ m/s
Therefore,
p = 300 B R MeV/c
p = 300(0.250 T)(1.33 m) MeV/c
p = 99.75 MeV/c
The energy of the unstable decayed particle is determined as:
E = √ [m²c⁴ + p²c²]
where
- m is the mass of the particle
- c is the speed of light
- p is the particle's momentum
Therefore,
E = E_p + E_(π⁻)
E = √[ (938.3)² + (99.75)² ] + √[ (139.5)² + (99.75)² ]
E = 1115.08 MeV
Since the particle was initially at rest, its energy is only rest-mass energy so its <em>mass will be 1115.08 MeV/c²</em>