Answer:
Explanation:
In the first case, the mass is at equilibrium. Therefore, the net force on the mass is equal to zero.
In the second case, the spring is compressed by an amount of D, which is equal to an elastic potential energy of
At this height, the gravitational potential energy of the mass is equal to
Then, the total potential energy at height D is
<span>a = (v2 - v1)/t= acceleration formula
a = (70 - 0)/7
a = 10 km/hr/sec
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It's better to use as few units as possible.
10 km/hr = 10 km*1000 m/km/(1 hr*3600 sec/hr) = 25/9 m/sec
a= 25/9 m/sec/se</span>
Answer:
grid or metal sheets or metal foams
Explanation:
Electric and magnetic fields are generated in electrical circuits that often cause interference in the measurements made.
To avoid these interferences, shields are generally used for the electric fields, Farday boxes are used, which are metal grids connected to earth.
For the magnetic field there is also a grid or metal sheets or metal foams,
It should be noted that the gaps in the screening must be smaller than the wavelength of the radiation to be screened.
<span>The last statement does not represent one of Koch's postulate, that is, the postulate did not include determination of how long it takes for the healthy animal to become ill. Koch's postulate established four criteria for determining the causative organism for a particular disease. The criteria are: the causative organism must be present in all cases of the disease, the causative organism must be isolated from the diseased host and grown in pure culture, the causative organism from the pure culture must cause the disease when inoculated into a health susceptible animal and the causative organism must be re-isolated from the new host and proof to be the same as the original causative organism inoculated into the health animal.</span>