J(r) = Br. We know that the area of a small segment, dA, is represented as 2 π dr. Thus, I = J A and dI = J dA. Plugging in the values gives us dI = B r. 2 π dr which simplifies to dI= 2π Br² dr. Now, integrating the above equation: Given that B= 2.35 x 10⁵ A/m³, with r₁ = 2 mm and r₂ equal to 2 + 0.0115 mm, or 2.0115 mm.
Response:
Clarification:
Impulse is equal to change in momentum
mv - mu, where v and u represent the final and initial velocities during the surface impact
For the downward motion of the baseball
v² = u² + 2gh₁
= 2 x 9.8 x 2.25
v = 6.64 m / s
This becomes the initial velocity upon impact.
For the upward movement
v² = u² - 2gh₂
u² = 2 x 9.8 x 1.38
u = 5.2 m / s
This becomes the final velocity post-impact
change in momentum is
m ( final velocity - initial velocity )
.49 ( 5.2 - 6.64 )
=.7056 N.s.
Impulse exerted by the floor in the upward direction is
=.7056 N.s
The distinction lies in the fact that the candle emits an emission spectrum, while the book reflects an absorption spectrum. In the case of the book, light is observed from all directions, causing its reflection to be diffuse. Explanation: The light emitted by a candle originates from the heat of the flame, composed of a combination of emissions from a black body at that temperature along with emissions from the chemical elements within the candle. On the contrary, the light reflected off a book cover consists of the incident light spectrum minus the wavelengths that trigger electronic transitions in the cover's elements, resulting in dark areas on the spectrum. Consequently, the difference stems from the candle producing an emission spectrum, whereas the book showcases an absorption spectrum. For a book's cover to reflect light specularly, incident rays would need to reflect uniformly, creating dark areas. However, since light is observed from all directions when reflecting off a book, the result is diffuse reflection.
Answer:
If the net force acting on an object doubles, its acceleration also doubles. Conversely, if the mass is doubled, the acceleration will be halved. If both the net force and mass are doubled, the acceleration remains the same.
Explanation:
[[TAG_9]][[TAG_10]]
Answer: t = 0.878s
Explanation: A note for you,
since the temperature decreases in a straight line, you can expect the movement speed to also behave linearly. However, this isn't exactly true (referring to the formula). Alternatively, utilize the interpolation principle: (x/v_surface + x/v_top)/2 = t.
While the answer may not match exactly, it should be a close approximation. You can use this formula, thus avoiding large distance calculations.
