Answer:
30) B; To analyze this question, recall the equation for Doppler, Δf/f = v/c. This demonstrates that the change in frequency is directly proportional to the relative velocity. If the acceleration is constant, the velocity is changing at a constant rate, so anything directly proportional to that must be changing at a constant rate. Because no squares or roots are involved, it must be linear, not exponential, making B the best answer.
Explanation:
Answer:
Explanation:
Given that
Bulk modulus ,K = 7.1 x 10¹⁰ Pa
The pressure P₁ = 0.781 x 10⁵ Pa
The final pressure P ₂ = 0 Pa
We know that bulk modulus given as
Now by putting the values
Therefore fractional change will be 11 x 10⁻⁷.
As we know that capacitance of parallel plate capacitor is given as
here we know that the gap between the plates of capacitor is filled by air or vacuum
now if we fill the space between the plates by dielectric medium then we will have
so it will increase the capacitance of capacitor
Also we can see that capacitance is inversely depends on the distance between the plates of capacitor plates
So capacitance will increase if we decrease the distance between two plates
so correct answers are
D) introduce a dielectric material between the plates
E) decrease the separation between the plates
Answer:
Number :
Number is actually represents quantity.
Symbol :
Symbol is actually a character that shows the number.
Explanation:
Answer:
they meet at distance 25 feet
Explanation:
given data
acceleration of car = 8 ft/s²
truck speed = 10 ft/s
car initial speed u = 0
truck acceleration = 0
to find out
How far from the starting point will car overtake the truck
solution
we apply here equation of motion
s = ut + 0.5 ×a×t² .............1
here s is distance and a is acceleration and t is time u is initial speed
so truck distance
s = 10t + 0.5 ×0×t²
s = 10 t ...............2
and car distance
s = 0+ 0.5 ×8×t²
s = 4×t² ..........................3
so from equation 2 and 3
10 t = 4×t²
t = 2.5 s
so both meet at distance
s = 10 (t)
s = 10 ( 2.5 ) = 25 ft
so they meet at distance 25 feet