Answer:
so height is 0.1283 m
Explanation:
given data
height = 28 cm
diameter = 11 cm
cross-sectional area = 1.55 cm2
water flow rate = 2.46×10^−4 m3/s
to find out
How high will the water in the bucket rise
solution
we know that here
potential energy = kinetic energy
mgh = 1/2 mv²
multiply both sides by the 2 and we get
2mgh=mv²
solve it we get
√(2gh) = v ....................1
h = v²/2g ...............2
and
flow rate = A V
2.46×10^−4 = V 1.55×10^−4
V = 1.5870 m/s
so from 2
h = v²/2g
h = 1.5870²/ 2(9.81)
h = 0.1283 m
so height is 0.1283 m
The answer will be maximum.
Answer:
Here to make the two systems oscillate with same period either decrease the mass of the block system to one fourth or increase the length of the string to four times
Explanation:
we know that time period of block spring system is
where m = mass of the block
k= spring constant
and also time period of simple pendulum making small oscillations is
where l = length of the pendulum
g = acceleration due to gravity
so here to make time period of the both systems to be same either we can decrease the block system time period to its half or double the time period of the pendulum.
To decrease the time period of block spring system to half its value from above equation we need to decrease the mass of the block to one fourth
and to increase the time period of the pendulum we need to increase length by four times .
B or c hopefully it helps
Bruh just multiply 9.5 by 140 because if he runs for 140 seconds and runs 9.5 meters per second then he runs 9 meters per second