Answer:
0.196 m
Explanation:
Given in the question that,
time taken by the dolphin to go back to water = 0.2 sec
To solve the question we will use Newton's Law of motion
<h3>S = ut + 0.5(a)t²</h3>
here S is distance covered
u is initial speed
a = acceleration due to gravity
t = time taken
Plug value in the equation above
S = 0(0.2) + 0.5(-9.8)(0.2)²
S = 0.5(-9.8)(0.2)²
S = -0.196 m
Negative sign represent direction
(Assuming that dolphin have a vertical straight jump not a projectile motion)
We would lose tides. We'd still have some from the moon but it'd be a few week thing instead of everyday.
Answer:
E = - 11.4 N/C, Directed Downward
Explanation:
Force = 2.00×10⁻⁵N , charge Q = –1.75μC = -1.75 ×10⁻⁶ C
To Find: Electric Field E = ? and Direction=?
Sol
we Have
E = F / Q
E = 2.00×10⁻⁵N / -1.75 ×10⁻⁶ C
E = - 11.428 N/C (-ve sign shows that it is Negative Electric Field around a negative charge and will attract the Positive Field)
As given an upward force on negative charge so direction of the Electric Filed will be Downward (as Electric field is opposite to direction of force on negative charge)
The formula for calculating acceleration can be derived
from:
v^2 = v0^2 + 2 a d
where a is acceleration, v is final velocity, v0 is
initial velocity and d is distance = 0.5 km
Rewriting in terms of a:
a = (v^2 – v0^2) / 2 d
a = (110^2 – 80^2) / (2 * 0.5)
<span>a = 5,700 km/h^2 = 0.44 m/s^2</span>
