Answer:
anions
Explanation:
The other are families of the periodic table.
An anion is a negatively charged ion.
Answer:
Explanation:
Given that,
The elevator slow to stop, this shows that it is decelerating and the final velocity is 0
v = 0m/s
Constant deceleration
a = -1m/s²
It is negative because it is deceleration
The distance the elevator descend is 4.5m
S=4.5m
Then, we want to find the time the elevator spent before stopping
Using the equation of motion
v = u + at
v² = u² + 2as
Where
v is final velocity
u Is initial velocity
a is the deceleration
s- is distance traveled
From here we can find the initial velocity of the elevator
v² = u² + 2as
0² = u² - 2 × 1 × 4.5
0 = u² - 9
u² = 9
u = √9
u = 3m/s
The initial speed is 3m/s
Then, to find the time taken, we can use the first equation
v = u + at
0 = 3 - 1 × t
0 = 3 - t
t = 3 seconds
The time taken before the elevator stop is 3 secs
<h2>
Angular acceleration is 80 rad/s²
</h2><h2>
Number of revolutions undergone is 1.02</h2>
Explanation:
We have equation of motion v = u + at
Initial angular velocity, u = 0 rad/s
Final angular velocity, v = 32 rad/s
Time, t = 0.40 s
Substituting
v = u + at
32 = 0 + a x 0.40
a = 80 rad/s²
Angular acceleration is 80 rad/s²
We have equation of motion s = ut + 0.5 at²
Initial angular velocity, u = 0 rad/s
Angular acceleration, a = 80 rad/s²
Time, t = 0.4 s
Substituting
s = ut + 0.5 at²
s = 0 x 0.4 + 0.5 x 80 x 0.4²
s = 6.4 rad
Angular displacement = 6.4 rad
Number of revolutions undergone is 1.02
Answer: acceleration = slope graph velocity vs time
Explanation: if you have the graph of velocity vs time , the slope of that graph equals the acceleration of our object assuming constant acceleration...but remenber por a real object is really hard to keep constant acceleration
Answer:
0.0360531138247 V/m
Explanation:
= Resistivity of gold = (General value)
I = Current = 940 mA
d = Diameter = 0.9 mm
A = Area =
E = Electric field
Resistivity is given by
The electric field in the wire is 0.0360531138247 V/m