density = mass/volume
50 kg to g
50*1000 = 50,000 grams
200 mm to cm
200*0.1 = 20 cm
Substitute: 0.8=50,000/volume of a cylinder
volume of cylinder= (pi)(r^2)(h)
volume of cylinder=(pi)(20^2)(h)
0.8=50,000/((pi)(20^2)(h))
0.8=50,000/400*pi*h
50,000/0.8=400*pi*h
62,500=400*pi*h
62,500/(400*pi)=h
h≈49.74 cm
We have: A= F.s
So, A = 22 x 16
A= 352J
Só A is correct answer
Answer:
It gives you the symbol, mass, and the number of protons, neutrons, and electrons of elements.
Answer:
11.25m
Explanation:
Given parameters:
Initial velocity = 0m/s
Time of running = 3s
Acceleration = 2.5m/s²
Unknown:
Displacement = ?
Solution:
To solve this problem, we apply one of the motion equations.
S = ut + at²
u is the initial velocity
t is the time taken
a is the acceleration
S = (0 x 3) + ( x 2.5 x 3²) = 11.25m
Answer:
1.4 m/s
Explanation:
From the question given above, we obtained the following data:
Initial Displacement (d1) = 0.9 m
Final Displacement (d2) = 1.6 m
Initial time (t1) = 1.5 secs
Final time (t2) = 2 secs
Velocity (v) =..?
The velocity of an object can be defined as the rate of change of the displacement of the object with time. Mathematically, it can be expressed as follow:
Velocity = change of displacement /time
v = Δd / Δt
Thus, with the above formula, we can obtain the velocity of the car as follow:
Initial Displacement (d1) = 0.9 m
Final Displacement (d2) = 1.6 m
Change in displacement (Δd) = d2 – d1 = 1.6 – 0.9
= 0.7 m
Initial time (t1) = 1.5 secs
Final time (t2) = 2 secs
Change in time (Δt) = t2 – t1
= 2 – 1.5
= 0.5 s
Velocity (v) =..?
v = Δd / Δt
v = 0.7/0.5
v = 1.4 m/s
Therefore, the velocity of the car is 1.4 m/s