Explanation:
Given parameters:
Distance = 180m
Time = 12s
Unknown:
Speed in m/s and km/hr
Solution:
Speed is the distance divided by the time taken,
Speed = 
So;
Speed = 
= 15m/s
1000m = 1km
3600s = 1hr
Therefore;
15 x m x 
x 
x 
= 54km/hr
The flask was later developed using new materials such as glass and aluminum; however, Dewar refused to patent his invention. ... The name later became a genericized trademark after the term "thermos" became the household name for such a vacuum-insulated container for liquids.
Answer:
The ratio is 
Explanation:
Generally the Moment of inertia of a spherical object (shell) is mathematically represented as
Where m is the mass of the spherical object
and r is the radius
Now the the rotational kinetic energy can be mathematically represented as
Where 
is the angular velocity which is mathematically represented as
=> ![w^2 = [\frac{v}{r}] ^2](https://tex.z-dn.net/?f=w%5E2%20%20%3D%20%20%20%5B%5Cfrac%7Bv%7D%7Br%7D%5D%20%5E2)
So
![RE = \frac{1}{2}* [\frac{2}{3} *mr^2] * [\frac{v}{r} ]^2](https://tex.z-dn.net/?f=RE%20%20%3D%20%5Cfrac%7B1%7D%7B2%7D%2A%20%20%5B%5Cfrac%7B2%7D%7B3%7D%20%2Amr%5E2%5D%20%2A%20%20%20%5B%5Cfrac%7Bv%7D%7Br%7D%20%5D%5E2)
Generally the transnational kinetic energy of this motion is mathematically represented as
So
I say Albert Einstein gets reborn
Answer:
60 cm²
Explanation:
Pressure = Force / Surface area
This is a 2 stage problem which requires working out pressure of piston A and then using that pressure from piston A to calculate the surface area of piston B
Firstly work out pressure of Piston A:
Pressure = 200 / 4
Pressure = 50 N/cm²
Then work out the Surface area of piston B :
Since the pressure is transferred the pressure stays the same so :
Surface area = Force / Pressure
Surface area = 3000 / 50
Surface area = 60 cm²
