Answer:
2/3
Explanation:
It is important to bear in mind that momentum is generated by the fluid. Momentum is proportional to the mass and velocity, therefore increasing the mass(density) of the liquid by a factor of 2, while the velocity is constant, increases the momentum of fluid (and rocket) by 2. For any closed system, the momentum is conserved. With that in mind, the momentum of the fluid is equal to but opposite in direction to the momentum of the rocket. Velocity of the rocket given by v=p/m (Where p=momentum of the rocket initially and m is its initial mass). The mass of the rocket increases 3 times. So....
Initially:
vi=p/m
Now:
vf=2p/3m
<h3>The ratio is given by:</h3>
vf:vi = 2p/3m:p/m
Answer:
v1 = 377.98 m/s
Explanation:
m = 5 Kg
v0 = 176 m/s
v0x = v0*Cos 32° = 176 m/s*Cos 32° = 149.256 m/s
m1 = 2 Kg
m2 = 3 Kg
t = 4.1 s
g = 9.81 m/s²
Before the explosion
pix = m*v0x = 5 Kg*149.256 m/s = 746.282 Kgm/s
piy = 0
After the explosion
pfx = m1*v1x
knowing that pix = pfx
we have
746.282 = 2*v1x
v1x = 373.14 m/s
v2y = g*t
pfy = m1*v1y + m2*v2y
pfy = 2*v1y + 3*(9.81*4.1)
pfy = 2*v1y + 120.663
knowing that piy = pfy = 0
we have
0 = 2*v1y + 120.663
v1y = 60.33 m/s
Finally we apply
v1 = √(v1x² + v1y²)
v1 = √(373.14² + 60.33²)
v1 = 377.98 m/s
Answer:
The two helicopters have the same kinetic energy, but a different GPE, or gravitational potential energy.
Explanation:
Point object is an expression that is used in Kinematics. It refers the object whose dimensions are ignored or neglected and is treated as a dot object to simplify the calculations. When the object is treated as a point object it means the whole mass is summed in one point, you can imagine it as a sphere which has the mass and the radius is 0...
Answer in my own words:
Research reveals that most of the indoor microplastics contained in the air are created by synthetic plastic fibres, as well as by textiles used in furniture
Key words:
1: Research
2: air
3: Plastic
Please mark brainliest
<em><u>Hope this helps.</u></em>
