When analyzing inelastic collisions, we need to consider the law of conservation of momentum, which states that the total momentum, p, of the closed system is a constant. In the case of inelastic collisions, the momentum of the combined mass after the collision is equal to the sum of the momentum of each of the initial masses.
p1+p2+...=pf
In our case we only have two masses, which makes our problem fairly simple. Lets plug in the formula for momentum; p=mv.
m1v1+m2v2=(m1+m2)vf
To find the velocity of the combined mass we simply rearrange the terms.
vf=m1v1+m2v2m1+m2
Plug in the values given in the problem.
vf=(3.0kg)(1.4m/s)+(2.0kg)(0m/s)03.0kg+2.0kg
vf=.84m/s
The visible light has wavelength in therange 400 - 700 nano-meters. The wavelengths longer than visible light are: 1-Infrared waves (used in ringtone/mobile waves)2-microwaves -used to heat and cook food. 3- Radiowaves - used in communication
An atom consists of the nucleus (a combination of the proton and neutron) and the electron which orbits the nucleus.
Answer: 20 m³
Explanation:
1) Data:
Tanker:
Vt = 2.5 × 10³ m³
Dt = 8 × 10³ kg / m³
Sea water:
Vs = ?
Ds = 1 × 10³ kg / m³
2) Physical principles and formulas
Buoyancy: weight of the object equals the weight of the water displaced (or pushed away) by the object.
Weight of water = Weight of tanker
weight = mass × g ..... g = acceleration due to gravity ≈ constant
density = mass / volume ⇒ mass = density × volume
3) Solution
Weight of water = Weight of tanker
Ds × Vs × g = Dt × Vt × g
1×10³ kg/m³ × Vs × g = 2.5 × 10³ m³ × 8 × 10³ kg / m³ × g
⇒ Vs = 20 × 10⁶ kg / ( 1 × 10³ kg/m³) = 20 m³
Answer: 20 m³