The total kinetic energy of the system after collision is 223.5J
In elastic collision kinetic energy and momentum are conserved.
According to the question
mass of object a = 25kg
mass of object b = 25 kg
initial velocity of a u1 = 5.98 m/s
initial velocity of b u2 = 0
so from momentum conservation-
mau1 + mbu2 = (m1+m2)v
25kg × 5.98m/s + 25×0 = (25+25)v
v = 2.99 m/s
Now the total kinetic energy after the collision will be:
final kinetic energy = 1/2 (m1+m2) v²
= 1/2 (25+25)× (2.99)²
= 223.5 J
Thus, total kinetic energy of the system after collision is 223.5J
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Answer:
Explanation:
We are given that
Final velocity, v=199 km/h=
1km/h=
Initial velocity, u=0
S=2000 m
We know that
Using the formula
Hence, the minimum acceleration necessary for the plane to take flight=
Answer:
D . 1.47 x 10⁻² Ω-m
Explanation:
L = length of the cylindrical resistor = 2 m
d = diameter = 0.1 m
A = Area of cross-section of the resistor = (0.25) d² = (0.25) (3.14) (0.1)² = 0.785 x 10⁻² m²
V = battery Voltage = 12 volts
= current flowing through the resistor = 3.2 A
R = resistance of the resistor
Resistance of the resistor is given as
R = 3.75 Ω
= resistivity
Resistance is also given as
= 1.47 x 10⁻² Ω-m
Hello again!
The energy levels of an atom can be classified as follows:
First level-2 electrons
Second level-8 electrons
Third level-18 electrons
Fourth level-32 electrons
If an atom has 3 electrons, 2 of them will be in the 1st energy level making the 3rd one be on the 2nd energy level. Good luck with your homework!
The container that contains a greater volume of water will contain a greater mass of water.
The volume of the cube is given by:
V = s³
V = volume, s = side length
Given values:
s = 3m
Plug in and solve for V:
V = 3³
<em>V = 27m³</em>
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The volume of the sphere is given by:
V = 4πr³/3
V = volume, r = radius
Given values:
r = 3m
Plug in and solve for V:
V = 4π3³/3
<em>V = 113m³</em>
<em />
The sphere contains more mass.