The mass of the car at the given kinetic energy is 920 kg.
The given parameters;
- initial velocity of the car, u = 22 m/s
- kinetic energy of the car, K.E = 222,640 J
Kinetic energy if the energy acquired by a body during its motion. This kinetic energy is the product of average velocity squared and mass of the object.
The mass of the car at the given kinetic energy is calculated as follows;
Thus, the mass of the car at the given kinetic energy is 920 kg.
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The molecular geometry of both F2 and HF is linear.There are only two atoms which are covalently bonded and thus, the bonding scheme with the atoms looks like this;
F --- F
H---F
So, both are linear.
Material 1 will be having the largest Young's modulus followed by Material 5, Material 3, Material 2 and Material 4.
Answer:
Option C.
Explanation:
Materials can be classified based on their elastic nature. Elasticity is the property of an object to return to its original state after deformation is removed. So the deformation can be occurred on that object due to the force or stress acting on that object.
As per Hooke's law, the stress acting on any object is directly proportional to the deformation or strain experienced by that object. And the constant of proportionality is termed as Young's modulus.
Young's modulus = Stress/Strain
So from the table, the young's modulus for all the materials are found as below.
Material 1 = Stress/Strain = 775/7.34E-06 = 106 ×
Material 2 = 900/1.86E-02=48400
Material 3 = 1200/2.55E-05 = 471×
Material 4 = 1500/3.95E-03=389×
Material 5 = 2500/2.53E-05=988×
So as per the given calculations, Material 1 will be having the largest Young's modulus followed by Material 5, Material 3, Material 2 and Material 4.