1. How much heat is required to raise the temperature of 57.8kg of silver from 17.0°C to
1 answer:
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Answer:
The velocity of the truck after this elastic collision is 15.7 m/s
Explanation:
It is given that,
Mass of the car,
Mass of the truck,
Initial velocity of the car,
Initial velocity of the truck, u₂ = 0
After the collision the velocity of the car is, v₁ = -11 m/s
Let v₂ is the velocity of the truck after this elastic collision. Using the conservation of momentum as :
So, the velocity of the truck after this elastic collision is 15.7 m/s. Hence, the correct option is (c).
Answer:
Answer labeled B : 2,304,000 N
Explanation:
Recall the formula for the electric force:
which agrees with answer B provided.
Answer:
Diffusion time is 7.42 h
Solution:
As per the question:
Temperature, T =
Surface concentration of arsenic,
Surface concentration below Silicon surface,
D =
x =
Initial concentration at t = 0,
Now, by using Flick's second eqn:
Thus by putting appropriate values:
(1)
Now,
Now, from error function values tabulation:
For z = 2.0, erf(z) = 0.998
For z = 2.2, erf(z) = 0.995
Now,
With the help of linear interpolation method:
z = 2.12
Now, using eqn (1) and above value:
= 26700 s
t =