Answer:
The first egg is thrown at a wall and breaks because it has no time to decelerate and it breaks.
While, when a second egg is thrown at wall with same velocity and collides with a bed sheet, it does not break because it get more time to decelerate or collide with the wall. It reduces the amount of force exerted on the egg and it does not break.
Answer:
0.0196 Joules
Explanation:
Kinetic energy is half the product of mass and velocity squared.
K.E=0.5 m*v^2; The m is the mass in kilograms and v is the velocity in meters per second.
We will convert grams to kilograms:
2.45 grams = 0.00245 kilograms.
Calculating kinetic energy:
mass:0.00245 kg
velocity:4 m/s
K.E = 0.5 *0.00245*4^2 = 0.0196 Joules.
Answer:
final equilibrium temperature is 65.02 ◦C
Explanation:
Given data
milk = 12 g
temp milk = 7◦C
coffee = 175 g
coffee temp = 69◦C
to find out
final equilibrium temperature
solution
we apply here equilibrium condition i.e m c ΔT
milk mass × c × ΔT = coffee mass × c × ΔT
12 × 1 × (T- 7) = 175 × 1 × ( 69- T)
12T - 84 = 12075 - 175 T
187 T = 12159
T = 65.02
so final equilibrium temperature is 65.02 ◦C
Answer:
A. a material burns out when current is excessive
