Answer:
Final speed of security car v = 65 m/s
Explanation:
Given:
Speed of race car u1 = 35m/s
Speed of security car u2 = 5 m/s
Acceleration = 5 m/s²
Find:
Final speed of security car v
Computation:
Assume, they chase S meter
So
S = u1t + [1/2]at²
S = 35t
S = u2t + [1/2]at²
so,
35t = 5t + [1/2](5)t²
t = 12 s
So
v = u + at
v = 5 + 5(12)
Final speed of security car v = 65 m/s
<u>Answer:</u>
"They stay in place and vibrate" is true about the particles of iron.
<u>Explanation:</u>
The iron in solid state have tiny particles like atoms, molecules and ions which stay in their position and can only vibrate slightly as their arrangement is compact in nature which do not allow them to move all over the place due to strong force of attraction called as "inter-molecular attraction".
While iron in molten form, being semi-solid have more spaces between the particles, therefore they vibrate more than the particles in compact situation of solid state. And definitely the inter-molecular force of attraction is also weaker than in between actual solid iron particles.
Answer:
red light is absorbed and reflected off most plants
Explanation:
Answer:
Weight of the dog on surface of earth is 140.14 Newton.
Given:
mass of the dog = 14.3 kg
To find:
Weight of the dog = ?
Formula used:
Weight of the dog is given by,
W = mg
Where, W = weight of the dog
m = mass of the dog
g = acceleration due to gravity
Solution:
Weight of the dog is given by,
W = mg
Where, W = weight of the dog
m = mass of the dog = 14.3 kg
g = acceleration due to gravity
W = 14.3 × 9.8
W = 140.14 Newton
Weight of the dog on surface of earth is 140.14 Newton.