Force = mass x acceleration
Force = 4kg x 10m/s^2
Force = 40N
Explanation:
Given that,
Initial speed of a car, u = 12 m/s
Aceleration, a = -1.6 m/s²
(a) The displacement of car after 6 seconds is :
(b) The displacement of the car after 9 seconds is :
Hence, this is the required solution.
Answer:
They will never meet.
Explanation:
Given that three sharks are located at the vertices of an equilateral triangle whose side equals LL. They all start moving simultaneously with a constant speed vv, with the first shark heading constantly toward the second, the second toward the third, and the third toward the first. How soon will the sharks converge at one point ?
Since the three sharks are located at the vertices of an equilateral triangle whose side equals, and the first shark is moving toward the second, the second is moving toward the third, and the third shark is moving toward the first, the movement of the three shark will form a circular motion.
Since the three sharks are moving at a constant speed, the three sharks will never meet because the distances between them are also the same.
The three sharks will therefore continue to move till infinity.
Answer:
The recoil speed is 
Solution:
Wavelength of a blue-green photon, 
Now, the energy associated with the blue-green photon:
where
h = Planck's constant
C = speed of light ion vacuum
Also, we know that the recoil speed can be calculated by the KInetic energy which is equal to the Energy of the blue-green photon:
where
= velocity of Hydrogen atom
= mass of H-atom
Now,
Answer: it means object initially possessed equal number of positive and negative charges.
Explanation:
Object looks uncharged when it's in neutral state. That's positive charge equals negative charge.
The moment the transfer of charges take place, one gains electron while the other loses electron.
The gainer of electron becomes negatively charged while the looser of electron becomes positively charged.
