One possible formula is
<em>Weight = (mass of the object) x (acceleration of gravity where the object is).</em>
Answer: 19 s
Explanation:
The relationship between speed, distance and time is given by:
velocity= distance/time
time= distance/velocity= 323 m/17 m/s= 19 s
Answer:
Answered
Explanation:
Energy of electron in hydrogen atom is given by
E_n= 
now as becomes large
ΔE= E_n+1 - E_n= 18.6 eV(1/n^2- 1/(n+1)^2)
now, as n increases ΔE_n decreases
in the limit n→∞ , ΔE_n→0. Thus with increase in n, energy level come close to each other.
b) Since, the wavelength of the rays depends upon the energy level hence they too come closer.
c)Near the ionization threshold the energy level of the atoms come closer and the total energy of the electron becomes almost so that it can be easily removed from the orbit.
Answer:
B) 20N.s is the correct answer
Explanation:
The formula for the impulse is given as:
Impulse = change in momentum
Impulse = mass × change in speed
Impulse = m × ΔV
Given:
initial speed = 40m/s
Final speed = -60 m/s (Since the the ball will now move in the opposite direction after hitting the bat, the speed is negative)
mass = 0.20 kg
Thus, we have
Impulse = 0.20 × (40m/s - (-60)m/s)
Impulse = 0.20 × 100 = 20 kg-m/s or 20 N.s