Answer:
The wolf's kinetic energy is 12000 J.
Explanation:
Kinetic energy is calculated as follows:
Where m stands for mass (in kg) and v for velocity in m/s, thus:
Answer:
Work function,
Explanation:
Given that,
Frequency of light,
Kinetic energy of the ejected electrons,
We need to find the work function of the gold. Let it is W.
Using Einstein's photoelectric equation as follows :
So, the work function of gold is .
There are three things speed, velocity, and momentum.
Answer
given,
mass of block (m₁)= 8 kg
mass of other block (m₂) = 5.75
velocity of first object (v₁) = 5.5 m/s
velocity of second object (v₂) = 6 m/s
a) total momentum before collision = total momentum after collision
m₂v₂ - m₁ v₁ = (m₁ + m₂) V
5.75 x 6 - 8 x 5.5 = (5.75 + 8 ) V
V = - 0.69 m/s
b) negative sign shows the direction motion of object after collision toward left.
c) Initial kinetic energy
K_i = 224.5 J
final kinetic energy
=
=
K_f = 3.23 J
loss in mechanical energy
Δ KE = 3.23 - 224.5
Δ KE = -218.1 J
negative sign shows loss of mechanical energy.
Answer:
No
Explanation:
Because the people put in charge of defining SI units said so