An 'alpha particle' is the same thing as the nucleus of a helium atom ...
a little bundle made of 2 protons and 2 neutrons.
A 'beta' particle is an electron.
The mass of an alpha particle is more than 7,000 times the mass of
an electron, so it certainly takes more energy to get it moving.
Answer:
The work done to lift the counterweight equals the potential energy acquired
Explanation:
since this is vertically applied force on the counterweight, and the distance the force is displacing the counterweight is in the same direction as the applied force, it equals the gained potential energy
The correct answer to this problem would be that like poles repel and unlike poles attract.
N and N poles repel
S and S poles repel
N and S poles attract
S and N poles attract
Answer: D) like poles repel each other. unlike poles attract each other
I hope this helps!
We know that d=m/v where d is density, m is mass and v is volume. Lets transform formula to get v in times of d and m
Now we have to substitute our data to formula
V=
ml - its the answeer
Answer:
A. 70 Ns
B. 70 Kgm/s
C. 2.19 m/s
Explanation:
A. Determination of the impulse.
Force (F) = 20 N
Time (t) = 3.5 s
Impulse (I) =?
Impulse (I) = force (F) × time (t)
I = Ft
I = 20 × 3.5
I = 70 Ns
Thus, the Impulse is 70 Ns.
B. Determination of the change in momentum
Force (F) = 20 N
Time (t) = 3.5 s
Change in momentum =?
Change in momentum = m(v – u) = Ft
Change in momentum = Ft
Change in momentum = 20 × 3.5
Change in momentum = 70 Kgm/s
C. Determination of the final velocity.
Change in momentum = 70 Kgm/s
Initial velocity (u) = 0 m/s
Combined mass (m) = 32 kg
Final velocity (v) =?
Change in momentum = m(v – u)
70 = 32(v – 0)
70 = 32(v)
70 = 32v
Divide both side by 32
v = 70 / 32
v = 2.19 m/s
Thus, the final velocity is 2.19 m/s
