Answer:
SI units are the physical units of measurement. SI units include kilogram, meter, second, ampere, kelvin, candela, and mole etcetera.
<u>SI units are very important for daily life while measuring daily life commodities, such as:</u>
- Use of kilograms and grams while buying or selling sugar or other food items.
- Use of kilometers and meters while covering distances.
- Use of meters or inch by carpenters while estimating the lengths for furniture.
- Use of hours, seconds and minutes to measure time duration.
- Use of ampere and volt to measure current and voltage respectively by electricians.
Without SI units, it would be difficult to meausre the amount of object required or any other measurement object.
It is possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball, because the 0.145 kg baseball is of a smaller mass than the 7 kg bowling ball and it also offers less resistance to motion and hence it would go further than the 7 kg bowling ball.
Answer:
C. Protons have an electrical charge, but neutrons have no charge.
Explanation:
Protons and neutrons both are parts of nucleus and they stay inside the nucleus due to large nuclear force between them
Mass of proton and mass of neutron is almost same or in more precisely we can say that neutrons are slightly heavy than protons
mass of neutrons is 1.008 amu while mass of protons are 1.007 amu.
the main different between them is that protons are positively charged and their charge is same as that of charge of electron
while neutrons are electrically neutral and they do not have any charge on them.
so correct answer will be
C. Protons have an electrical charge, but neutrons have no charge.
Answer:
8.5 kg
Explanation:
Angular momentum is conserved.
I₁ ω₁ = I₂ ω₂
I ω₀ = (I + mr²) ω
(49 kg m²) (40 rpm) = (49 kg m² + m (1.2 m)²) (32 rpm)
61.25 kg m² = 49 kg m² + (1.44 m²) m
m = 8.5 kg
The mass of the clay is 8.5 kg.