Momentum is the quantity of motion contained in an object. Usually it is measured by the product of mass and velocity.
Momentum of first mass = 2 kg × 2 m/sec = 4 kg m/sec
Momentum of second mass = 4 kg × 3 m/sec = 12 kg m/sec
So the machine requires higher mass in motion for second object ( i.e. momentum) than the first one while lifting.

7 0

3 years ago

As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed in

Semenov [28]

Answer:

$A_2 = 2.5\ cm^2$

Explanation:

given,

velocity factor = 4

Cross-sectional area of venules(A₁) = 10 cm²

cross sectional area of capillaries(A_2) = ?

continuity equation = Q = AV

now,

$\dfrac{A_1}{A_2} = \dfrac{V_2}{V_1}$

$\dfrac{10}{A_2} =4$

$\dfrac{10}{4} =A_2$

$A_2 = 2.5\ cm^2$

hence, the area of capillaries is equal to 2.5 cm₂

4 0

3 years ago

Question 17 options:A 71.8 kg man goes from an area where the acceleration due to gravity is 9.79 m/s2 to an area where the acce

DerKrebs [107]

Mass doesn't change, no matter where you take it.
Your first impression of ' 0 ' is totally correct.

4 0

3 years ago

What are 5 hazards of static electricity?

Lana71 [14]

Answer:

It is dangerous when there are flammable gases or a high concentration of oxygen. A spark could ignite the gases and cause an explosion. It is dangerous when you touch something with a large electric charge on it. The charge will flow through your body causing an electric shock.

7 0

3 years ago

Ag,Au and Cu are called coinage metals why plzzzz hurry its urgent plzzz​

Ag,Au and Cu are called coinage metals why plzzzz hurry its urgent plzzz