Something that claims to be science but is not is called

A steel ball of mass 50 g is rolled from the left toward a ball of lead of mass 500 g. The steel ball is traveling with a veloci

alina1380 [7]

Answer: It's hard to say without characterizing the collision. But it will be either A if the collision is totally in-elastic, or B if the collision is totally elastic. It could be anywhere in between for partially elastic collisions.

Explanation:

momentum is conserved, so initial system momentum will be left to right.

The velocity of the center of mass is 50(5) / 550 = 0.4545... m/s

In an elastic collision, the lead ball will move off at twice that speed or 0.91 m/s to the right.

The steel ball will bounce back and move away at 0.91 - 5 = -4.1 m/s . The negative sign indicates the steel ball has reversed course and has negative momentum

In a totally in-elastic collision, both balls would move to the right at 0.45 m/s. The steel ball will still have positive momentum.

4 0

3 years ago

The owner of the gas station wants to bury the gasoline so deep that no vacuum pump will be able to extract it. He has hired a g

zloy xaker [14]

Answer:

The depth of tank so that 13.49 m

Explanation:

As pressure is given as

$P=\rho g h$

here

P is the pressure which in order to avoid siphoning by any vacuum pump is atmospheric pressure. i.e. P=1.013 x10^5 Pa
ρ is the density of the gasoline which is calculated from the following equation of specific gravity. Assume the specific gravity of gasoline is 0.766

$\rho=S.G \times \rho_{w}\\\rho=0.766 \times 1000 kg/m^3\\\rho=766 kg/m^3$

h is the depth which is to be calculated here .

$P=\rho g h\\h=\frac{P}{\rho g}\\h=\frac{1.013 \times 10^5}{766 \times 9.8}\\h=13.49 m$

So the depth of tank so that 13.49 m

6 0

4 years ago

3. Differentiate between: (a) area and volume

Margarita [4]

Answer:

area is 2d volume is 3d

Explanation:

Area refers to the size of two-dimensional surface. Volume refers to the size of a three-dimensional space.

8 0

3 years ago

What is the momentum of a 1400 kg car traveling at 25 m/s?

sveticcg [70]

<h2>Hello</h2>

The answer is:

$35000Kg.\frac{m}{s}=35000N$

Momentum is the quantity of movement of an object, and it's calculated using the mass and the velocity of the object. Momentum is expressed by the following formula:

$p=m*v$