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4 years ago

When do tornadoes form?

1 answer:

6 0

D. when warm air that is near the bottom of a supercell moves in the opposite direction of cold air that is higher up
Hope this makes it a little bit clearer for you today:)

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A bullet of mass 0.017 kg traveling horizontally at a high speed of 290 m/s embeds itself in a block of mass 5 kg that is sittin

rodikova [14]

Answer:

(a) vf = 0.98 m/s

(b) K₁ = 714.85 J : Total translational kinetic energy before the collision.

K₂= 2.41 J : Total translational kinetic energy after the collision.

Explanation:

Theory of collisions

Linear momentum is a vector magnitude (same direction of the velocity) and its magnitude is calculated like this:

p=m*v

where

p:Linear momentum

m: mass

v:velocity

There are 3 cases of collisions : elastic, inelastic and plastic.

For the three cases the total linear momentum quantity is conserved:

P₀ = Pf Formula (1)

P₀ :Initial linear momentum quantity

Pf : Final linear momentum quantity

Data

m₁ = 0.017 kg : mass of the bullet

m₂ = 5 kg : mass of the block

v₀₁ = 290 m/s : initial velocity of the bullet

v₀₂ = 0 : initial velocity of the block₂

(a) Speed of the block after the bullet embeds itself in the block

We appy the formula (1):

P₀ = Pf

m₁*v₀₁ + m₂*v₀₂ = (m₁+ m₂)vf

vf: final velocity of the block

( 0.017)*( 290) + (5)*(0) = ( 0.017 + 5 )*vf

4.93+ 0 = ( 5.017 )*vf

vf = 4.93 / 5.017

vf = 0.98 m/s

b) Total translational kinetic energy before (K₁) and after the collision(K₂).

K₁ = 1/2(m₁*v₀₁² + m₂*v₀₂²)

K₁ = 1/2(0.017*(290)² + 5*(0)²) = 714.85 J

K₂= 1/2(m₁+ m₂)*vf²

K₂= 1/2(0.017+ 5)*(0.98)² = 2.41 J

6 0

3 years ago

In the apple-pulling-the orange sequence in this chapter, what is the force that accelerates the system across the floor?.

Montano1993 [528]

In the apple-pulling-the orange sequence in this chapter, the force that accelerates the system across the floor is;

Friction between the apple and the floor.

<h3>Frictional Force</h3>

The sequence talked about here is a system showing how an apple was pulling an orange that was located inside a moving toy.

Now, we know that there is usually a force that acts between a moving object and the floor and this force is called friction force.

Thus, the force that makes the apple to pull the orange with acceleration across the floor is called friction force between the apple and the floor.

Read more about Frictional Force at;brainly.com/question/13680415

8 0

2 years ago

A geothermal plant uses geothermal water (yes a liquid) extracted from beneath the Earth using drilling apparatus. The geotherma

leva [86]

To solve this problem it is necessary to apply the concepts of heat change and thermal efficiency.

The heat rate can be expressed under the function

$Q = \dot{m} (h_1-h_2)$