3 years ago

Seasons are a result of:

Physics

1 answer:

Ber [7]3 years ago

7 0

Earths tilt on the axis.

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A cart of mass 6.0 kg moves with a speed of 3.0 m/s towards a second stationary cart with a mass of 3.0 kg. The carts move on a

IgorLugansk [536]

Answer:1.5

Explanation:

Given

mass of first cart $m_1=6 kg$

initial Velocity $u_1=3 m/s$

mass of second cart $m_2=3 kg$

$u_2=0 m/s$

In the absence of External Force we can conserve momentum

$m_1u_1+m_2u_2=(m_1+m_2)v$

$v=\frac{m_1u_1+m_2u_2}{m_1+m_2}$

$v=\frac{6\times 3+3\times 0}{6+3}$

$v=2 m/s$

Final kinetic Energy of two masses

$K.E._2=\frac{1}{2}(m_1+m_2)v^2$

$K.E._2=\frac{1}{2}\cdot (3+6)\cdot (2)^2$

$K.E._2=18 J$

Initial Kinetic Energy

$K.E._1=\frac{1}{2}m_1u_1^2+\frac{1}{2}m_2u_2^2$

$K.E._1=\frac{1}{2}6\times 3^2+0$

$K.E._1=27 J$

$ratio =\frac{K.E._1}{K.E._2}=\frac{27}{18}=1.5$

5 0

4 years ago

if you apply a net force of 5 N on a cart with a mass of 5 kg, show that the acceleration is one meter per second squared

lina2011 [118]

$*\\
From\ Newton's\ third\ Law:\\\\
acceleration=\frac{Net\ force}{mass}\\\\
Net\ force=5N\\
mass=5kg\\\\
acceleration=\frac{5N}{5kg}=1\frac{m}{s^2}$

3 0

3 years ago

the weight of a piece of stone when fully immersed in water is 18N and it displaces 4N of water. what is the weight of the stone

goldfiish [28.3K]

Answer:

Explanation:

Given parameters:

Weight of stone when immersed in water = 18N

Weight of water displaced = 4N

Unknown:

Weight of the stone in air = ?

Solution:

To solve this problem, we employ the Archimedes' principles.

It states that the upward buoyant force on a body is equal to the weight of the fluid displaced.

The weight of the water displaced is equal to the weight of the body.

So, the weight of the stone in air = 4N

4 0

3 years ago

What would it mean if neither the red or blue litmus paper changes colors?

Anna35 [415]

if the color changes, it is neutral but if it stays the same, it is an acid.

8 0

3 years ago

If a substance has a pH of 10 -11, it is considered a ...

Mrac [35]

Answer:

Base

Explanation:

anything with a pH between 0-6 is an acid. pH of 7 means neutral. 8-14 means it is a base

hope I helped :)

8 0

4 years ago