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2 years ago

Why is Venus sometimes called Earth’s twin?

Physics

2 answers:

monitta2 years ago

8 0

Answer:

Venus is the same size and density.

Explanation:

It is becuase venus has the same size and density as earth

musickatia [10]2 years ago

3 0

Answer:

Explanation:

Because is twin because they are Same size and that's why they are twons

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If the mass is displaced 0.270 m from equilibrium and released, what is its speed when it is 0.130 m from equilibrium?

puteri [66]

Answer:

The speed is 1.52 m.

Explanation:

Given that,

Displacement =0.270 m

Distance = 0.130 m

Suppose a 0.321-kg mass is attached to a spring with a force constant of 13.3 N/m.

We need to calculate the angular velocity

Using formula of angular velocity

$\omega=\sqrt{\dfrac{k}{m}}$

Put the value into the formula

$\omega=\sqrt{\dfrac{13.3}{0.321}}$

$\omega=6.43\ rad/s$

We need to calculate the velocity

Using formula of velocity

$v=\omega\sqrt{A^2-x^2}$

Put the value into the formula

$v=6.43\times\sqrt{0.270^2-0.130^2}$

$v=1.52\ m/s$

Hence, The speed is 1.52 m.

6 0

2 years ago

A temperature of a 50 kg block increases by 15°C when 337,500 J thermal energy are added to the block. what is the block made of

DENIUS [597]

Answer:

Iron

Explanation:

H = mc∅

Above equation can be used here to find the answer to the question. this equation gives us the relationship between the heat energy supplied to a material and the temperature difference that the material would go through according to its mass.

here H is the Heat energy supplied to the material. m is the mass of the material. c is the specific heat capacity of the material and ∅ is the temperature difference applied to the material. we are given that H= 337,500J , m = 50 kg and ∅ = 15 °C. so from the equation now we can calculate the value of c. after calculating c we can find the material because c is an unique value for a particular material. no two materials have the same c value.

c = 337500/(50*15)

c = 450 J/(kg°C) - Iron (google the heat capacity value to find the answer Iron)

8 0

3 years ago

Part A

jasenka [17]

Answer:

answer on the google

Explanation:

6 0

2 years ago

What is the metric unit used to measure length? Mass? Volume? Temperature? List one tool used to measure each type of measuremen

Harrizon [31]

Length

The metric unit used to measure length in International System (SI) is meter and it is represented by letter m.

Length can be measured by a metric scale.

Mass

The metric unit used to measure Mass in International System (SI) is Kilograms and it is represented by letter Kg.

Mass can be measured by an instrument called Balance.

Volume

The metric unit used to measure Volume in International System (SI) is Liter and it is represented by letter l.

Volume can be measured by a container called graduated cylinder.

Temperature

The metric unit used to measure Temperature in International System (SI) is Kelvin and it is represented by letter K.

Temprature is measured by most common divice called thermometer.

5 0

2 years ago

A 18 kg rock starting from rest free falls through a distance of 7.0 m with no air resistance. Find the momentum change of the r

IceJOKER [234]

Find the final velocity of the rock first:

The total energy of the rock at rest:
$\frac{1}{2} mv_1^2 + mgh_1$

The total energy of the rock after 7m:
$\frac{1}{2} mv_2^2 + mgh_2$

Energy must be conserved:
$\frac{1}{2} mv_1^2 + mgh_1 = \frac{1}{2} mv_2^2 + mgh_2 \\ \\ \frac{1}{2} m(v_2^2 - v_1^2) = mg(h_1 - h_2) \\ \\ \frac{1}{2} (v_2^2 - v_1^2) = g(h_1 - h_2) \\ \\ v_1 = 0, \delta h = 7m \\ \\ v_2^2 = 2g(\delta h) \\ \\ v_2 = \sqrt{2g(\delta h)}$

Momentum must be conserved also.
Momentum with the ball at rest:
$p = m_1v_1 + m_2v_2 \\ m_1 = 18kg \\ m_2 = 6 * 10^{24}kg \\ v_1 = v_2 = 0 \\ \\ p = 0$

The total momentum is zero with the ball at rest and must remain zero.

Momentum with the ball at 7m:
$p = m_1v_1 + m_2v_2 = m_1\sqrt{2g(\delta h)} + m_2v_2 = 0$

Solving for the earth's velocity v₂:
$v_2 = - \frac{m_1}{m_2} \sqrt{2g(\delta h)}$

7 0

3 years ago