I traveled 6.00 km to school in 0.250 hours . What was my average speed

Answers

Answer 1

Answer:

Answer: 6.67 m/s

Explanation:

Recall that average speed is the total distance covered by a moving body divided by the total time taken. The SI unit is metres per second.

i.e Average speed = distance/time taken

Given that:

Distance covered = 6.00 km

Convert kilometers to meters

If 1 km = 1000 m

6.00 km = (6.00 x 1000) = 6000m

Time taken to school = 0.250 hours

Convert time in hours to seconds

If 1 hour = 60 minutes & 1 minute = 60 seconds

Then, 0.250 hours = (0.250 x 60 x 60)

= 900 seconds

Average speed = ?

Average speed = 6000m/900s

= 6.67 m/s

Thus, your average speed to school is 6.67 m/s

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Who developed the heliocentric model

Answers

the astronomer who built the heliocen model was nicolaus copernicus

Nicolaus copernicus on his death bed proposed that the sun was in the middle of the solar system

Name a latitude where each of the following occurs: polar easterlies, westerlies, and trade winds.

Answers

Polar easterlies:60-90 degrees

Westerlies: horse latitude

Trade winds: 30 degrees

Explanation:

The global wind model is also known as the "general circulation" and the surface winds of the particular hemisphere are divided into three wind belts.

Answer:

1) Polar Easterlies lie- From 60 to 90 degrees latitude.

2)Prevailing Westerlies also known as westerlies lie - From 30 to 60 degrees latitude.

3)Tropical Easterlies is also known as trade winds lie - From 0 to 30 degrees latitude (aka Trade Winds).

Explanation:

The global wind trend is also referred to as "general circulation," and each hemisphere's ground winds are classified into 3 wind belts namely

1) Polar Easterlies lie- From 60 to 90 degrees latitude.

2)Prevailing Westerlies also known as westerlies lie - From 30 to 60 degrees latitude.

3)Tropical Easterlies is also known as trade winds lie - From 0 to 30 degrees latitude (aka Trade Winds).

While performing an experiment involving a reaction between two chemicals, the scientist observes that the reaction container has become warm. The observation is an example of:

Answers

Explanation:

In an exothermic reaction, heat is released into the surroundings. In this type of reaction, energy of products is less than the energy of reactants.

In an endothermic reaction, heat is absorbed by the reactant molecules. In this type of reaction, energy of products is more than the energy of reactants.

Therefore, we can conclude that while performing an experiment involving a reaction between two chemicals, the scientist observes that the reaction container has become warm. The observation is an example of exothermic reaction.

When an object is becomes warm its an example of exothermic reaction.

What is the final temperature when a 3.0 kg gold bar at 99 0C is dropped into 0.22 kg of water at 25oC?

Answers

Answer:

46.9 C

Explanation:

The heat released by the gold bar is equal to the heat absorbed by the water:

$m_g C_g (T_g-T_f)=m_w C_w (T_f-T_w)$

where:

$m_g = 3.0 kg$ is the mass of the gold bar

$C_g=129 J/kg C$ is the specific heat of gold

$T_g=99 C$ is the initial temperature of the gold bar

$m_w = 0.22 kg$ is the mass of the water

$C_w=4186 J/kg C$ is the specific heat of water

$T_w=25 C$ is the initial temperature of the water

$T_f$ is the final temperature of both gold and water at equilibrium

We can re-arrange the formula and solve for T_f, so we find:

$m_g C_g T_g -m_g C_g T_f = m_w C_w T_f - m_w C_w T_w\nm_g C_g T_g +m_w C_w T_w= m_w C_w T_f +m_g C_g T_f \nT_f=(m_g C_g T_g +m_w C_w T_w)/(m_w C_w + m_g C_g)=\n=((3.0)(129)(99)+(0.22)(4186)(25))/((0.22)(4186)+(3.0)(129))=(38313+23023)/(921+387)=(61336)/(1308)=46.9 C$

Answer:

$T_(f)=46.9C$

Explanation:

Given:

$m_(g) =3.0kg$ $m_(w) =0.22kg$

$T_(g)=99 C$ $T_(w)=25C$

$c_(p,g)=129J/kg.C$ $c_(p,w)=4186J/kg.C$

Unkown:

$T_f=?$

Formula:

$T_f=(m_g.c_(p,g).T_g+m_w.c_(p,w).T_w)/(m_w.c_(p,w)+m_g.c_(p,g))$

Step by step solution:

$T_f=((3)(129)(99)+(0.22)(4186)(25))/((0.22)(4186)+(3)(129))$

$T_f=(61336)/(1308)$

$T_f=46.9C$

The Earth's axis of rotation is tilted. Because of this, the amount of sunlight an area on the planet receives each day variesdepending on the time of year. These variations result in four distinct seasons.
The diagram below shows the Earth at one particular point in its yearly revolution around the Sun.
Image courtesy of NASA
When the Earth is in the position shown above, the Northern Hemisphere experiences the start of
hemisphere is tilted
the Sun
because that

Answers

Answer:

the answer is the one that is tilted away from the sun because that is winter

Explanation:

i hope that i helped

What are two ways to change the state of a substance?

Answers

Solid to liquid
Liquid to solid

By adding or removing heat energy aka thermal energy

By adding or removing thermal energy

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