Repeated trials and replication are the same thing. <br><br> - True<br>

Why is thermal energy from the sun transferred to Earth through electromagnetic waves, instead of any other type of thermal ener

nlexa [21]

Answer: B) Electromagnetic waves can travel through empty space.

Explanation:

Conduction: This type of heat transfer happens when there is direct contact between the two object. Example: heating a pan on stove.

Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas) due to the movement of hot layers to the top and cold layers to the bottom which leads to convection currents. Example: Heating of swimming pool.

Radiation: This type of heat transfer happens when there is direct transfer of energy through empty space.The electromagnetic radiation from the surface of an object which is due to the object's temperature is radiation. Example: Heating of earth's surface.

4 0

3 years ago

How many joules of heat are absorbed to raise the temperature of 650 grams of water from 5.00c to it's boiling point, 100c

xenn [34]

Answer : The amount of heat absorbed are, 258485.5 J

Solution :

Formula used :

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

where,

Q = heat gained = ?

m = mass of water = 650 g

c = specific heat of water = $4.186J/g^oC$

$\Delta T=\text{Change in temperature}$

$T_{final}$ = final temperature = $100^oC$

$T_{initial}$ = initial temperature = $5^oC$

Now put all the given values in the above formula, we get the final temperature of copper.

$Q=650g\times 4.186J/g^oC\times (100-5)^oC$

$Q=258485.5J$

Therefore, the amount of heat absorbed are, 258485.5 J

7 0

3 years ago

A reaction occurs in a calorimeter, resulting in the starting and final temperatures shown below. What can you say about the rea

Pavlova-9 [17]

Answer:

The reaction is exothermic and ΔH is negative

Explanation:

An exothermic reaction is a chemical reaction that releases energy in the form of heat. It is the opposite of an endothermic reaction in which energy is absorbed. It is expressed in a general thermochemical equation: reactants → products + energy.

We can know that a reaction is exothermic by observing the calorimeter to know if there is an increase in temperature. Remember that an exothermic reaction leads to evolution of heat. This is observed physically as a rise in temperature.

The calorimeter initially read 21.0 and finally read 38.8 at the end of the reaction. This implies that heat was given out in the process. The reaction is exothermic and ∆H is negative.

8 0

4 years ago

PLS HELP NOW I NEED ANSWER WILL GIVE THANKS PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

nadezda [96]

Answer:

The shape of mercury orbit is egg and the second questions is basically Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or eastern horizon before sunrise, usually in twilight.

Explanation:

i hope this helped?

8 0

3 years ago

Ionic bonds generally form when the bonded elements have a difference in electronegativity greater than

sineoko [7]

Answer: 2.3

Explanation: 3.5 (O) - 1.2 (Mg) = 2.3

6 0

3 years ago

Repeated trials and replication are the same thing. - True - False