Explanation:
Make an observation
ask a question
form a hyposisese
make a prediction
test the prediction
use the results to fix the prediction and hypotheses
Answer:
The specific heat capacity of the metal is 0.268 J/g°C
Explanation:
Step 1: Data given
Mass of the metal = 151.5 grams
The temperature of the metal = 75.0 °C
Temperature of water = 15.1 °C
The temperature of the water rises to 18.7°C.
The specific heat capacity of water is 4.18 J/°C*g
Step 2: Calculate the specific heat capacity of the metal
heat lost = heat gained
Q = m*c*ΔT
Qmetal = - Qwater
m(metal) * c(metal) * ΔT(metal) = m(water) * c(water) * ΔT(water)
⇒ mass of the metal = 151.5 grams
⇒ c(metal) = TO BE DETERMINED
⇒ΔT( metal) = T2 - T1 = 18.7 °C - 75.0 °C = -56.3 °C
⇒ mass of the water = 151.5 grams
⇒ c(water) = 4.184 J/g°C
⇒ ΔT(water) = 18.7° - 15.1 = 3.6 °C
151.5g * c(metal) * -56.3°C = 151.5g * 4.184 J/g°C * 3.6 °C
c(metal) = 0.268 J/g°C
The specific heat capacity of the metal is 0.268 J/g°C
Answer:
Lowering the object near the ground decreases its <u>potential energy.</u>
<u></u>
Explanation:
Potential Energy : Energy possessed by the object due to its shape ,Size and Position is called potential energy.
Example :
Change in shape and size : When you compress the spring , potential energy is introduced in it . So it expand quickly when you remove your hand.
Change in position : when you swing , after attaining maximum height (extreme ends) , the swing comes back on its on .This is because at maximum height ,the swing has<u> maximum Potential energy . </u>Hence it fall back on its on because it already has potential energy.
Potential energy(P) is given by the formula :
P = mgh
where ,
m= mass of the object
g = acceleration due to gravity
h = height of the object from the ground
If the height of the object increases from the ground , its potential energy also get increase.
<u><em>On lowering the object The height of the object from the ground reduces . So potential energy also reduces.</em></u>
Answer: B
Explanation:
Graph 1 represents an endothermic reaction, Graph 2 represents an exothermic reaction.
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Noble gases have complete valence electron shells
