Explanation:
The molecules move more slowly and their average kinetic energy decreases
Answer:
21 kJ
Step-by-step explanation:
The formula for the heat q is
q = mCΔT
<em>Data:
</em>
m = 200 g; C = 4.184 J·°C⁻¹g⁻¹
T₁ = 50. °C; T₂ = 25 °C
<em>Calculations:
</em>
ΔT = T₂ - T₁
ΔT = 25 – 50.
ΔT = -25 °C
q = 200 × 4.184 × (-25)
q = -21 000 J Convert to kilojoules
q = -21 kJ
The negative sign shows that energy is released, so the water has released 21 kJ of energy.
Answer:
The egg is changed from liquid to soli
Explanation:
The law of conservation of mass states that "Matter/mass can neither be created nor destroyed but can be converted from one form to another".
Inside of the Egg is liquid in nature and during the process of cooking the egg the liquid changes to solid.
The formula to determine the wavelength is, De-Broglie wavelength formula:
-(1)
where, is wavelength, m is mass, v is velocity and h is Planck's constant = =
mass, m = 147 g (given)
Since, 1 g = 0.001 kg
So, 147 g = 0.147 kg
v = 91.0 mph (given)
Converting mph to mps:
Since,
So, =
Substituting the values in formula 1:
Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is
.
Answer:
volume of box is 38.81 cm³.
Explanation:
Given data:
Width of box = 4.5 cm
Height of box = 5.750 cm
Length of box = 1.50 cm
Solution:
Formula:
Volume = length × height × width
by putting values,
V = 1.50 cm × 5.750 cm× 4.5 cm
V = 38.81 cm³
Thus, the volume of box is 38.81 cm³.