Answer:
B v1= 12.5m/s
Explanation:
As the acceleration is constant and time taken is also same and distance covered is halfed so the speed will also be halfed.
Answer:
0.0257259766982 m
Explanation:
= Atmospheric pressure = 101325 Pa
= Initial diameter = 1.5 cm
= Final diameter
= Density of water = 1000 kg/m³
h = Depth = 40 m
The pressure is
From ideal gas law we have
The diameter of the bubble is 0.0257259766982 m
Answer:
90 W
Explanation:
The power of the light bulb is given by:
where
V is the voltage of the bulb
I is the current through the bulb
In this problem,
V = 120 V
I = 0.75 A
Substituting into the equation,
Answer:
(a) increase by times
Explanation:
Natural frequency of a wave in a string is given by:
where, L is the length of the string, T is the tension in the string and is the linear density of the string.
Considering the length and linear density of the string are constant, if the tension in a string is doubled, the natural frequency of the string would:
Thus, the natural frequency of the string would increase by times.
<h3><u>Answer</u>;</h3>
Decrease
<h3><u>Explanation</u>;</h3>
- Chemical reaction may be either endothermic or exothermic based on whether they use heat energy or release it to the surroundings.
- An endothermic reaction occurs when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.
- In endothermic reactions the temperature of the surroundings decreases.