Explanation:
If the forces are not balanced on an object, the object experiences an overall net force. This will change the object's velocity.
Answer:

Explanation:
Given data:
0.1 L HCl × 1.020 mol/L = 0.102 mol HCL
0.05 L NaOH × 2.040 mol/L = 0.102 mol NaOH
NaOH + HCl \rightarrow H_2O + NaCl
0.102 mol HCl /1 mol HCl × 1 mol H2O = 0.102 mol H2O
0.102 mol H2O / 1 mol H2O × 57000 J = 5814 J

M(t)=150*1=150 g
we know that heat energy is given as

where c is specific heat
total energy released is = 57 \times 0.102 = 5.814 kJ


<span>In real machines, efficiency is always less than 1 .</span>
Answer:
560 m
Explanation:
The speed of sound in air is approximately:
v ≈ v₀ + 0.6T
where v₀ is the speed of sound at 0°C (273 K) in m/s, and T is the temperature in Celsius.
The speed of sound at 20°C at that altitude is:
v ≈ 327 + 0.6(20)
v ≈ 339 m/s
The sound travels from the hikers to the mountain and back again, so it travels twice the distance.
339 m/s = 2d / 3.3 s
2d = 1118.7 m
d = 559.35 m
Rounding, the mountain is approximately 560 m away.