Answer:
40000 N/m²
Explanation:
Applying,
P = F/A................... Equation 1
Where P = Pressure, F = Force, A = Area.
From the question,
The force(F) exerted by the person's foot is thesame as it's weight.
F = W = mg............ Equation 2
Where m = mass of the person, g = acceleration due to gravity.
Substitute equation 2 into equation 1
P = mg/A................ Equation 3
Given: m = 60 kg, g = 10 m/s², A = 150 cm² = (150/10000) m² = 0.015 m²
Substitute these values into equation 3
P = (60×10)/0.015
P = 600/0.015
P = 40000 N/m²
Answer:
The emf is 0.574 volt.
Explanation:
Given that,
Magnetic field
Length = 75.0 m
Velocity = 255 m/s
We need to calculate the emf
Using formula of emf
Where, v = velocity
l = length
B = magnetic field
Put the value into the formula
Hence, The emf is 0.574 volt.
False, the farther the wave goes from the source of energy, the less energy it has, for it uses the energy to spread out, (which means that while it is spreading out, it will lose more and more energy until there is no more)
hope this helps
The washing up liquid turns blue because pH of liquid is greater than 7.
<h3>What is pH?</h3>
pH is a measures how much water is acidic/basic in nature. The range o pH is 0 - 14. The pH value of 7 represents neutral. pH less than 7 is acidic nature. pH greater than 7 shows a base.
Sharna mixed cabbage water with colourless washing up liquid, the mixture turned blue.
Cabbage contains anthocyanin which changes color when it is mixed with an acid or a base. The pigment turns bluish-green in a pH greater than 7.
Thus, The washing up liquid turns blue because pH of liquid is greater than 7.
Learn more about pH.
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