Neither of those questions makes sense, and I believe that you should not waste your time worrying about them.
#61 gives you a lot of information about a ball, and then asks a question about a glove.
#62 gives a mysterious equation, doesn't tell you what either of the variables represents, and then asks for a quantity without ever telling us how that quantity is related to the equation.
Personally, my response to both questions would be "Insufficient information given".
Answer:
ΔV = ±0.175 cm
Explanation:
The equation for volume is
V = π/4 * d^2 * h
All the measurements are multiplied. To propagate uncertainties in multiplication we add the relative uncertainties together.
The relative uncertainty of the diameter is:
εd = Δd/d
εd = 0.0005/5.1 = 0.000098
The relative uncertainty of the height is:
εh = Δh/h
εh = 0.005/37.6 = 0.00013
Then, the relative uncertainty of the volume is:
εV = 2 * εd + εh
εV = 2 * 0.000098 + 0.00013 = 0.000228
Then we get the absolute uncertainty of the volume, for that we need the volume:
V = π/4 * 5.1^2 * 37.6 = 768.1 cm^3
So:
ΔV = ±εV * V
ΔV = ±0.000228 * 768.1 = ±0.175 cm
Answer:
Moon and Earth both exert equal force on each other
Explanation:
As we know by the universal law of gravitation the force of gravitation is given by the formula
This is the mutual gravitational force on Earth and Moon by which they attract each other.
So here the force of attraction due to Earth on Moon as well as the Force due to Moon on Earth both will be same in magnitude and opposite in direction.
So here both forces is given as
Moon and Earth both exert equal force on each other
Answer:
Explanation:
You didn't ask a question here, but I assume you want the pressure? You can use the ideal gas equation stating that:
PV = nRT
The 'P' is pressure, the 'V' is volume, the 'n is number of moles of gas, the 'R' is the ideal gas constant, and the 'T' is the temperature. First convert the Celsius degrees into Kelvin by using the following relation:
C + 273.15 = K
4 + 273.15 = 277.15K
Now, find the volume of a cylinder by using:
The 'l' is the length of the cylinder
Now just plug and chug everything into the ideal gas equation: