Answer:
500km per hour
Explanation:
if in 2 hours the airplane flies 1000 km then 1000 divided by 2 is 500km per hour.
Answer:
24 kg m/s
Explanation:
The change in momentum of the wrench is given by:
where
is its final momentum
is its initial momentum
At the beginning, the wrench is at rest together with the astronaut, so its momentum is zero:
After it is launched, its momentum becomes
where
m = 2.0 kg is its mass
v = 12 m/s is its velocity (taking the direction of the wrench motion as positive)
Substituting,
So, the wrench's change in momentum is
The density of a carbon nucleus from literature is equal to 2.01×10¹⁵ g/cm³. We will have to equate the density of the Earth to this value. First, let's find the mass of the Earth from the given data:
Volume of Earth = 4/3π(6.4×10³ km * 100,000 cm/1 km)³
Volume = 1.098×10²⁷ cm³
Mass of Earth = 5.5 g/cm³ * 1.098×10²⁷ cm³
Mass of Earth = 6.039×10²⁷ g
Then, we equate this with the density of carbon nucleus.
2.01×10¹⁵ g/cm³ = 6.039×10²⁷ g/V
V = 3×10¹² cm³
Let's equate this to the volume of a sphere of the Earth:
V = 3×10¹² cm³ = 4/3*πr³
r = 40.18 cm
The radius of the Earth should be reduced to 40.18 cm.
Answer:
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Answer:
The maximum induced emf is
Explanation:
From the question we are told that
The number of turns is
The area of the square wire coil is
The frequency of rotation is
The earth magnetic field at that location is
The induced emf is mathematically represented as
At the maximum
So
Where
is the angular velocity which is mathematically represented as
Substituting values
The maximum induced emf is