Answer:
380000 km
Explanation:
The number is 380000
From the right
The first digit is the ones place
The second digit is the tens place
The third digit is the hundreds place
The fourth digit is the thousands place
The fifth digit is the ten thousands place
The sixth digit is the hundred thousands place
While reading a number we read the first digit on the left and add which place it is at.
Then the next digit as well as the place it is at.
Here the 3 is at the hundred thousands place. So, we say three hundred.
Then we read the next digit which is 8 and is at the ten thousands place.
So, we say three hundred and eighty thousand
Answer:
a)3.86 ×10³m/s
b)4.83× 10⁷ s
Explanation:
a)
The speed that a satellite at a given radius must travel so as to orbit in the presence of gravity is given by;
where;
G is the universal gravitational constant given as 6.67 × 10⁻¹¹ N.m²/kg²
m is mass of Earth given as 5.972×10²⁴kg
r is the radius at which the satellites orbit
v is the speed of satellite
r is obtained by the sum of distance from center of Earth and height of satellite from earth
Height of satellite from earth= 11000 nautical miles
1 nautical mile=1.852 km
11000 nautical miles =?
11000*1.852 = 20372 km
1 km = 1000 m
20372 km=?
=20372000m
=2.04×10⁷ m
r= 6.38×10⁶ m +2.04×10⁷ m
r=2.68×10⁷ m
Substitute values in equation;
b)The formula for period is
where T is the period of the satellite
Substituting values
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As soon as you suspect that your computer (or any other backup-able device) is too slow or "glitch-y" you should back-up your device before you lose any important files or data.
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A) 6000J
the formula will fit in, once you know the formula you are good to answer.
<span>k.e.=1/2 mv^2
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