What is the power of 10 when 157,821 is written in scientific notation?
2 answers:
<u>Answer:</u> The power of 10 in the given value is 5.
<u>Explanation:</u>
Scientific notation is defined as the representation in which a number is expressed in the decimal form. That means always written in the power of 10 form. The decimal place is put after 1 digit.
We are given a numerical value of 157,821
Converting this into scientific notation, we get:
Hence, the power of 10 in the given numerical value is 5.
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Answer:
12m/s
Explanation:
Given parameters:
Power = 6.5 x 10⁴W
Force = 5.5 x 10³N
Unknown:
The resulting velocity = ?
Solution:
The velocity of a body is related to force and power using the expression below;
Power = Force x velocity
Insert the parameters and solve for velocity
6.5 x 10⁴ = 5.5 x 10³ x velocity
velocity = = 12m/s
Answer:
The ball reaches Barney head in
Explanation:
From the question we are told that
The rise velocity is
The height considered is
The horizontal velocity of the large object is
Generally from kinematic equation
Here s is the distance of the object from Barney head ,
u is the velocity of the object along the vertical axis which is equal but opposite to the velocity of the helicopter
So
So
=
Solving the above equation using quadratic formula
The value of t obtained is