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slamgirl [31]
3 years ago
7

The length of a sheet of U.S standard (letter size) paper is closest to: 8 centimeters 11 centimeters 29 centimeter 300 centimet

ers
Chemistry
1 answer:
s2008m [1.1K]3 years ago
6 0
US Letter is a paper size, which measures:
8.5 inches ( width ) by 11.0 inches ( length ).
8.5 inches = 21.59 cm
11.0 inches = 27.94 cm
The length ( 27.94 cm ) is closest to 29 cm.
Answer:
C ) 29 cm
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D. It is formed by two potassium ions (2 K+) and oxide ion(O2-)

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3 years ago
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7 0
3 years ago
A ball has a mass of 140 g. What is the force needed to accelerate the ball at 25 m/s2? (Formula: F=ma) 3.5 N 115 N 165 N 4.5
Ksju [112]
<h3>Answer:</h3>

3.5 Newton

<h3>Explanation:</h3>

We are given;

Mass of the ball = 140 g

Acceleration = 25 m/s²

Required to find the force;

  • According to Newton's second law of motion, the resultant force on a body in motion and the rate of change in linear momentum are directly proportional.
  • That is; F \alpha \frac{Mv-Mu}{t}
  • Thus; F = ma , where F is the resultant force, m is the mass and a is the acceleration.

To get the force we substitute the value of m and a in the formula;

Therefore;

F = 0.14 kg × 25 m/s²

  = 3.5 N

Hence, the force needed to accelerate the ball is 3.5 N

3 0
3 years ago
Read 2 more answers
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