10 A car has a mass of 1000 kg and a momentum of 12000 kgm/s. What is its kinetic energy?
1 answer:
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Answer:
D. (7 ÷ 9) × 100
Explanation:
In order to solve this problem we need the answers of the problem, performing an internet search this problem is found, with the different answer options
A. (7 − 9) × 100
B. (9 − 7) × 100
C. (9 ÷ 7) × 100
D. (7 ÷ 9) × 100
Returning to the problem of the total energy of 9V only 7 volts were used. If we make a rule of three we realize that:
x = 77.77%
In this way we determine that the answer is D.
The corresponding frequency of this sinewave, in kHz, expressed to 3 significant figures is: 155 kHz.
<u>Given the following data:</u>
- Period = 645 μs
Note: μs represents microseconds.
<u>Conversion:</u>
1 μs = ×
seconds
645 μs = ×
seconds
To find corresponding frequency of this sinewave, in kHz;
Mathematically, the frequency of a waveform is calculated by using the formula;
Substituting the value into the formula, we have;
Frequency = 1550.39 Hz
Next, we would convert the value of frequency in hertz (Hz) to Kilohertz (kHz);
<u>Conversion:</u>
1 hertz = 0.001 kilohertz
1550.39 hertz = X kilohertz
Cross-multiplying, we have;
X = ×
X = 155039 kHz
To 3 significant figures;
<em>Frequency = 155 kHz</em>
Therefore, the corresponding frequency of this sinewave, in kHz is 155.
Find more information: brainly.com/question/23460034