The best answer is d - while comparing the data with the hypothesis. The scientific method defines the correct steps as:
1. observation - use of the five senses to learn about something.
2. Question - where you raise questions based on your observation.
3. Hypothesis - a prediction or guess of what the answer to the question is.
4. Method - point where you test the hypothesis by carrying out an experiment.
5. Results / data - this is what happened after each step of the experiment.
6. Conclusion - where the results of the experiment are discussed and it is summarized if the prediction was true or not, based on data from the results.
Answer: 9.9%
Explanation: efficiency = (work output /work input) × 100
Note that, 1 kilocalorie = 4184 joules, hence 22kcal = 22× 4184 = 92048 joules.
Work output = 9200 j and work input = 92048 j
Efficiency = (9200/92048) × 100 = 0.099 × 100 = 9.9%
Answer:
Explanation:
The relation between orbital period T and orbital radius R is as follows .
T² ∝ R³
T ∝ R¹°⁵
So time period of orbit is proportional to radius of orbit . Higher the height , larger the orbital period . As the orbital period is larger than required , the altitude of satellite must have been larger than required .
As mass of satellite is not involved in the formula of orbital period , this is independent of mass of the satellite .
Hence the option C is correct .
Answer:
square root of 2gh
Explanation:
gh=(1/2)(v^2)
dividing both sides by 1/2, we have
2gh=v^2
therefore;
v=square root of 2gh
Displacement is 0. We use displacement when solving for velocity and since he stopped where he started, his displacement is 0.
