<span>C. 3
Due to the different speeds of P and S waves, a single seismometers can determine the distance to an earthquake. So, for a single station, the localization is any point on a circle around the station. With 2 stations, you'll have two circles that intersect at two points. The 3rd station is needed in order to determine which of the 2 points is the actual earthquake.</span>
Answer:
B. volunteer bias.
Explanation:
-Experimenter bias is when the expectations of the experimenter in regards to the outcome are communicated to the participants in any form.
-Volunteer bias refers to a situation in which the people that volunteer to take place in a study doesn't represent the general public.
-Research bias is when the experimenter influence the result to get a specific outcome.
-Social desirability bias is when the people taking part in a study give their responses in a way that is viewed as favorable.
According to this, the answer is that the situation would be an example of volunteer bias.
Answer:
1.152 GB if it will be at 128 kbps quality
Explanation:
So, let's say you choose your mp3 be 128 kbps (kilobits per second).
One byte is 8 bits. So 128 kbps = 16 kilobytes per second.
There is 60*60 seconds in one hour. So 16*60*60 = 57.6 megabytes per hour
Multiply by 20 hours to get your answer: 57.6*20 = 1152 MB = 1.152 GB.
Answer:
Foreign key is the correct answer for the above question.
Explanation:
- A foreign key is a key that is used to extract the information of a foreign table with the help of primary key value. When there is a normalized table then it needs to split on two or more tables to overcome the problem of normalization.
- So is there is a two table then the primary key is used for the first table and the combination of the primary key and foreign key is used to identify the record of the foreign table. The foreign key is made up of multiple fields because there is no single field in the foreign which can not be null for any instance of the primary table. It happens when there is data for the primary table but there is no record for the foreign table.
- The above question wants to ask about the term which is made up of multiple fields which is a foreign key which is described as above. Hence Foreign key is the correct answer for the above question.
