I believe the answer is: <span>no proven permanent method of disposal has yet been devised.
Since the halflive of nuclear substance is really long, disposing it by using the conventional method of disposal is deemed to be really dangerous for the environment around it. Currently, scientists are working to devise a perfect deep geological disposal for the nuclear material.</span>
Answer:
D) all are true
Explanation:
the banks of a river so that they could enforce manual labor, a deep inland near a road system for travelling/trading, outside of the city to be secluded from the main area but still close enough to the shop for supplies. all answers are correct.
Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
Yes, this a true statement. Vote me Brainliest ! :)
This is false.
"<span>At birth, your </span>baby<span> sees only in black and white and shades of gray. Nerve cells in their retina and brain that control </span>vision<span> are not fully developed. Also, a </span>newborn infant's<span> eyes don't </span>have<span> the ability to accommodate"
Source:
http://www.allaboutvision.com/parents/infants.htm
I hope this helps!</span>
