If a 500 kg load is to be lifted with a 100N effort using a first class lever at what distance from the fulcrum must the effort be aaplied when the load is 20cm away from the fulcrum​

Explanation:

Hey there!

According to the question;

Load (l) = 500 kg

Effort (e) = 100 N

Load distance (ld) = 20cm

Effort distance (ed) = ?

According to the principal of lever;

L*LD = E*ED

500*20 = 100*ED

ED = (500*20)/100

Therefore, the Effort must be applied at 100 cm.

Hope it helps!

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made

b and d are your answers i just answered this question