A lens with a focal length of 35cm is used to form an image of an
object. When this lens is placed a
certain distance X from the object,
no image is formed. Give this
distance X in cm.

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented. b)scientists had not completely finalized their results, which took 30 years. c)cigarettes were cheaply available and media channels were very inefficient. d)cigarette manufacturers were trying hard to bring an alternative into the market

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Decreased sensitivity to an unchanging stimulus is known as