You need air flowing through the boat. I second alternative is to get a smoke detector of some kind.
Hope it helped!
Percentage of human sperm cells carry an X chromosome is C 50%
Answer:
As the variables are not given, let us help with general explanation on manipulated variable.
Explanation:
A manipulated variable is an independent variable. In a scientific experiment, an independent variable can be described as a variable which can change naturally or which is changed by the researcher to check its effect on the dependent variable. The dependent variable is the variable which is under study and being tested.
For example, to check the difference in photosynthesis rate by light, the amount of light will be the independent variable and the rate of photosynthesis will be the dependent variable.
Warm blooded animals are much stronger and like aligators , reptiles and different warm blooded animals
