To test if the chickens lacked thiamine the scientist could test the blood concentration of thiamine in the chickens on a future study, unless blood samples were taken during the original study.
In any future studies, the same experiment would need to be done but with this added measurement on both the control group and the test subjects.
Answer:
Assuming that the masses of the cars are the same
9 times
Explanation:
Kinetic energy can be computed using the formula:

Where:
KE = Kinetic energy
m = mass
v = velocity
As you can see in your problem, the velocity of the the first car mentioned is 3 times faster.
Looking at the the formula, velocity is raised to two (2). So if we put it in terms of equations this is how it will look:
Let v = velocity of the slower car
Car 1: velocity = (3v)



The increase is by a factor of 9.
Animal Types and Characteristics
Mammals:body covered by hair or furwarm-bloodedhave a backboneproduce milk
Reptiles:body covered by scalescold-bloodedhave a backbonemost lay hard shelled eggs on land
Birds:body covered by featherswarm-bloodedhave a backbonelay eggs
Insects:most are small air-breathing animals6 legs2 antennae3 body sections (head, thorax, abdomen)Spiders:also termed arachnids8 legs8 eyesthey spin webs
Aquatic Animals:most have gillsfound in lakes, rivers, and oceans