Survey research method uses questionnaires to collect information about the participants in a study.It is commonly used method of collecting information about a population of interest.
Answer:
Pleural cavity
Explanation:
Pleural cavity is thin fluid filled space that surrounds the lungs and provide lubrication during the expansion and contraction. So if the bullet enters the left lung then it has been entered in the pleural cavity.
Pericardial cavity contains heart and other blood vessals so it is not the right option. Mediastinum is the area between the lungs that contains the heart parts so it not the right option too. Then comes the vertebral canal also known as spinal cord so it has nothing to do with the lungs. Hence the correct option is Pleural cavity.
Answer:
The Kinetic energy of the Cheeto truck = 130,500 J
Explanation:
The Formula for Kinetic energy is
K.E = 1/2 x M x V^2
So in this Situation Mass(M) is 290kg
Velocity (V) is 30 m/s
Inputting these values into our equation gives us
K.E = 1/2 x 290 x 30^2
30 times 30 = 900
So K.E = 1/2 x 290 x 900
Simplifing this we get : K.E = 290 x 450
So K.E = 130,500 Kgm^2/s^2
Now the unit's Kgm^2/s^2 scientific name is Joule and symbol (J).
So K.E = 130,500 J
P.S: Oh man, now I have a craving for some Cheetos!
Answer:
Explanation:
Start by finding the weight supported by the wheels, as we can then relate that to the total frictional force through the friction coefficient. This is given by:
W=mg
Substitute 1.00×, or 1,000, for m and 9.81 m/ for g. This gives us
W=(1,000)(9.81)
W=9,810 N
Since half the weight is supported by the wheels in question, we divide this by two, and the weight we will use is 4,905 N.
The frictional force is given by:
F=μW
Where μ is the friction coefficient and W is the weight, which we just calculated. The friction coefficient for rubber on dry concrete is given in Table 6.1 as (1.0). Substitute that for μ and 4,905 N for weight and we get the total frictional force as 4,905 N. Now we can find the acceleration by rearranging F=ma to get a=. Substitute our frictional force 4,905 N for F and our total mass 1,000 kg for m to get 4.9 m/.