Answer:

Explanation:
given,
turntable rotate to, θ = 5 rad
time, t = 2.8 s
initial angular speed = 0 rad/s
final angular speed = ?
now, using equation of rotational motion



α = 1.28 rad/s²
now, calculation of angular velocity



hence, the angular velocity at the end is equal to 3.584 rad/s
Answer:
3.1468 sec
Explanation:
We have given the speed of the car is 65 miles/hour
The distance traveled by the car = 100 yards
As it is given that 1 yard = 3 feet
So 100 yard =100×3=300 feet
As in question it is given that 1 mile =5280 feet
So 300 feet 
Now time taken 
If my math is correct your answer should be 3.0 but correct me if I'm wrong
The density would decrease because the mass of an object deals with the amount of atoms in the object and since none of the object was reduced "a" wouldn't be the answer. Depending on the amount and period of time that the heat is applied the liquid could change into a gas so "d" wouldn't be correct. Density is the mass÷ volume, and when you add heat to an object it could take up different amounts of space because of its particles gaining energy and spreading apart. So the density would decrease because of the volume increasing. So I believe that "c" is the answer.