Density = mass/volume = 75/25 = 3 g-mL. Hope this helps!
Answer:
C. is responsible for sliding friction and contact forces
Explanation:
Using the formula;
2x = vt
x is the distance up from the ocean floor the submarine is
v is the speed of sound in water
t is the time
Given
t = 2.3s
v = 1490m/s
Required
how high (approx) up from the ocean floor is the submarine x
From the formula;
x = vt/2
x = 1490(2.3)/2
x = 745(2.3)
x = 1,713.5m
Hence the submarine is 1713.5m high up from the ocean floor
Answer:

Explanation:
To calculate the Acceleration and the tension of the object, we start by considering the value of the Tension through its moment of Inertia and Acceleration based on the angular velocity

And 
Replacing,

The following forces occur in the body,

By this way we have the acceleration



Answer:
36.4 mph
Explanation:
Average speed is
.
After substitution, this is
.
The average speed, therefore, reduces to 36
mph, or about 36.4 mph.