A2000 kg car drives around a circular exit ramp with a radius of 30 meters. the car drives all the way around the ramp in 10 seconds. how fast is the car driving? "

The car is driving at the speed of  18.85 meters per seconds.

Explanation:

Given:

The radius of the circular exit ramp   =  30 meters

Mass of the car = 2000 kg

Time  = 10 seconds

To Find :

The Speed of the car = ?

Solution:

We know that speed  =  ---------------(1)

Here the distance is the circumference of the circular exit ramp

Then circumference  =

where r is the radius

On substituting the values

Distance =

Distance  = 188.5 meters------------------------(2)

Substituting (2) in (1)

speed = seconds

Speed = 18.85 meters per seconds

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

see earlier answer