If an object moving with a speed of 18 m/s and has a kinetic energy of 140 j, what is the mass of the object?

m = mass of the object moving  = ?

v = speed of the object moving = 18 m/sec

K = kinetic energy of the object moving = 140 J

Kinetic energy of an object is given as

K = (0.5) m v²

where m = mass of object  , v = speed of object , K = kinetic energy of object

hence for object , kinetic energy is given as

K = (0.5) m v²

inserting the values

140 = (0.5) m (18)²

140 = 162 m

m = 140/162

m = 0.86 kg  

hence mass of the object comes out to be 0.86 kg

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50