A puppy has 245 J of KE. It has a velocity of 7 m/s. What is it's mass?

10kg

Explanation:

Given that:

Kinetic energy of puppy = 245J

Velocity of puppy = 7 m/s

mass of puppy = ?

Recall that kinetic energy is the energy possessed by a moving body. It is measured in joules, and depends on the mass and velocity of the moving body

i.e K.E = 1/2 x mass x (velocity)^2

245J = 1/2 x mass x (7 m/s)^2

245 = 0.5 x mass x 49

245 = 24.5 x mass

Mass = 245/24.5

Mass = 10kg

Thus, the mass of the puppy is 10kg

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation:

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.