Meteorites are rocks that enter Earth’s atmosphere and only partially burn up during entry, so that the remaining mass lands on Earth’s surface. The speeds
with which meteorites strike Earth’s surface depend on their point of origin. If
they were originally small rocks that orbited Earth, their impact speed might
be as low as 10.0 km/s. If the small rocks orbited the sun, the speed with
which they collide with Earth could be as large as 70.0 km/s. Suppose a
meteorite collides with Earth with a force of –6.41 × 1012 N.
a. What is the mass of the meteorite if its impact speed is 10 km/s, so that it
has an acceleration of approximately –1.00 × 108
m/s^2?


b. What is the mass of the meteorite if its impact speed is 70 km/s, so that it
has an acceleration of approximately –490 × 109
m/s^2?

radiation

explanation:

heat is transmitted by radiation

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2