Flag a) Un carro de ferrocarril de 20,000 Kg, denotado como A, viaja a una rapidez de 30.0 m/s hacia la derecha y golpea a un carro idéntico (igual masa), B, en reposo. Si los carros quedan enganchados como resultado de la colisión, ¿cuál es su rapidez después de la colisión?

b) Calcule la velocidad de retroceso de un rifle de 4.0 Kg que dispara una bala de 0.015 Kg a una rapidez de 600 m/s.

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )

answer: 414,377,008

step-by-step explanation:

just multiply it

but which class are u may know that first

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.