Answer
A compound is made of atoms of more than one or two different elements. Sorry, I really don't have an explanation as I'm not a scientist. Sorry.
Answer:
2 m/s²
Explanation:
a = Δv / Δt
a = (3 m/s − 1 m/s) / 1 s
a = 2 m/s²
Answer:

Explanation:
The acceleration of an object (or a person, as in this case) is given by

where
v is the final velocity
u is the initial velocity
t is the time interval
In this problem,
u = 20 m/s
v = 40 m/s
t = 10 s
Therefore Jill's acceleration is

aumenta su velocidad de 60 a 100 Km/h en 20 segundos. Calcular la fuerza resultante que actúa sobre el coche y el espacio recorrido en ese tiempo
Density = mass / volume. Mass = 1587g. Volume = 4.5cm x 5.2cm x 6cm = 140.4 cubic-cm. Mass/volume = 1587/140.4 = 11.3 g/cm^3.