Answer:
600 km
6 hours
Explanation:
El tiempo que viaja el automóvil de 6 a 10 de la mañana es 
La velocidad del coche es 150 km/hr
La distancia está dada por


A distancia recorrida a las 10 de la mañana es de 600 km.
Ahora el tiempo que se toma está dado por


El tiempo que se tarda en recorrer 900 km es de 6 horas.
<span>The factors that influence wind and contribute to global winds are pressure gradient, Rossby waves and jet streams, and local weather conditions.</span>
Answer:
- أكثر أنواع التربة خصوبة التربة
- الحمراء .
.
ج- السوداء
Answer:
487.23 N/m
Explanation:
Given:
mass of metal sphere 'm'= 0.51kg
the spring stretches from 0.12 m to 0.23 m. Therefore,
= 0.12m and
= 0.23m
the speed of the sphere decreases from 6.7 to 3.3 m/s. Therefore,
= 6.7m/s and
=3.3m/s
In order to find spring constant, we apply law of conservation of energy. i.e
The change of the kinetic energy of sphere is equal to the change of potential energy of the spring.
So, Δ
Δ
where,
Δ
1/2 m (
-
)²
Δ
= 1/2 k (
-
)²
1/2 m (
-
)² = 1/2 k (
-
)²
k= m [ (
-
)²/(
-
)²
k= 0.51 [(6.7-3.3)²/ (0.23-0.12)²]
k= 487.23 N/m
Thus, the spring constant of the spring is 487.23 N/m