Answer:
32 °C.
Explanation:
Hola.
En este caso, debemos entender que la relación entre el calor y la temperatura viene dada por:
De este modo, dado que estamos estudiando la misma sustancia (agua) con masa constante, la relación calor-temperatura es lineal y directamente proporcional, por tal razón, si se duplica el calor suministrado, la temperatura también será duplicada, de modo que:
¡Saludos!
Answer:
W(fric) = -12000 J
Explanation:
Given that
mass ,m= 80 kg
Initial speed ,u= 0 m/s
Height ,h= 15 m
Final speed ,v= 0 m/s
We know that
Work done by all the forces = Change in the kinetic energy
W(fric)= - m g h
W(fric) = - 80 x 10 x 15 ( g=10 m/s²)
W(fric) = -12000 J
negative sign indicates that force and displacement is in opposite direction.
Answer:
Explanation:
Time period of Simple pendulum is given by
where L=length of Pendulum
g=acceleration due to gravity
(a)When elevator is accelerating upward with
effective g will be g+a=9.8+5
therefore time period will decrease
(b)When elevator is moving upward with 5 m/s
effective g will be g as there is no added acceleration
therefore time period will remain same
(c)When elevator is accelerating downward with
effective g will be g-a=9.8-5
therefore time period will increase
(d)When elevator is accelerating downward with
effective g will be g-9.8=0
therefore time period will become infinite