Explanation:
Many would know it as a reaction force. Reaction force is the force by the surface on the object perpendicular to it's motion. So if we apply force on the sliding block perpendicular to it's direction of motion, friction will increase. ... That force is proportional to the velocity with which it is moving.
The substance that loses electrons is being oxidized and is the reducing agent.
Answer:
The correct option is that both the ends will remain neutral.
Explanation:
As the rod is grounded all of the prolonged charge will be converted to ground so the overall charge on the rod in absence of the charged ball will be equal to zero.Such that the both ends will not bear any charge.
a fórmula do calor sensível é Q = m.c.ΔT
m = massa
c = calor específico do corpo
ΔT = variação de temperatura (Tf - Ti)
quando ocorre o equilíbrio térmico, a soma dos calores trocados entre os corpos é 0:
QA + QB + QC = 0
sabendo que a capacidade térmica é o produto m.c e substituindo os demais valores fornecidos no enunciado:
QA = calor sensível do calorímetro = (6 cal/°C).(42-18)
QB = calor sensível do líquido = (85g).c.(42-18)
QC = calor sensível do bloco = (120g).(0,094 cal/g°C).(42-100)
substituindo na expressão para calcular c, o calor específico do líquido :
(6 cal/°C).(42°C-18°C) + (85g).c.(42°C-18°C) + (120g).(0,094 cal/g°C).(42°C-100°C) = 0
144cal + 2040c - 654,2cal = 0
2040c = 510cal
c = 510cal/2040g.°C
c = 0,25cal/g.°C