Considere a situação da Figura onde um bloco de massa parte do repouso do ponto A e escorrega por uma superfície sem atrito até atingir o ponto B.

A partir do ponto B existe atrito e observa-se que o bloco para depois de percorrer uma distância horizontal .

Qual é o valor da força de atrito?

Considere a situação da Figura, onde uma partícula de massa está em queda livre. Ignore forças de arrasto.

Num instante inicial a velocidade da partícula é . Um pouco mais tarde a sua velocidade é . Qual é a sua energia cinética inicial ?

Uma partícula move-se numa trajetória, tal como indicado na Figura. Em vários pontos , e estão indicados os vetores e .

Durante o deslocamento infinitesimal é realizado um trabalho infinitesimal . Em qual dos pontos é esse trabalho negativo?

Якою стратегією адаптації є приклад розмноження слонів?

Якою стратегією адаптації є приклад розмноження риби-місяця?

Визначте середовище існування організму на зображенні.

A un consultorio llegan pacientes con una tasa de cuatro pacientes por hora, si la llegada de pacientes sigue una distribución Poisson, responda las siguientes preguntas:

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Un 20% de los pacientes atendidos en el Hospital SANAVIDA son referidos de las Unidades de Atención Primaria (UNAP). Se selecciona una muestra de 20 pacientes para aplicar un encuesta de satisfacción con los servicios. Responda las siguientes preguntas.