Um grupo de amigos reunidos em um clube cria, de brincadeira, uma corrida chamada "Maratônica". Nela, os competidores são obrigados, pelo regulamento, a tomar 100 mililitros de água tônica a cada 300 m corridos, em um percurso de 2,5 km.

O percurso total da maratona no SI é igual a:

a) 300 km

b) 2500 m

c) 2,5 m

d) 2500 km

e) 300 m

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move

Acar driving 22.7 m/s on flat ground drives off a 42.3 m high cliff. how much time does it take to reach the ground?