SAT, 17.02.2022 03:30 whitakers87
A xenon arc lamp is covered with an interference filter that only transmits light of 400nm wavelength. The transmitted light strikes a metal surface, a stream of electrons emerges from the metal. The filter is then replaced with one transmitting at 300 nm and the lamp adjusted so that the intensity of striking the surface is the same as it was for the 400 nm light. With the 300 nm light :-.
Answers: 1
SAT, 24.06.2019 15:10
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SAT, 26.06.2019 05:30
An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. thereās an increase in the number of snakes and insects and a decrease in the number of frogs. 2. thereās an increase in the number of snakes and insects, and the storks face increased competition for food. 3. thereās an increase in the number of storks and a decrease in the number of snakes and insects. 4. thereās an increase in the number of frogs and a decrease in the number of storks and insects. 5. thereās a decrease in the number of snakes, insects, and frogs.
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SAT, 26.06.2019 06:00
Match each fossil with the layer where itāll be present based on those conditions.
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