A mass on a spring vibrates in simple harmonic motion at a frequency of 4. 0 hz and an amplitude of 4. 0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t =0), what is the acceleration magnitude when t = 3 s?.

Panthers and leopards prey on deer in an ecosystem. for unknown reasons, the population of leopards increased drastically. what are the likely effects of this change on the species? 1. more food for panthers and more competition for leopards 2. less food and more competition for panthers 3. fewer deer and more competition for panthers 4. more food for deer and less competition for panthers and leopards 5. more food for leopards and less competition for panthers

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers

How are brightness and size related when it comes to stars