PLS PLS HELP and DON'T SEND LINK IF YOU DO YOU'LL BE BLOCKED GYMNASIUM PHYSICS

Exercises
1.A pendulum performs 60 complete oscillations in 2 minutes. Find the period and frequency of the pendulum.

2.The bee's wings, when it flies, oscillate at a frequency of 225 Hz. Calculate how many times its wings go up and down in 1 s as well as the oscillation period.

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the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.