George Washington, Revolutionary War, leadership

Kentucky derby

Letter O sounds, hands on activities, sensory exploration

Discovery through the five senses

Launch Document: AirPods Volume and Hearing Safety A student listens to music on AirPods while doing homework and studying. At first, 50% volume seems quiet. Later that day, after taking a break from listening, the same 50% volume suddenly seems much louder. The student starts to wonder whether small changes in volume can actually make a big difference in sound intensity and hearing safety. Health agencies note that repeated exposure at or above 85 dBA can increase the risk of hearing loss over time, and the louder the sound, the less safe listening time a person has . NIOSH-style exposure guidance commonly uses the idea that every increase of 3 dB cuts the recommended exposure time in half, such as 85 dBA for 8 hours, 88 dBA for 4 hours, and 91 dBA for 2 hours . Student Prompt A student says, “My AirPods were at the same volume, but after I took a break, they sounded way louder. Also, if I only turn the volume up a little, that probably does not matter much.” Use the data table and logarithms to investigate whether that claim makes sense. Calculate the decibel level for each volume setting, compare the changes in loudness, and decide which settings are safer for longer listening times. Use the formula below, where the reference intensity is I 0 = 1 × 10 − 12 I 0 =1×10 −12 watts per square meter: β = 10 log ⁡ 10 ( I I 0 ) β=10log 10 ( I 0 I ) Data Table AirPods Volume Sound Intensity I I in watts per square meter AirPods Volume Sound Intensity I I in watts per square meter 30% 1 × 10 − 10 1×10 −10 50% 1 × 10 − 8 1×10 −8 70% 1 × 10 − 6 1×10 −6 90% 1 × 10 − 4 1×10 −4 Hearing-Time Reference Decibel Level Recommended Maximum Daily Exposure Time 85 dBA 8 hours 88 dBA 4 hours 91 dBA 2 hours 94 dBA 1 hour 97 dBA 30 minutes 100 dBA 15 minutes 103 dBA 7.5 minutes

I want to create a unit about ecosystems

creating a slime

I wanna talk about the population of abandoment of animals what i would like to propose is to help pick up as many animals as i can and do like a coffee and adopt event every single fridays until we can get as many adopted