Brittany, who has a mass of 75 kg, is riding at 25 m/s in her mini van when she suddenly turns into a parking lot when she see a sale for vintage cook ware. Her seatbelt brings her to a stop in 5 seconds. What is the force exterted on her by her seatbelt?

Which is not true about oxygen-17 and oxygen-18?

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.