Abicycle has wheels of 0.70 m diameter. the bicyclist accelerates from rest with constant acceleration to 22 km/h in 10.8 s. what is the angular acceleration of the wheels?

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?