Xác định vecto cảm ứng từ tại điểm o a 7,5cm b 10 cm i 10a goc 45

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g