A child is twirling a 1.81 kg object in a vertical circle with a radius of 65 cm at constant speed. The tension in the string is 52.9 N at the bottom of the circle. (a.) What is the speed of the object

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.

Why should the wavelength scale of spectroscope be calibrated