A wave with a wavelength of 4.0 m has a frequency of 2 Hz. Calculate the speed of this wave. O 2 m/s
O 8 m/s
O 6 m/s
O 0.5 m/s

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move

Which term defines a powers shared by state and federal governments? a. concurrent. b. expressed. c. implied. d. reserved

A50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured periodically. after 19.7 days, the amount of radioactive substance had decreased to 3.13 mg. what is the half-life of the unknown radioactive substance?