Two workers are pushing on the same large crate. One worker pushes east with a force of 875 N, while the other worker pushes
north with a force of 960 N. Friction between the crate and the
floor is directed west with a force of 80 N and south with a force
of 105 N. Assuming drag due to air resistance is negligible, what
are the total north-south net forces and the total east-west net
forces acting on the crate, causing it to accelerate across the
floor? (1 point)
O 795 N to the north and 855 N to the east
O 855 N to the north and 795 N to the east
O 795 N to the south and 855 N to the west
O 855 N to the south and 759 N to the

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

2select the correct answer. javed suffers from a severe food allergy. which device should javed always carry? a. inhaler b. epi pen c. nebulizer d. insulin pen