The vector product of vectors a⃗ and b⃗ has magnitude 12.0 m2 and is in the +z-direction. vector a⃗ has magnitude 4.0 m and is in the −x-direction. vector b⃗ has no x-component. part a: what is the magnitude of vector b⃗ ? (i solved this question the answer is 3 and it's correct)part b: what is the direction angle θ of vector b⃗ measured from the +y-direction to the +z-direction? (this is the part that i didn't get it correct)

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?