A car drives west with a speed of 65 km/h. What is the car's speed? What is the car'svelocity?!

Answers

Answer 1

Answer: Speed = 65 km/h
Velocity = 65 Km/h due west

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A plane flying against a jet stream will travel faster than a plane traveling with a jet stream.

Answers

Their "airspeeds" (speed through the air) are equal, but the one traveling in the
same direction as the jet-stream appears to move along the ground faster.

FALSE, THE PLANE HAS MORE RESISTANCE THAN THE PLANE TRAVELING WITH THE JET STREAM

What is one property of a wave that determines how much it will diffract when it encounters an obstacle?-speed
-amplitude
-polarization
-wavelength

Suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?
-diffraction
-destructive interfernce
-standing wave formation
-constructive interfernce

The formation of a standing wave requires
-the traveling of a wave for a long distance
-constructive interference between two waves of slightly different frequencies
-that refraction and diffraction occur at the same time in a wave
-interference between incoming and reflected waves

Answers

1) D -wave length
2) B-destructive interference
3)D -interference between incoming and reflective waves

What is the resultant displacement of a dog looking for its bone in the yard, if the dog first heads 55° north of west for 10.0 m, and then turns and heads west for 5.00 m?

Answers

Answer:

c = 13.5 m

Explanation:

from the attached diagram, we can apply the cosine rule to get the resultant displacement (c) where

c = $\sqrt{a^(2)+b^(2)-2.a.b.cosθ}$

from the diagram β = 55 degrees because they are alternate angles

θ + β = 180 (sum of angles on a straight line )

θ + 55 = 180

θ = 180 - 55

θ = 125 degrees

c = $\sqrt{a^(2)+b^(2)-2.a.b.cosθ}$

c = $\sqrt{5^(2)+10^(2)-2.5.10.cos125}$

c = $√(25+100-(-57.4))$

c = 13.5 m

A person wants to shoot an arrow at a bird which is 200 m directly above her. if the arrow leaves the bow at 60 m/s will the arrow reach the bird

Answers

Answer:

No, it would reach a height of 180m and the bird is at 200m

If it takes 5 bakers 5hours to make 5 muffins how many hours does it take 100 bakers to make 100 muffins