A police siren sounds different as it comes close to you than when it moves away from you. what term explains how this happens?

a. diffraction

b. the doppler effect

c. rarefaction

d. shockwaves

Two children are playing on the seesaw, Tommy and Jane. Now, Tommy is bit of a bigger kid and his mass is 50 kg. Jane has a much smaller mass of 30 kg. Tommy is sitting 3 meters away from the center of the seesaw.

How many squares are in 2*2 grid?

Where is the moon in relation to Earth and the sun during phase B?

What is the angular position in radians of the minute hand of a clock at 2:55?

A 5.22-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.10 m/s and its y component of velocity is - 2.82 m/s. (a) what is the kinetic energy of the object at this time?

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Is the sun considered a star?

If I get a spare in one frame and then roll a 1 and 5 in the next frame, what would my score for the spare be? A 10 B 11 C 16 D17

2x^2:3=dg solve for x

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.