How does the Doppler effect cause a siren's pitch to increase as it approaches you?
A. Sound waves are spread out, decreasing wavelength and
increasing frequency.
B. Sound waves are spread out, increasing wavelength and
decreasing frequency.
C. Sound waves are pushed closer together, increasing wavelength
and decreasing frequency.
D. Sound waves are pushed closer together, decreasing wavelength
and increasing frequency.

my answer is c

Explanation:

the sound waves get closer together, increasing their frequency. This listener hears the pitch of the siren get higher. As the car speeds away from listener B, the sound waves get farther apart, decreasing their frequency.

nah.   i'm just sleepy.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.