<span>Height = y
T = 5.8 sec
tf = time to fall
ts = time for sound to travel distance y
T = tf + ts = √[2y/g] + y/330
or
(T - y/330)² = 2y/g
a quadratic in y.
</span><span>y = 141.4 m
</span>hope this helps
Motion must be defined relative to something.
Here's an obvious, everyday example:
-- You're in a passenger jet, going to visit grandma on the
coast for the holidays.
-- You're sitting still in your seat, listening to some 'mp3's,
reading a book, and dozing off.
-- At the same time, people on the ground see you flying over
at almost 500 miles per hour.
Are you moving at 500 mph, or are you not moving at all ?
The answer is 'Yes. Both.'. It just depends on who's measuring your speed.
There's no such thing as your "real" speed. Motion is always
relative to something. Different reference = different speed.
Answer:
D
Explanation:
30 m/s is the hypothenuse. The horizontal component will be x. Using trig, you can see that
Answer:
a car
A sled sliding across snow or ice.
a ball down a hill
mercury
Explanation:
I believe the answer is C