Since the sound you hear from the siren has a HIGHER frequency
than the sound actually coming out of the siren, you know ... from
your knowledge of the Doppler effect ... that the distance between
you and the ambulance is decreasing.
Just from the sound alone, you can't tell whether it's the ambulance
moving toward you, or you moving toward the ambulance. Either
motion would produce the same effect, because the distance between
is decreasing. You'd need to find some other way to tell which one is
producing the motion. (at least MOST of it)
The initial velocity of the 3250 Kg mass is 2.1 m/s. The distance covered by the larger mass in 5s is 4.7 cm.
In this problem, we have to apply the law of conservation of linear momentum. Note that;
Momentum before collision = Momentum after collision
m1u1 + m2u2 = m1v1 + m2v2
(2150 × 10) + (3250u1) = (2150 + 3250)5.22
21500 + 3250u1 = 5400 × 5.22
3250u1 = 28188 - 21500
u1 = 28188 - 21500/3250
u1 = 2.1 m/s
2) Again from the principle of conservation of linear momentum;
(0.40 × 3.5) + (0.60 × 0) = (0.40 × 0.70) + (0.60 × v2)
1.4 = 0.28 + 0.60v2
1.4 - 0.28 = 0.60v2
v2 = 1.87 cm/s
Using;
s = 1/2 ( u + v)t
s = 1/2(0 + 1.87) × 5
s = 4.7 cm
Learn more: brainly.com/question/8898885
Answer:
The greater the mass of a body, the greater its inertia
Answer:
wool maybe, I was a bit confused in silk and wool but wool
The gravitational effect of the moon causes both the high tide and low tides.