The focal point of a concave mirror is halfway along the radius, therefore the radius would be 2•16= 32 cm
The answer is C. Dissociative identity disorder
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This should be easy to spot
Answer:
15√2 N
Explanation:
The acceleration is given by ...
a = F/m = 5t/5 = t . . . . meters/second^2
The velocity is the integral of acceleration:
v = ∫a·dt = (1/2)t^2
This will be 9 m/s when ...
9 = (1/2)t^2
t = √18 . . . . seconds
And the force at that time is ...
F = 5(√18) = 15√2 . . . . newtons
Da Vinci was fascinated by how timepieces operate. Based on one of his sketches, it uses the laws of motion and a vertical "flying" pendulum escapement to keep accurate time.
The pendulum's weights, in a bucket suspended from a crane-style arm, act as the clock's power source. The weights propel the pendulum from vertical post to vertical post. As it "flies" it turns precision gears, which in turn keep time. To speed up or slow the clock, adjust the weight-balance of the pendulum by adding or removing weights.
Answer:
vr = 4.336 m/s
Explanation:
We are given that;
Beat frequency is 6Hz
Speed of sound = 344 m/s
Now,
Reflective Doppler frequency; f = 235 + 6 = 241 Hz
We can calculate the observed frequency if both the source sound and the observer are moving towards each other. In this case, the formula is:
f = fo[(c + vr)/(c + vs)]
Where;
ƒ = observed frequency
c = speed of sound
vs = velocity of source (negative if it’s moving toward the observer)
ƒ0 = emitted frequency of source
Since it’s moving toward the observer, thus we can rewrite equation as;
f = fo[(c + vr)/(c - vs)]
We have that;
fo = 235 , f = 241 , c = 344 , vr=vs
Thus,
241 = 235[(344+vr)/(344-vr)]
241(344 - vr)= 235(344 + vr)
82904 - 241vr = 80840 + 235vr
82904 - 80840 = 241vr + 235vr
2064 = 476 vr
vr = 2064/476
vr = 4.336 m/s
