Answer:
b) directional
Explanation:
The prediction that alcohol slows reaction time is Directional . This is because for alcohol to be known as one which slows reaction time means there have been various hypothesis conducted which supports this.
In this case, formulation of a null hypothesis is usually necessary which means that alcohol does not slow reaction time and another alternative hypothesis that suggests that alcohol slows reaction time.
Answer:
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Explanation:
Answer: its linear momentum is 1.78 × 10²⁹ kg.m/s
Explanation:
Given that;
mass of Earth m = 5.972 x 10²⁴ kg
radius r = 1.496 x 10¹¹ m
period t = 3.15 x 10⁷ s
now we know that Earth rotates in a circular path so the distance travelled per rotation is;
d = 2πr we substitute
d = 2π × 1.496 x 10¹¹ m
= 9.4 × 10¹¹ m
Now formula for speed v is;
v = d/t
we substitute
v = 9.4 × 10¹¹ m / 3.15 x 10⁷ s
v = 2.98 × 10⁴ m/s
now we determine the linear momentum p
linear momentum p = mv
we substitute
p = (5.972 x 10²⁴ kg) × (2.98 × 10⁴ m/s)
p = 1.78 × 10²⁹ kg.m/s
Therefore its linear momentum is 1.78 × 10²⁹ kg.m/s
Answer:
A vibration is a repeated back-and-forth or up-and-down motion.
Explanation:
Waves carry energy through empty space or through a medium without transporting matter.
Answer:
The acceleration of the object is 314.57 m/
.
Explanation:
From Newton's second law of motion,
F = ma
where: F is the force applied on an object, m is the mass of the object and a is the acceleration of the object.
⇒ a = 
In the given question, the resultant force, F should be determined.
Total horizontal force, 
= 16 - 126
= -110 N
The horizontal force applied to the object is 110 N to the left.
Vertical force, 
= 4 N.
Resultant force, F = 
= 
= 
= 110.0727
Resultant force, F = 110.1 N
So that,
a = 
= 314.5714
a = 314.57 m/
The acceleration of the object is 314.57 m/.
