A wheel and axel because the axel is a rod in the door and the knob is the wheel portion. However, these things can also be considered a lever.
Answer:
A. Elements with intermediate numbers of valence electrons are the last chemically stable.
Explanation:
Answer:
b. Projectiles A & B have the same likelihood of breaking the glass since they have the same initial momentum
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c. Projectile A has the greater likelihood of breaking the glass since its momentum change is larger.
Explanation:
for option b, the two projectiles have the same initial mass and velocity, hence they posses the same amount of momentum that if sufficient enough could break the glass.
for option c, projectile A changes direction, maintaining the same speed v. Its momentum changes from from mv to -mv, since its speed changed direction.
the difference in momentum becomes
Δp = -mv - mv = -2mv
this is twice the initial momentum.
projectile B changes momentum from mv to 0
Δp = 0 - mv = -mv.
this is half of the final momentum of projectile A.
Also we know that force is proportional to to the rate of change of momentum, which is greater in projectile A, therefore projectile A impacts more force on the glass. Projectile A therefore has the greater likelihood of breaking the glass since its momentum change is larger.
Linear.
Since it is fired at a 30-degree angle, it is assumed to follow a straight line, which makes it linear.
Answer:
first order date and most recent order date
Explanation:
it was switched. column 5 should be most recent order date because it's 2020 while column 6 should be first order date because it was in 2019
