B: expands when it freezes
C: is less dense than ice
D: dissolves in most substances
In this physics problem, by using the equation of motion, it was found that the time taken for a free falling object (under gravity and ignoring air resistance) to fall the second half of its total distance (t2) is sqrt(3) times greater than the time taken to fall the first half (t1).
This question falls under the category of Physics, and represents a common problem in the study of kinematics. To answer, we first define the two halves of the journey of the falling rock. We're given that the rock covers the first half distance in t1 time and the second half distance in t2 time. Since the falling object is under the influence of gravity (ignoring air resistance), it accelerates during its descent. Therefore, t2 > t1 or t2/t1 > 1.
A classical physics equation we can use is s = ut + 0.5at^2, where 's' represents distance, 'u' is the initial velocity, 'a' is the acceleration, and 't' is the time. Since the rock is dropped, the initial velocity 'u' is 0. Hence, the equation become 's = 0.5at^2'
Since the rock is being dropped, it falls under constant acceleration due to gravity (approximated as 9.8m/s^2). For the first half of the drop, the distance is s/2 = 0.5*g*(t1)^2, and for the second half of the drop, the distance is s/2 = 0.5*g*(t2)^2.
Solving these equations can help us find the relationship between t1 and t2. If we solve for t2 in terms of t1, keeping in mind that total distance (s) and acceleration due to gravity (g) remain the same in both cases, we obtain t2 = sqrt(3)*t1 approximately, i.e., t2/t1 = sqrt(3).
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According to Newton's first law, massive objects have more inertia than small objects, which means it takes more force to move bigger things than smaller ones.
water are found to have decreased.
Name and describe the process that causes the decrease in the volume of the water, and
explain why the temperature of the water decreases.
Answer: Evaporation and heat loss to the surrounding.
Explanation:
The process is known as evaporation.
Evaporation takes place at any temperature but increases with increase in temperature. The molecules of water evaporate, that is, escape into the atmosphere thereby causing the volume of water to reduce.
The temperature decreases due to heat loss from the water into the surrounding. This will cause the temperature of the water to drop.
Answer:
M=f/a
Explanation:
F=m x a
÷a both sides
F÷a = m
M=f/a
Answer:
prominences
Explanation: