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What does gross of something mean?
The term "gross" refers to the total amount before any deductions, such as taxes, expenses, or allowances. For example, gross income is the total earnings before taxes are taken out, while gross sales represent total revenue from sales before returns or discounts. Essentially, it provides a measure of the overall value without considering any subtractions.
An airman was within 20 meters of an ied blast?
Because he was 20 meters away from the blast, unless mission priority supersedes he requires 24hr rest and a medical evaluation before considering return to duty.
How old is Pythagoras' theorem?
Although t is known as Pythagoras' theorem and thus about 2500-2600 years old, considering Pythagoras lived between 5th and 6th century BC, it was known before this. There is evidence that the Babylonians of 20th to 16th century BC (some 1000 years before Pythagoras) knew it, making it about 3600-4000 years old.
Suppose a diver leaps from the edge of a cliff 80 feet above the ocean with an initial upward velocity of 8 feet per second How long will it take the diver to enter the water below?
Assuming that acceleration dut to gravity is 32 ft/sec2 and that air resistance is insignificant, the answer is 2.5 seconds. To show work, at 8 ft/sec v = at = 32 t t = 1/4 second jumping up and v = 0 before free fall s = 1/2 at^2 = 16t^2 = 16x.25 x .25 = 1 foot so diver free falls 81 feet 81 = 1/2 at^2 so t = 2.25 sec 2.25 + .25 = 2.5 sec
Does the CHF currency sign come before or after the number?
Usually before. Usually before. Usually before. Usually before.
Why is terminal velocity with a parachute open less than the terminal velocity before it was open?
because there is more air resistance
What is the correct term for the greatest velocity an object can reach before air resistance knocks it down?
The term you're looking for is "terminal velocity," which is the maximum velocity an object can reach as it falls through a fluid like air, balancing the force of gravity with the force of air resistance.
What is absolute velocity is it the other name for the velocity of a free falling body when the net force of air resistance and gravity is zero?
Absolute velocity refers to the speed and direction of an object relative to a fixed point, regardless of any external factors. In the context of a free falling body with zero net force due to air resistance and gravity, its absolute velocity would be constant and equal to the velocity just before air resistance became negligible.
What happens before terminal velocity takes place?
Before terminal velocity is reached, an object will be accelerating due to the force of gravity. As the object accelerates, air resistance (drag) will increase, which will gradually counteract the force of gravity until the two forces are equal and the object reaches terminal velocity.
Does a skydivers decreases her acceleration when falling 5 seconds before reaching her terminal velocity?
No, a skydiver's acceleration remains constant as they fall towards their terminal velocity. This is because terminal velocity is the point at which the forces of gravity and air resistance are balanced, resulting in a constant velocity.
Is the velocity of arrow just when it was released from the bow same as that with which it strikes the pendulum?
Yes, the velocity of the arrow when it is released from the bow is the same as the velocity with which it strikes the pendulum, assuming no external forces like air resistance act on it. The arrow's initial velocity is conserved until it impacts the pendulum, meaning that its speed remains constant in the absence of such forces. However, in real-world scenarios, factors like air resistance can slightly reduce its velocity before impact.
Why does an object with a large surface area reach terminal velocity before an object with a small surface area?
An object with a large surface area experiences more air resistance, which increases as the object accelerates. This causes the object to reach terminal velocity quicker compared to an object with a smaller surface area, which experiences less air resistance and takes longer to reach terminal velocity.
How does the weight of a falling body compare with the air resistance it encounters before it reaches terminal velocity?
The weight exceeds the force of air resistance, but as the speed increases the air resistance increases, so the net force (weight - air resistance) falls. When the difference becomes zero the acceleration ceases and you have terminal velocity.
How does initial velocity affect the projectile in range?
The initial velocity of a projectile affects its range by determining how far the projectile will travel horizontally before hitting the ground. A higher initial velocity will result in a longer range because the projectile has more speed to overcome air resistance and travel further. Conversely, a lower initial velocity will result in a shorter range as the projectile doesn't travel as far before hitting the ground.
Does rain reach terminal velocity?
No, raindrops do not reach terminal velocity because they are too small and have a low enough mass that air resistance slows them down before they can reach their maximum falling speed. Terminal velocity is typically reached by larger objects like skydivers or hailstones.
What is terminal velocity for a mouse?
The terminal velocity for a mouse is estimated to be around 10 mph (16 kph). This means that when a mouse falls from a height, it will reach a maximum speed of about 10 mph before air resistance balances the force of gravity.
What is the formula for perfectly elastic collision?
Total momentum before = total momentum afterTotal kinetic energy before = total kinetic energy afterSum of x-components of velocity before = sum of x-components of velocity after.Sum of y-components of velocity before = sum of y-components of velocity after.Sum of z-components of velocity before = sum of z-components of velocity after.
