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The average cost of a certain type of grass seed is Birr 4.00. The standard deviation is
0.1 Birr. Find the minimum percentage of data values, which fall in the 3.82 to 4.18
range.
I have a question related to the refuge effect in ecological models. The assumption is that the population of hosts/prey is divided into two groups. One group consists of individuals that are safe from parasitoids/predators and another group consists of individuals that are exposed to parasitoids/predators and can get parasitized. Does it affect the growth rate in the sense that hosts that are in refuge have a bigger growth rate than those that are not in refuge? Are there some known experimental results, some papers or books that deal with this topic?
A 1450-kg
car is traveling with an initial speed of 24.0 m/s.
Determine the car's speed after −1.90 ✕ 105 J
of net work is done on the car.
Question 5.2b:
A 11.8-kg
box is sliding across a horizontal floor. It has an initial speed of 1.45 m/s
and the only force acting on it is kinetic friction with magnitude fk = 2.65 N.
Determine the distance the box will travel before coming to rest.
A toy car having mass m = 1.10 kg
collides inelastically with a toy train of mass M = 3.80 kg.
Before the collision, the toy train is moving in the positive x-direction with a velocity of Vi = 2.45 m/s
and the toy car is also moving in the positive x-direction with a velocity of vi = 4.95 m/s.
Immediately after the collision, the toy car is observed moving in the positive x-direction with a velocity of 2.25 m/s.
(a) Determine Vf, the final velocity of the toy train.
(b) Determine the change ΔKE
in the total kinetic energy. Assume friction and the rotation of the wheels are not important so that they do not affect ΔKE.
An object of mass 2 kg is launched at an angle of 30o above the ground with an initial speed of 40 m/s. Neglecting air resistance , calculate:
i. the kinetic energy of the object when it is launched from the the ground.
ii. the maximum height attained by the object .
iii. the speed of the object when it is 12 m above the ground.
Bung Tie is running along a straight line. Assume that he starts from rest from point A and accelerates uniformly for T s, before reaching a speed of 3 m/s. He is able to maintain this speed for 5 s. After that, it takes him 6 s to decelerate uniformly to come to a stop at point B.
i. Sketch a speed versus time graph based on the information given above.
ii.Find the value of T if the distance between A and B is 100 m.
iii. Determine the deceleration.
A car accelerates from zero to a speed of 36 km/h in 15 s.
i.
Calculate the acceleration of the car in m/s2.
ii.
If the acceleration is assumed to be constant, how far will the car travel in 1 minute ?
iii.
Calculate the speed of the car after 1 minute.
How many grams of O2 are required to produce 358.5 grams of ZnO?
2ZnO + O2 -> 2ZnO
Which base10 dienes blocks represent the sum of 1034 and675
A rock is thrown horizontally from the top of a cliff 88 m high, with a horizontal speed of 25 m/s. with what velocity does the rock hit
#339914 on Dec 2023