Search & Filtering
the following data were obtained by sampling a population
5
3
7
5
6
8
6
5
9
Compute for the mean.
An object is projected from the ground with an initial velocity of 28.5m/s at 350 above the horizontal. Find the following:
(a) horizontal and vertical components of its initial velocity,
(b) time to reach the maximum height,
(c) time of flight,
(d) maximum height,
(e) the speed at the maximum height
(f) range, and
(g) velocity upon striking the ground.
Find the formula of the compound with the percent composition shown
O, 41.26
P, 19.97
Ca 38.76
the momentum of the bed is 300 kg, m/s with the velocity of 20 m/s, what is its mass?
the momentum of the bed is 300 kg, m/s with the velocity of 20 m/s, what is its mass?
At what angle of incidence is light completely polarized after reflection from a surface of water? What is the corresponding angle of refraction? Assume that light is incident from air. The n of water=1.33.
A population has mean 75 and standard deviation 12.
a.)Random samples of size 121 are taken. Find the mean and standard deviation of sampling distribution of the means?
b.)How would the answers to part (a) change if the size of the samples were 400 instead of 121?
In a reaction between Mg and hydrochloric acid:
Mg(s) + HCl(aq) —> MgCl2(aq) + H2(g)
Given the data below. Examine the data. What is the average rate of reaction?
Time
2
6
8
Mass of Magnesium
0.012
0.010
0.006
0.004
8. What is [H3O+] for a 0.500 M solution of hydrochloric acid? Make sure you include the ionization equation. (2 marks)
9. If 2.50g of the strong base lithium hydroxide is dissolved in 1.50 L of solution, what is the concentration of hydroxide ions? Make sure you include the dissociation equation. (3 marks)?
- A gas has a pressure of 699.0 mm Hg at 313 K. What is the temperature at standard pressure 760 mmHg?
