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1. Oxygen gas inside a 1200 litres gas tank has a pressure of 1.0 atm. If the temperature remains constant , how much pressure is needed to reduce its volume by one- half (1/2) ?
a capacitor that has air between its plates is connected across a potential differences of 12.0 v and stores 48.0 mu c. what is the capacitance of capacitor?
Suppose that a particle moves along a line with position function s(t) =2t^2 +3t+1 where s is in meters and t is in seconds.
a. What is its initial position?
b. Where is it located after t = 2 seconds?
c. At what time is the particle at position s = 6?
A manufacturer of isopropyl alcohol claims that their product has a mean content of 480 mL. and a standard
deviation of 21.5 mL. Assume that the variable is normally distributed.
a. If a sample is selected, what is the probability that the content will be less than 505 mL?
b. If a sample of 6 isopropyl alcohol is selected, what is the probability that the mean of the sample will be
less than 505?
A 42.1 g piece of metal alloy absorbs 181 J as its temperature increases from 25.0 C to 36.0 C. What is the alloy’s specific heat?
A 6.5 m ladder leans against a wall, making an angle of 60o with the ground. If the foot of the ladder is
push 75 cm closer to the wall in Figure 1, how far will the ladder slide up the wall?
2. An electrical company claims that the average life of the bulbs it manufactures is 1 200 hours with a standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, what is the probability that the sample mean will be less than 1150 hours? (5 points)
a. Z = - 2
b. Z = - 3
c. Z = - 4
d. Z = - 5
select atoms whose ions have an electron configuration of nd^6(n=3,4,5...).for example , the 2+ ion for V ends the electron configuration with 3d^6
check all that apply;
La
Os
Fe
Rh
Tl
Ti
A person walks 750m due north, then 250m due east. If the entire walk
takes 13 minutes, find the person's average velocity?
An object moves along a straight line. First it travels at a velocity of
12m/s for 6s and then continues at the same direction with 20m/s for 3s.
What is its average speed?
For 10s, the velocity of a car which travels with a constant acceleration,
changes from 10m/s to 20m/s. How far does the car travel?
A cyclist covers a distance of 15 miles in 2 hours. Calculate his speed.
A boy walks at a speed of 4 kmph. How much time does he take to walk a
distance of 20 km?
A car takes 4 hours to cover a distance, if it travels at a speed of 40 mph. What should be its speed to cover the same distance in 1.5 hours?
If a person drives his car in the speed 50 miles per hour, how far can he
cover in 90 minutes?
A person walks 100m in 5 minutes, then 200m in 9 minutes and finally 50
in 4 minutes. Find its average speed?
#340153 on Dec 2023