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A 50 N force is used to push a 0.65 kg metal ball from rest. If the force is applied on the ball for 0.25 seconds, what will be its final velocity?
A 0.30 kg metal ball at a velocity of 3.0 m/s hits another metal ball with a mass of 0.20 kg which is at rest. What is the velocity of the 0.20-kg metal ball if the velocity of the 0.30-kg metal ball became 2.0 m/s after the collision? Use: p before the collision (m1v1 + m2v2) = p after the collision (m1’v1’ + m2’v2’)
a runner runs 14 kılometers in 45 minutes and 30 sec-
onds. Write a program that displays the average speed in miles per hour. (Note that
1 mile is 1.6 kilometers.)
The mean of the sample means in a sampling distribution is 2.6. What is the mean of the population from which the scores are sampled?
Is it true that there are 210 possible samples when sample of 4 cards are drawn at random from a population of 10 cards numbered from 1 to 10
3.)If the weights of 500 students are normally distributed with a mean of 40
kgs and a variance Of 16 kgs2,
a. determine the percentage of students with weights lower than 50 kgs.
b. How many students have weights exceeding 55 kgs.?
The standard deviation of the number of minutes of calls of a certain subscriber is 40 min per day. A sample of 10 days gave a variance of 38 min. Test the hypothesis with α = 0.05 that the standard deviation of the call usage is not equal to 40.
A mixture of 50.0 g of nitrogen and 35.0 g of oxygen has a total pressure of 0.900 atm. What is the partial pressure of each gas?
What is the 97.5th Percentile in a t distribution with a sample size of 15?
What is the 5th percentile in a t distribution with 10 degrees of freedom
