What is the speed of the crate after ten seconds
A 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation F=1.5t where t is time in units of seconds. What is the speed of the crate after 10 s? Neglect friction.
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Kindergarten children have heights that are approximately normally distributed about a mean of 39.7 inches and a standard deviation of 2.2 inches. If a random sample of 21 is taken, what is the probability that the sample of kindergarten children
A 20 kg object is pulled across a flat surface with a force of 100 N. The force is applied at a 30° angle to the floor. After 5 s the speed is 8 m/s. What is the speed 5 s later if coefficient of kinetic friction between the object and floor i
The temperature of the steam entering the turbine is 700 F. Calculate the thermal efficiency of the cycle assuming isentropic expansion in the turbine.
James teaches a class of 300 students, and only 6 have done their homework assignment which is due today. He calls on a student at random to put a problem on the board and check to see whether he or she has done the assignment.
Approximately 8.33% of men are colorblind. You survey 8 men from the population of large city and count the number who are colorblind. What is a "success" in this situation and what is probability of success on a single trial?
A 60 g bullet moving with a speed of 500 m/s strikes a 5 kg block moving in the same direction with a speed of 30 m/s. If the bullet becomes embedded in the block, what is the final velocity and direction of the bullet/block?
Customers arrive at a bakery at an average rate of 6 per half-hour. Each customer spends an average of $2.50. What is the probability that exactly 3 customers will arrive in the next 10 minutes?
You are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers, 35 daisies and 42 lilies. Your mother likes daisies the best and you want to have 15 of those in your bouquet.
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