Tutors Answer Your Questions about Miscellaneous Word Problems (FREE)
Question 1119873: The base and the base angles of an isosceles triangle are increasing at the respective rates of 2 ft/s and 5 degrees/sec. When the base is 10 ft long and the base angles are 45°, find the rate at which the altitude is increasing?
Click here to see answer by greenestamps(13195)   |
Question 1119907: A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet above the ground. What is the speed of the rock when it hits the ground? Use acceleration due to gravity as -32 feet per second squared.
Click here to see answer by solver91311(24713)  |
Question 1119907: A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet above the ground. What is the speed of the rock when it hits the ground? Use acceleration due to gravity as -32 feet per second squared.
Click here to see answer by ikleyn(52747)  |
Question 1119906: Electricity is consumed between the hours of midnight (t = 0) and 6 a.m. (t = 6). Selected values of the rate of consumption are shown in the table below, with t measured in hours past midnight, and R(t) measured in KW per hour. Use 4 trapezoids to estimate the total amount of electricity to the nearest KW consumed between midnight and 6 a.m.
t (hours) 0 1 2 5 6
R(t) KW/hr 400 200 350 200 150
Click here to see answer by greenestamps(13195) |
Question 1120115: Maria and Josie are also figuring out the dimensions of the runners’ corral at the start line. To accommodate the number of projected runners, they’ve determined that they need a minimum area of 29,040 square feet in the corral. They have 1,364 feet of temporary fence barriers to set up the corral. They are leaving one end of the rectangular corral open as shown in the image.
Click here to see answer by ikleyn(52747) |
Question 1120194: Hi
a rectangular tank of height 1.2m and base area 3130cm^2 is half filled with water.when 62.6litres of water is added to the tank, it becomes 2/3 full.
What will be the new height of the water if another 1565cm^3 is added to the tank.
thanks
Click here to see answer by Theo(13342)  |
Question 1120319:
A roulette wheel contains 38 numbers (18 are red, 18 are black, and 2 are green). When the roulette wheel is spun, the ball is equally likely to land on any of the 38 numbers. Suppose that you bet $8 on red. If the ball lands on a red number, you win $8; otherwise you lose your $8. Let X be the amount you win on your $8 bet. Then X is the random variable whose probability distribution is as follows.
Click here to see answer by Boreal(15235)  |
Question 1120422: A step-up transformer has a primary coil with 100 loops and a secondary coil with 1500 loops. If the primary coil is supplied with a household current of 15 A at 120 V
i. What voltage is produced in the secondary circuit?
ii. What current flows in the secondary circuit?
Click here to see answer by rfer(16322) |
Question 1120423: d. The step-down transformer in a local neighborhood reduces the voltage from a 7200 V line to 120 V at the house. Using the relationships between electrical quantities in a transformer, answer the following.
1.
i. If there are 125 loops in the secondary coil, how many are there in the primary coil?
ii. What current does the transformer draw from the line if the current in the secondary coil is 36 A?
iii. What are the power input and output?
Click here to see answer by rfer(16322) |
Question 1120477: Cucumbers are on sale, so you buy 29 pounds of them at the local market for your restaurant. Each cucumber is actually 99% water. A few days later, the cucumbers have dried out to the point that each is now 91% water. How much do all your cucumbers weigh at this time?
Click here to see answer by Boreal(15235) |
Question 1120477: Cucumbers are on sale, so you buy 29 pounds of them at the local market for your restaurant. Each cucumber is actually 99% water. A few days later, the cucumbers have dried out to the point that each is now 91% water. How much do all your cucumbers weigh at this time?
Click here to see answer by rothauserc(4718)  |
Question 1120477: Cucumbers are on sale, so you buy 29 pounds of them at the local market for your restaurant. Each cucumber is actually 99% water. A few days later, the cucumbers have dried out to the point that each is now 91% water. How much do all your cucumbers weigh at this time?
Click here to see answer by ikleyn(52747) |
Question 1120477: Cucumbers are on sale, so you buy 29 pounds of them at the local market for your restaurant. Each cucumber is actually 99% water. A few days later, the cucumbers have dried out to the point that each is now 91% water. How much do all your cucumbers weigh at this time?
Click here to see answer by greenestamps(13195) |
Question 1120477: Cucumbers are on sale, so you buy 29 pounds of them at the local market for your restaurant. Each cucumber is actually 99% water. A few days later, the cucumbers have dried out to the point that each is now 91% water. How much do all your cucumbers weigh at this time?
Click here to see answer by Shin123(626)  |
Question 1120497: Like any company that sells you a product, the power company from which you get electricity charges you per unit energy. In the case of the power company the unit of energy used is the kilowatt-hour. Using the mathematical definition of electrical power, show that the kilowatt-hour is a unit of energy.
Click here to see answer by solver91311(24713) |
Question 1120496: Long conductive wires, such as those that carry electricity from the power plant to you the customer, tend to get very hot due to the amount of current as well as the amount of conductive material through which the electrons have to travel. Given that Pin > Pout and that P = I V, explain why power companies “step up” the generated voltage (~ 13,000 V) to multiple times that value (~ 360,000 V).
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 1120496: Long conductive wires, such as those that carry electricity from the power plant to you the customer, tend to get very hot due to the amount of current as well as the amount of conductive material through which the electrons have to travel. Given that Pin > Pout and that P = I V, explain why power companies “step up” the generated voltage (~ 13,000 V) to multiple times that value (~ 360,000 V).
Click here to see answer by Alan3354(69443)  |
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