Một dây dẫn mảnh được uốn thành một cung tròn bán kính 10cm, góc ở tâm bằng 1200, đặt trong không khí. Trong dây dẫn có dòng điện cường độ 30A chạy qua. Độ lớn của cảm ứng từ tại tâm của cung tròn là bao nhiêu ?

PLEASE HELP! Math (recursive sequences) PLEASE HELP THIS IN"T MY WORK BUT I'M USING MY SISTERS ACCOUNT Write the word saw or seen on each blank line to correctly complete the sentences.1. I ________________ many colorful birds at the park yesterday.2. Kara has never ________________ the waterfall in the creek. 3. Have you ____________________ my car keys? 4. Two days ago, Carlos ____________________ a magician pull a rabbit out of a hat.5. Gina ____________________ a cloud that was shaped like a dinosaur.6. Frankie ____________________ that movie a long time ago.7. We have ____________________ many kittens at the animal shelter.8. Peter, Isla, and Abby ____________________ Mrs. McMurray shopping at the store.9. My dog had ____________________ the squirrel that scurried across the front yard.10. Do you think Mr. Henshaw has ____________________ the video already? Solve for z3z-5+2z=25-5z University Car Wash built a deluxe car wash across the street from campus. The new machines cost $234,000 including installation. The company estimates that the equipment will have a residual value of $27,000. University Car Wash also estimates it will use the machine for six years or about 12,000 total hours. Actual use per year was as follows: Year Hours Used 1 2,800 2 1,900 3 2,000 4 2,000 5 1,800 6 1,500Required:a. Prepare a depreciation schedule for six years using the straight-line method.b. Prepare a depreciation schedule for six years using the double-declining-balance method.c. Prepare a depreciation schedule for six years using the activity-based method. What happens if you move a magnet near a coil of wire?A) current is inducedB)power is consumed C)the coil becomes magnetizedD) the magnets field is reduced I am confused and need help with the question above?? Which of the following is NOT a characteristic of life? A.Made of one or more cellsB.MovementC.Requires EnergyD.Adapts over time How did Martin Luther King, Jr. react to the arrest of Rosa Parks? 1He called for people to give money to Rosa Parks's defense team.2He called for the people of Montgomery, Alabama to boycott all city buses.3He called for the segregation of all Montgomery, Alabama city buses. 33. Given the following algebraic expression 5x + 10 Which statement is true?a. The coefficient is 5b. The constant is 2C. The power is 10d. The constant is 5 how do i solve this equation again?? its y=mx+b How does the direction of light affect photos? A backpack that normally sells for $40 is on sale for $38. Find the percent of increase or decrease. *20 POINTS* (PLS SHOW WORK) what is the difference between the domain and the range of a function? What is the best way to use specialized vocabulary in an oral report, so that your listeners still understand you? A crane raises a crate with a mass of 150 kg to a height of 20 m. Given thatthe acceleration due to gravity is 9.8 m/s2, what is the crate's potential energyat this point? Find the distance between a point (7, 19) and a horizontal line at y = 3. what is 2/3 of 4 hours and 30 minutes? find the points on the y-axis, each of which is at a distance of 13 units from the point (-5,7) The points (4,1) and (x, -6) lie on the same line. If the slope of the line is 1, what is the value of x? A. X = -3 B. X = 3 C. X = 9 D. X = 11 Anyone know any good books to study exam style questions for 9th grade biology?