Question A7 A nuclear fission reactor uses nuclear reactions, of which the following is typical: *? +6? → 4? + ?Te + 3,? + 197 ? Write this reaction with the correct symbols in place of the question marks giving your reasons for each correct symbol.
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- . A 3.0kg cannon ball is shot from a cannon at a speed of 20m/s. The cannon is oriented50 degrees above the horizontal and the cannon’s barrel is 8.0m above the ground. Youwant to position a mat that will catch the cannon ball.a. Determine how much time the cannon ball will spend in flight.b. Draw a force diagram for three points during the cannon ball’s flight (1) while itis being shot from the cannon, (2) when it is at its maximum height, and (3) whenit is half-way between the maximum height and the mat.c. Determine the horizontal distance from the end of the barrel where you shouldplace the mat so that it will catch the ball.d. How fast is the cannon ball moving just before it hits the mat?- 46 and R4 = 24 For the following configuration, V,=44 V, R, =2 k2, R2=9, R3 = k2. Vo = ... V R2 R1 R3 R4 السؤال 11 من 18 >« يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد14
- A block attached to a spring with a stiffness of 3.4 N/m. The relaxed length of the spring is 15 cm and its current length is 10 cm. What is the vector force that the spring exerts on the block? A. (-0.34, 0, 0) N B. (0.51, 0, 0) N C. (-0.51, 0, 0) N D. (0.17, 0, 0) N E. (-0.17, 0, 0) N3. One object dropped from the top of a tall building, and one second later a second object is dropped. Neglecting air resistance, the distance between the falling objects will a. Be constant b. Decrease c. Increase d. Depend on their weight e. Depend on the speed of the plane. Explain your reasoning:+y mg +x Surface is frictionless Pulley is massless and frictionless
- 5. Calculate the magnitude of he gravity acceleration on the surface of the moon, ignore the gravity effect of he earth, the moon has a mean radius of 1948 km and a mass of 7.58 X 10 22 kg. Ans. 1.332 m/sec²8. You are riding a roller-coaster going around a vertical loop, on the inside of the loop. If the loop has a radius of 55.0 m, how fast must the cart be moving in order for you to feel 2.75 times as heavy at the bottom of the loop? X 44.96 m/s E 30 J R V 96 T FO G B MacBook Air 20 Y H & 7 N w 8 CHI M ( 9 K MOSISO FO O P command option