Which of the following are true about the solar cycle? Which of the following are true about the solar cycle? The solar cycle is responsible for rapidly increasing temperatures on Earth in the last century. The amount of solar activity correlates with sunspot number. The solar cycle is caused by changes in the rate of nuclear fusion in the Sun's core. sunspot numbers increase and decrease with a period of 11 years The solar cycle is caused by changes in the Sun's magnetic field.The escape velocity from any astronomical object can be calculated as , where G is the gravitational constant found in the textbook. Using the data in Appendix E, calculate the escape velocity from the photosphere of the Sun in km/s