Answer: C. They are regions in which strong magnetic fields make it difficult for fresh supplies of hot, ionized gas to reach the photosphere
Explanation:
Sunspots appear dark because they are regions in which strong magnetic fields make it difficult for fresh supplies of hot, ionized gas to reach the photosphere.
Sunspots are typically cooler than their surroundings. For example, the temperature of a large sunspot can be about 4,000 Kelvin which is lower than the temperature of the photosphere around it which is about 5,800 Kelvin.
Answer:
kinetic energy
Explanation:
Kinetic energy is energy in motion
Answer:
It sticks to the wall due to electrostatics.
Explanation:
When pam rubs a balloon against his hair, and holds it up against the wall, he is basically adding a surplus of electrons which are negative charges to the surface of the balloon.
This motion would make the wall the more positively charged than the balloon. Therefore, when the two charges come in contact with each other, the balloon will stick to the wall because of the rule in electrostatics that opposite charges attract each other.
The first law of thermodynamics is the law of conservation of energy. It states that energy is always conserved. ... To keep a machine moving, the energy applied should stay with the machine without any losses. Because of this fact alone, it is impossible to build perpetual motion machines.
Answer:
Explanation:
The Law of Momentum Conservation for us has the equation
![[m_rv_r+m_gv_g]_b=[m_rv_r+m_gv_g]_a](https://tex.z-dn.net/?f=%5Bm_rv_r%2Bm_gv_g%5D_b%3D%5Bm_rv_r%2Bm_gv_g%5D_a)
and filling in:
![[(.50)(5.0)+(.50)(0)]=[(.50)(2.0)+(.50)v_g]](https://tex.z-dn.net/?f=%5B%28.50%29%285.0%29%2B%28.50%29%280%29%5D%3D%5B%28.50%29%282.0%29%2B%28.50%29v_g%5D)
and
2.5 = 1.0 + .50v and
1.5 = .50v so
v = 3 m/s
