Yes, the goalkeeper can move his wrist after the impact of the ball. While the impact may cause some discomfort or temporary pain, it is unlikely to completely restrict the goalkeeper's ability to move his wrist. However, if the goalkeeper experiences severe pain or swelling, it is advisable to seek medical attention to rule out any serious injury. **

The United Kingdom is still technically united, as it consists of four constituent countries: England, Scotland, Wales, and Northern Ireland. However, there have been growing tensions and calls for independence in Scotland and Northern Ireland in recent years. The Brexit vote also highlighted divisions within the UK, with Scotland and Northern Ireland voting to remain in the EU while England and Wales voted to leave. The issue of unity within the UK remains a topic of debate and concern. **

The reaction energy is smaller than the reaction enthalpy when the reaction involves a change in volume. This is because the reaction enthalpy takes into account the change in heat energy of the system as well as the work done on the surroundings, while the reaction energy only considers the heat energy change. Therefore, if the reaction involves expansion or compression of gases, the work done on the surroundings will affect the reaction enthalpy, making it larger than the reaction energy. **

Reaction energy and reaction enthalpy both refer to the energy changes that occur during a chemical reaction. However, the key difference between the two is that reaction energy is a broader term that encompasses all forms of energy changes, including potential energy, kinetic energy, and thermal energy. On the other hand, reaction enthalpy specifically refers to the heat energy change that occurs during a reaction at constant pressure. In other words, reaction enthalpy is a specific type of reaction energy that focuses on the heat exchange between the system and its surroundings. **

The reaction energy is smaller than the reaction heat because the reaction energy only accounts for the change in internal energy of the system, while the reaction heat includes the change in internal energy as well as the work done by or on the system. The reaction heat takes into account any work done against external pressure, such as expansion or compression of gases, in addition to the change in internal energy. Therefore, the reaction heat will always be larger than the reaction energy due to the inclusion of work done in the overall energy change of the system. **

A United Nations subsidiary is an organization that operates under the umbrella of the United Nations but has a specific focus or mandate. These subsidiaries are established to address specific issues such as health, education, or human rights. They work in coordination with the United Nations to achieve common goals and objectives, while also having a degree of autonomy to carry out their specialized work. **

United Nations subsidiaries are specialized agencies, funds, and programs that operate under the umbrella of the United Nations to address specific issues such as health, education, and humanitarian assistance. These subsidiaries have their own governing bodies and budgets, but work in coordination with the UN to achieve common goals. Some well-known UN subsidiaries include UNICEF, the World Health Organization (WHO), and the World Food Programme (WFP). These entities play a crucial role in implementing UN initiatives and providing assistance to countries in need around the world. **

Yes, a reaction product of an exothermic reaction can potentially be converted back into the starting materials by an exothermic reaction. This would depend on the specific chemical reaction and the conditions under which it occurs. If the reverse reaction is also exothermic, it could potentially release enough energy to drive the reaction in the reverse direction. However, the feasibility of this process would also depend on factors such as the activation energy and the thermodynamic stability of the reactants and products. **