A Hailstorm Causes an Average Pressure of 1 $\times$ 10^-3 Kg,have an Average Velocity of 10 M/s Perpendicular to the 200-M²

question 1

Multiple Choice

A hailstorm causes an average pressure of 1.4 N/m² on the 200-m² flat roof of a house.The hailstones,each of mass 7.0 $\times$ 10^-3 kg,have an average velocity of 10 m/s perpendicular to the roof and rebound after hitting the roof with the same speed.How many hailstones hit the roof each second?

• A)4000
• B)2000
• C)1000
• D)10
• E)800

---

Definitions:

Export

The process of sending goods or services to another country for sale or trade.

Act of State Doctrine

A principle that shields countries from being sued in foreign courts for actions taken within their own territories.

Judgment

A legal decision made by a court following a lawsuit.

State Government

The governing body of a state within a federated entity, such as the United States, which has its own separate powers and jurisdiction within its territory, following a constitution or laws specific to that state.