Answer:
Explanation:
The heat required to change the temperature of steam from 125.5 °C to 100 °C is:
The heat required to change the steam at 100°C to water at 100°C is;
The heat required to change the temperature from 100°C to 0°C is
The heat required to change the water at 0°C to ice at 0°C is:
The heat required to change the temperature of ice from 0°Cto -19.5°C is:
The total heat required to change the steam into ice is:
b)
The time taken to convert steam from 125 °C to 100°C is:
The time taken to convert steam at 100°C to water at 100°C is:
The time taken to convert water to 100° C to 0° C is:
The time taken to convert water at 0° to ice at 0° C is :
The time taken to convert ice from 0° C to -19.5° C is:
Answer:
F = 39.2 N
Explanation:
Since, the object is in uniform motion. Therefore, the frictional force on object will be:
Frictional Force = μk N = μk mg
where,
μk = coefficient of kinetic friction = 0.2
m = mass of crate = 10 kg
g = 9.8 m/s²
Therefore,
Frictional Force = (0.2)(10 kg)(9.8 m/s²)
Frictional Force = 19.6 N
The horizontal component of force must be equal to this frictional force to continue the uniform motion:
F Sin 30° = 19.6 N
F = 19.6 N/Sin 30°
<u>F = 39.2 N</u>
The best statement would be number 3. Sound waves move perpendicular to the medium particles.
Answer:
Spirit of St. Louis
Explanation:
Charles Lindbergh was known as a prolific aviator during the early twentieth century. He is well known for the flight he took from Long Island, New York, to Paris, France. It was a continuous flight across the Atlantic Ocean.
The plane he used was the Spirit of St. Louis which took more than 33 hours to complete the journey. It was the first successful flight of this kind. The airplane flew from Long Island on May 20 and landed in Paris on May 21.
