Question

Name Kevin Jaro 11/22/19 FRIDAY Total Points: 5x2 - 10 1. What is centripetal force? A body of mass 2 moving in a circular path with a uniform speed 45m/s. If the radius of the circle is 5m, calculate the centripetal force acting on the body 2. What do you understand by escape velocity? Calculate the escape velocity of the earth if its radius is 6370km and 8-9.81m/s. 3. Define heat. What is its unit? Convert Scal to Joules 4. Convert: a. 50°C to OF; b. 25°Fto OC, c. 100'C to K d. 40K to 'c etc. 5. How much heat is required to increase the temperature of 40g water from 25°C to 100°C? Specific heat of water is 1 cal/g'c.

Answer 1

According the guideliness i did first three questions...

5 m 1) centripetal force - The face that is necessary to keep an object moring en a curred bath and that is directed inward toward the Center of rotation a string on the end of which a store is whirled about Enerty centripetal borce on the store. Fc = myr =) (2 kg) (45 m/s) - 810 N. I Fc=810N 2) Escape Velocity : - The minimum Velocity that a moving body (such as rocket) must have to escape from the gravitational field of a celestial body (such as the Earth) and move outward into space. Vescape – Qum - (2) (6.673 x 10 w. m / 19 ) (5,98x1027 kg) 6.38x100 m. Vescope = 11184 m/s =) 11.2 km/s. 3 Heat: - Heat is Energy in transfer to 8r. from a thermodynamic system, by mechanismy other than thermodynamic works transber of matter As a form of Energy heat has the whit Jowe (3) The standard wnit for the rate of heat transferred is the watt (W), defined as One Joule per second . Convent cal to Joule to multiply sal with 4:184 I cal & 5x 4.184 e 20.92 J