Answer:
A light emitting diode (a semiconductor diode which glows when voltage is applied.
Answer:
A) 50.0 g Al
Explanation:
We can calculate the temperature change of each substance by using the equation:
where
Q = 200.0 J is the heat provided to the substance
m is the mass of the substance
is the specific heat of the substance
Let's apply the formula for each substance:
A) m = 50.0 g, Cs = 0.903 J/g°C
B) m = 50.0 g, Cs = 0.385 J/g°C
C) m = 25.0 g, Cs = 0.79 J/g°C
D) m = 25.0 g, Cs = 0.128 J/g°C
E) m = 25.0 g, Cs = 0.235 J/g°C
As we can see, substance A) (Aluminium) is the one that undergoes the smallest temperature change.
Answer:
(b) 1/sinƟ
Explanation:
A simple machine can be defined as a type of machine with no moving parts but can be used to perform work.
Basically, a simple machine allows for the transformation of energy into work. The six simple machines are; lever, wedge, pulley, screw, wheel and axle, and inclined plane.
Inclined plane is a simple machine set at an angle and then used to lift an object.
In Physics, the velocity ratio of a simple machine is calculated as a ratio of the distance moved by the effort to the vertical distance through which a load is raised.
Mathematically, the velocity ratio of an inclined plane of angle Ɵ, acting as a simple machine is given by the formula;
Velocity ratio (V.R) = 1/sinƟ
Basically, an increase in the angle of inclination (measured in degrees) of an inclined plane increases its velocity ratio.
Spring begins on September 1 and ends on November 30 in the Southern Hemisphere; summer begins on December 1 and ends on February 28 (February 29 in a Leap Year); fall (autumn) begins on March 1 and ends on May 31 in the Northern Hemisphere; and.
