Answer:
51520J
Explanation:
The energy added to the piece of glass is also called heat needed to increase its temperature from 10°C to 50°C and it depends on the mass, specific heat capacity and the change in temperature.
Q=m.c.ΔT
Q=(2kg).(644J/(kg°C)).((50°C)-(10°C))
Q=51520J
Answer:
Truck= 6.25 m/s
Car= 21.7 m/s
Explanation:
For elastic collision, the truck's final velocity is given by
The car's final velocity is given by
Where m and u denote masses and velocity respectively, subscripts 1 and 2 denote truck and car respectively.
Substituting 1720 Kg for mass of truck, 732 for mass of car and initial velocity as 15.5 m/s
Therefore, the final velocity of truck is 6.25 m/s while the car's final velocity is 21.7 m/s
Answer:
The correct answer is B. You would not have to travel far to see another total eclipse .
Explanation:
it is said that the way to predict or know beforehand if there is a lunar or solar eclipse is just to know the what is called the saros which are periods of exactly 223 synodic months and the eclipses are repeated or occurred in the same location every 3 Saros cycles.
Explanation:
Remember that power is defined as how much Work is done per unit of time.
Work is defined as the amount of force applied across a certain distance.
Since in both cases of climbing the ladder (on Earth and the moon), Luke coveres the same amount of <em>distance </em>in the same amount of <em>time</em>, we are only left with one difference between the two cases - gravity.
If you were to carry your backpack on the moon with the same load of text books, it would take less force to pick it up on the moon. Therefore, Luke expends less effort on the environment with less gravity - the moon.
To find the difference factor - you would want to divid the gravitational contants between earth and the moon.
Answer:
lifting a bag of groceries.
work is force by distance, if there is no movement there is no work done