Answer:
Food, wind, water.
Explanation:
This is supposed to be a personalized question so I answered with things that can make/give energy.
Answer: Our weight on moon is less than it would be on Earth due to a difference of the strength of gravity on the moon. The moon's gravitation force is determined by the mass and the size of the moon. ... This means that if you went to the moon you would weigh less, even though your mass stays the same!
HOPE THIS HELPS
This problem is asking for the required heat to change the temperature of 500 g of water by 50 °C. At the end, the result turns out to be 25,000 cal as shown below:
<h3>Calorimetry</h3>
In science, calorimetry is the process whereby objects lose or gain energy according to the decrease or increase of their temperature. Thus, for these problems, we need to use the following equation:
Where Q stands for the heat, m for the mass, C for the specific heat of the object and T for the temperature (final and initial). Thus, for this problem, since it is about water, one fixes its specific heat as 1 cal /(g-°C) in order to obtain the following:
Learn more about calorimetry: brainly.com/question/1407669
Answer: c) 42 N
Explanation:
M = 2.5 kg
L = 2.5 m
h = L(1 - sin 40 degrees)
Potential energy Mgh = MgL(1 - sin 40 degrees )
kinetic energy = MgL(1 - sin 40 degrees)
(1/2)Mv^2 = MgL(1 - sin 40 deg)
Mv^2 = 2MgL(1 - sin 40 deg)
Fc = Mv^2/L
Fc = 2Mg(1 - sin 40 deg)
= 2 x 2.5 x 9.8 x (1 - sin 40 deg)
Fc = 17.5 N
Let T = tension in the string.
T - Mg = Fc
T - 2.5 x 9.8 = 17.5
T - 24.5 = 17.5
T = 17.5 + 24.5
T = 42 N