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nevsk [136]
3 years ago
9

A 50 kg bear climbed on the tree branch 10 meters above the ground. If the bear descends to 5 meters above the ground, its poten

tial energy will be decreased by
A/ 4900 J
B/ 2450 J
C/ 2540 J
D/ 2500 J ​
Physics
1 answer:
Simora [160]3 years ago
6 0
<h3>Option A. 4900 J or joules</h3>
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Which type of electromagnetic radiation is responsible for the colors of<br> objects?
Svetllana [295]

Visible light or electromagnetic radiation within 400nm to 700nm is responsible for colour of the spectrum.

Explanation:

The electromagnetic spectrum contains radiations of varying wavelength. The radiations with the lowest energy are characterised by the longest wavelength.

Within this spectrum lies the visible light which enables us to see a different colour. The radiations within the range 400nm to 700nm are included in the visible spectrum.

While violet lies at the 400nm spectrum part red colour lies at 700nm part. As the wavelength of the radiation transverses between 400-700 nm, the colour of the object changes accordingly.

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3 years ago
The earth's radius is 6.37×10^6m; it rotates once every 24 hours. with the angular speed of 7.3 x 10^-5 what is the speed of a p
alexira [117]
The speed of the earth's surface located at 2/3 of the length of the arc between the pole which measure from the equator is 232.5 m/s.

Solution:
So the givens are, earth's radius = 6.37X10^6m, and the angular distance from the pole is 90 degrees. So 60 degrees is the 2/3.

r = 6.37x10^6 * cos(60) = 3.185x10^6m
since v = wr
v = 7.3x10^-5 * 3.185x10^6

v - 232.5 m/s
6 0
3 years ago
The picture on the left represents the reactants in the equation and the picture on the right represents the products. Does this
V125BC [204]
The answer is , n<span>o, because there are not the same number of molecules in the product side as in the reactant side. 

The law of conservation of matter says that the system remains the same throughout. The number of atoms, mass and energy must stay constant. If you look at your figure there are more white atoms on the left side than the right, this means that there was a loss and this should not be the case. 
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7 0
3 years ago
If you are driving 120 km/h along a straight road and you look to the side for 2.0 s , how far do you travel during this inatten
Delicious77 [7]
120 km / 60 min

2 km / 1 min

1 km / 30 sec

0.5 km / 15 sec

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3 years ago
Fill in the blanks about Newton’s First Law of Motion:
Afina-wow [57]

Objects want to continue doing what they’re doing because they are “lazy.” This is called law of inertia.

Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that state unless it is being acted upon by an external force. This law is also called the law of inertia because it depends on mass.

<em>From the given question, we can </em><em>fill gaps </em><em>as follows;</em>

Objects want to continue doing what they’re doing because they are “lazy.” This is called law of inertia.

Learn more about Newton's first law of motion here: brainly.com/question/10454047

6 0
3 years ago
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