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mars1129 [50]
3 years ago
9

Which of the following can cause skin cancer and which can't?

Physics
1 answer:
Basile [38]3 years ago
6 0
Sun
Tanning bed
Fluorescent light bulbs
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If the only force exerted on a star far from the center of the Galaxy (r = 7.40 ✕ 1020 m) is the gravitational force exerted by
lina2011 [118]

Answer:

The value is  v = 1.309*10^{5}\ m/s

Explanation:

The radius is r = 7.40 *10^{20} \  m

The mass of the ordinary matter is M_{rod} =  1.90 *10^{41}\  kg

Generally the speed of the star is mathematically represented as

         v = \sqrt{\frac{G * M}{r} }

Here G is the gravitational constant with a value

        G = 6.67384 * 10^{-11}

So

      v = \sqrt{\frac{6.67384 * 10^{-11} * 1.90 *10^{41}}{7.40 *10^{20}} }

=>    v = 1.309*10^{5}\ m/s

8 0
3 years ago
What is required for force to come into play​
White raven [17]

Answer:

An interaction of one object with another object results in a force between the two objects. Thus, at-least two objects must interact for a force to come into play.

7 0
3 years ago
Humans have 46 chromosomes. The cells created by meiosis have
alukav5142 [94]
Meiosis creates the gamete cells, because these cells are used in reproduction they only have 26 chromosomes two of these cells join together to make a full 46 chromosomes.

Hope this helps! :)
7 0
3 years ago
The magnitude of a vector can be different in different coordinate systems. The magnitude of a vector can be different in differ
Georgia [21]

Answer:

False.

Explanation:

We usually define vectors in terms of its magnitude and their orientation. Magnitude and direction does not vary with the change of a coordinate system as they are independent of coordinates and will remain the same. So it does not matter what your choice of a coordinate system is, it will not effect its direction and magnitude. However you can resolve the vector in to its components if you want.

4 0
3 years ago
How does current change for resistors in series? what is the equivalent resistance for resistors in series? answers?
ollegr [7]
The total resistance of electric circuit when resistors wired in a series is the sum of the individual resistance: each resistor in a series circuit has the same amount of current through and through it. Each resistor in a parallel circuit the same for voltage of the source applied to it.
when resistors are connected in parallel, the supply current is equal to the sum of the currents the metre resistor. In other words the currents in the branches of a parallel circuit add up to the supply current. When resistors are connected in parallel, they have the same potential difference is across them
8 0
4 years ago
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