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Daniel [21]
4 years ago
5

How long will a radioactive isotope decay?

Physics
2 answers:
fiasKO [112]4 years ago
8 0

Answer:

c - until it becomes a different, stable element

Explanation:

found it somewhere else than brainly you're welcome :)

trasher [3.6K]4 years ago
7 0

Answer: c

Explanation:

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A circuit contains a 12 volt battery and two 3 ohm bulbs in series. Calculate the current
OLEGan [10]

If there are two bulbs in series, and each bulb has

                                                   resistance = 3 ohms,

then their total resistance in series is 6 ohms. 

When the series pair of bulbs is connected across the terminals
of the battery, the current through the circuit is

 Current = (voltage) / (resistance) 

               =  (12 volts) / (6 ohms)  =  2 amperes

5 0
4 years ago
A block of mass 5 kg is placed on a rough table having a coefficient of static friction μs = 0.2.What is the force required to m
just olya [345]

Answer:

<em>We need to (at least) apply a force of 9.8 N to move the block</em>

Explanation:

<u>Second Newton's Law</u>

If a net force F_n different from zero is applied to an object of mass m, then it will move at an acceleration a, given by

F_n=ma

If we apply a force F to an object placed on a rough surface, the only way to make it move is to beat the friction force  which is given by

F_r=\mu F_N

Where \mu is the static friction coefficient and F_N is the normal force exerted by the table to the object. Since there is no motion in the vertical direction the normal force equals the weight of the object:

F_N=mg=5\ kg\ 9.8\ m/s^2=49\ N

The friction force is

F_r=0.2 (49)=9.8\ N

Thus, we need to (at least) apply a force of 9.8 N to move the block

5 0
4 years ago
Redshift means stars and galaxies are emitting a color that is shifting toward the red end of the color spectrum. this indicates
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Increasing ; moving away

This indicates the light's wavelengths are (increasing) and the star or galaxy is (moving away.)
7 0
3 years ago
Read 2 more answers
An object is positively charged if it has more what​
kkurt [141]

Answer:

An Object is positively charged if it has more Positive Electrons in that object

8 0
4 years ago
Which of the following would be the SI unit to use in measuring the temperature of hot liquid
GREYUIT [131]

Answer:

Kelvin

Explanation:

The SI unit to use in measuring the temperature of hot liquid is kelvin (K)

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4 years ago
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