3 years ago

The half-life of argon-44 is 12 minutes. Suppose you start with 20 atoms of

Physics

2 answers:

garik1379 [7]3 years ago

4 0

Answer:

C. 10

Explanation:

ioda3 years ago

4 0

Answer:

answer is 10

Explanation:

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A 15.0-kg child descends a slide 2.40 m high and reaches the bottom with a speed of 1.10 m/s .

pickupchik [31]

The thermal energy that is generated due to friction is 344J.

<h3>What is the thermal energy?</h3>

Now we know that the total mechanical energy in the system is constant. The loss in energy is given by the loss in energy.

Thus, the kinetic energy is given as;

KE = 0.5 * mv^2 =0.5 * 15.0-kg * (1.10 m/s)^2 = 9.1 J

PE = mgh = 15.0-kg * 9.8 m/s^2 * 2.40 m = 352.8 J

The thermal energy is; 352.8 J - 9.1 J = 344J

Learn more about thermal energy due to friction:brainly.com/question/7207509

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2 years ago

10. Inertia causes your books on the car seat to continue moving forward even after you brake. TrueFalse 11. Tires with little o

Charra [1.4K]

10. True

11. True

12. True

13. False

14. False

Hope this helps!!

3 0

3 years ago

Pls answer it plssss

Sonbull [250]

Answer:

1.Stronger bones 2.Joint flexibility

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3 years ago

If two opposing forces are equal, then the net force is 0 N.<br><br> true or false?

Fofino [41]

Answer:

false

Explanation:

6 0

3 years ago

A cube-shaped piece of copper has sides of 4cm each and it's density is

iris [78.8K]

Answer:

$64 cm^3$

Explanation:

<u>Density </u>

The density of a substance is the mass per unit volume. The density varies with temperature and pressure.

The formula to calculate the density of a substance of mass (m) and volume (V) is:

$\displaystyle \rho=\frac{m}{V}$

We have a cube-shaped piece of copper of 4 cm of side length. The volume of the piece is:

$V=(4\ cm)^3=64\ cm^3$

Surprisingly, no other magnitude is required, thus the answer is:

$\mathbf{64 cm^3}$

5 0

3 years ago