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3 years ago

True or False: The rate of nuclear decay depends on the temperature, pressure, and surface area of the isotope.

Physics

2 answers:

Liono4ka [1.6K]3 years ago

6 0

Answer:

False.

Hope this helps!

Natali5045456 [20]3 years ago

3 0

Answer:

The correct option is False

Explanation:

Temperature, pressure and surface area are factors that affect the rate of a chemical reaction and not a nuclear reaction. It should be noted that chemical reaction involves the electrons in the shell of an atom while nuclear reaction involves the unstable nucleus of a radioactive isotope. Thus, temperature, pressure and surface area do not affect the unstable nucleus during radioactive decay/emission.

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A 5 kg block is being pushed horizontally across a level surface at a constant velocity. What is the magnitude of the Normal for

luda_lava [24]

Answer:

50 N.

Explanation:

On top of a horizontal surface, the normal force acting on an object is equivalent to the force of gravity acting on the object. That is:

$\displaystyle \begin{aligned} F_N = F_g & = ma \\ & = mg\end{aligned}$

The mass of the block is 5 kg and the given force due to gravity is 10 N/kg. Substitute and evaluate:

$\displaystyle F_N = F_g = (5\text{ kg})(10 \text{ N/kg}) = 50 \text{ N}$

In conclusion, the normal force acting on the block is 50 N.

5 0

2 years ago

A boulder of mass 2000. kg breaks loose of a mountainside and plunges 200. m straight down into a lake at a temperature of 5.00◦

natka813 [3]

Answer:

DS = 13865.7[J/K]

Explanation:

We can calculate the energy of the rock, like the potential energy relative to the lake level. Which can be calculated by means of the following expression of the potential energy:

$E_{p}=m*g*h\\\\where:\\m = mass = 2000[kg]\\h = elevation = 200 [m]\\g = gravity = 9.81[m/s^2]$

Therefore:

$E_{p}=2000*9.81*200\\E_{p}=3924000 [J]\\$

This energy is transformed into thermal energy.

we shall remember that isothermal heat transfer processes are internally reversible, so the entropy change of a system during one of these processes can be determined, by the following expression.

$DS=\frac{Q}{T}\\ where:\\DS = entropy change [J/K]\\Q = Heat transfer [J]\\T = temperature [K]$

T = 5 + 278 = 283[K]

DS = 3924000 / 283

DS = 13865.7[J/K]

5 0

3 years ago

Which phrase best describes the side of the moon that faces Earth?

Artemon [7]

Answer:

I dont see any phrases to go with the answer was there any?

Explanation:

6 0

3 years ago

4. How does density affect refraction of a lightwave?

Brums [2.3K]

optical density would increase the refraction angle going in to the material

there may be a relation between opt density and mass density ... kg/m^3

7 0

4 years ago

ASAP pls answer right and I will mark brainiest

Ronch [10]

1. D:Asteroids have geological activity
2.A:Short-period comets circle around the sun in 200 years or less and originate in the Kuiper Belt
3.D:All of the above
4.A:It’s gravity is too weak to clear it’s orbit
5.B:Ceres
6.C:Haumea
7.A:Is bigger than Pluto

I hope this helps

6 0

3 years ago