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3 years ago

The process of a nucleus giving off radioactive particles to become more stable is called

1 answer:

8 0

Answer: The process in which the nuclei of unstable atoms can become more stable by emitting particles and/or electromagnetic radiation is called radioactive decay.

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What did jesseca kusher make

fiasKO [112]

I have no idea... Sorry :D

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3 years ago

Sound waves travel faster in : Group of answer choices

ira [324]

Answer:

its a solid it travals fasters in a solid

Explanation:

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3 years ago

A turntable has an angular velocity of 3.5 rad/s. A dust bunny is on the disk of the turntable at a distance of 0.2m from the ce

diamong [38]

Answer:

E. 0.25

Explanation:

Given that

Angular speed ω = 3.5 rad/s

Distance ,r= 0.2 m

Lets take mass of dust bunny = m

We know that

Radial force F = m ω² r

The friction force on the dust bunny Fr

Fr= μ m g

To getting slung off dust bunny from disk

m ω² r = μ m g

ω² r = μ g

3.5² x 0.2 = μ x 10 ( take g =10 m/s²)

μ = 0.245

μ = 0.25

Therefore answer is E

E. 0.25

3 0

3 years ago

Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her se

lions [1.4K]

Answer:

-2200 N

Explanation:

Here we can use the impulse theorem, which states that the impulse exerted on Sarah (product of force and duration of collision) is equal to Sarah's change in momentum:

$I=\Delta p\\F \Delta t = m \Delta v$

where

F is the average force

$\Delta t$ is the duration of the collision

m is the mass

$\Delta v$ is the change in velocity

In this problem:

m = 55 kg

$\Delta v = 0-20 = -20 m/s$

$\Delta t = 0.5 s$

Solving the formula, we find the force exerted by the seatbelt on Sarah:

$F=\frac{m\Delta v}{\Delta t}=\frac{(55)(-20)}{0.5}=-2200 N$

And the negative sign means the direction is opposite to that of Sarah's initial motion.

6 0

3 years ago

What are tectonic plates, and which of Earht's layers are they composed of?

motikmotik

The tectonic plates are made up of Earth's crust and the upper part of the mantle layer underneath. Together the crust and upper mantle are called the lithosphere. hope this helps :)

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3 years ago