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3 years ago

what happens when an object speeds up,slows down, or changes direction A) velocity B) time C) deceleration D) acceleration

2 answers:

7 0

What happens when an object speeds up, slows down, or changes direction?

When divided by Δt, (vf - vi) is used to determine which characteristic?
Acceleration

What happens when a penny is dropped from a height of 20 meters?
The anwer is The force of gravity causes it to accelerate.

What happens when an object speeds up, slows down, or changes direction?
Acceleration

Speed in a specific direction
The answer is velocity

A decrease in velocity over time

Deceleration

A car travelling at a constant 50 miles per hour turns left on the interstate. What is happening here?

the answer is Acceleration because speed is constant, but direction is changing.

When the final velocity is less than the initial velocity, this is

Speed

Whether calculating speed or acceleration, this data is required. The Answer Is Time

Those are the correct answers for the test i hope u passed well i know your gonna pass cause they are the correvt answers please make me brainly

HACTEHA [7]3 years ago

3 0

Whenever the motion of an object changes . . . speeding up, or slowing down,
or changing direction . . . that change is called "acceleration". Acceleration is produced by force on the object.If there is no force on the object, then there is no acceleration. That means that
its motion doesn't change. The object remains in constant, uniform motion .
moving with steady speed, in a straight line.

No force is necessary to keep an object moving, only to change its motion.

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Number of representative particles in 3 moles Sn

AURORKA [14]

Answer:

18.066 × 10²³ particles

Explanation:

Given data:

Number of moles of Sn = 3 mol

Number of representative particles = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For 3 mole of Sn:

3 × 6.022 × 10²³ particles

18.066 × 10²³ particles

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3 years ago

How many moles of nitrogen are present at STP if the volume is 846L

Artyom0805 [142]

A mole of any gas occupied 22.4 L at STP. So, the number of moles of nitrogen gas at STP in 846 L would be 846/22.4 = 37.8 moles of nitrogen gas.

Alternatively, you can go the long route and use the ideal gas law to solve for the number of moles of nitrogen given STP conditions (273 K and 1.00 atm). From PV = nRT, we can get n = PV/RT. Plugging in our values, and using 0.08206 L•atm/K•mol as our gas constant, R, we get n = (1.00)(846)/(0.08206)(273) = 37.8 moles, which confirms our answer.

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Darina [25.2K]

Answer:

The answer is B

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Answer:

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3 years ago