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Fittoniya [83]
3 years ago
7

A pumpkin is dropped after 5 seconds its velocity is 47m/s what is its acceleration

Physics
2 answers:
ANEK [815]3 years ago
8 0
 9.81m/s Hope i helped
Vesna [10]3 years ago
6 0

Answer:

Acceleration, a=9.4\ m/s^2

Explanation:

It is given that,

Initial speed of the pumpkin, u = 0

Final speed of the pumpkin, v = 47 m/s

Time taken, t = 5 seconds

Acceleration of an object is given by :

a=\dfrac{v-u}{t}

a=\dfrac{47\ m/s}{5\ s}

a=9.4\ m/s^2

So, the acceleration of the pumpkin is 9.4\ m/s^2. Hence, this is the required solution.

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A gas is compressed at constant temperature from a volume of 5.68 L to a volume of 2.35 L by an external pressure of 732 torr. C
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Answer: The work done in J is 324

Explanation:

To calculate the amount of work done for an isothermal process is given by the equation:

W=-P\Delta V=-P(V_2-V_1)

W = amount of work done = ?

P = pressure = 732 torr = 0.96 atm    (760torr =1atm)

V_1 = initial volume = 5.68 L

V_2 = final volume = 2.35  L

Putting values in above equation, we get:

W=-0.96atm\times (2.35-5.68)L=3.20L.atm

To convert this into joules, we use the conversion factor:

1L.atm=101.33J

So, 3.20L.atm=3.20\times 101.3=324J

The positive sign indicates the work is done on the system

Hence, the work done for the given process is 324 J

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3 years ago
Suppose there are 100,000 atoms of a radioactive substance that has a ½ life of 10 minutes. How many atoms will remain after 40
dezoksy [38]

Answer:

c. 12,500

Explanation:

Original number of atoms = 100,000 atoms

Half- life  = 10min

Unknown:

The number of atoms that will remain after 10min  = ?

Solution:

The half - life is the time taken for half of a radioactive substance to decay by half.

    Time taken        Number of atom   half life

           10min             100000                   _

           20min             50000                    1

           30min             25000                    2

           40min              12500                     3

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3 years ago
A block with a mass of 0.28 kg is attached to a horizontal spring. The block is pulled back from its equilibrium position until
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Answer:

Explanation:

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Putting the values

1.2=\sqrt{\frac{k}{.28} }

k = .4032 N/m

F= k x

where F is force , k is force constant and x is extension

Putting the given values

1 = .4032 x

x = 2.48 m

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What was Sylvester James Gates biggest discovery
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Sylvester James Gates' biggest discovery was the string theory which involves computer coding. I hope this answer helped.
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