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cluponka [151]
3 years ago
9

A) Jaką długość powinien mieć mieć bok kwadratu , aby pole tego kwadratu było równe polu prostokątu o wymiarach 3cm x 4

cm ? Wynik podaj z dokładnością do 1mm.
b) Jaką długość ma krawędź sześcianu , którego ma objętość jest równa objętości prostopadłościanu o wymiarach 2cm x 4cm x 5 cm ?Wynik podaj z dokładnością do 1mm.
Physics
1 answer:
seropon [69]3 years ago
5 0
What do you even mean..
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Fifteen joules of heat are added to a cylinder with a piston. The system uses 7 joules of energy to raise the piston upward. By
r-ruslan [8.4K]

Answer:

8 J

Explanation:

Heat = work + change in internal energy

Q = W + ΔU

15 J = 7 J + ΔU

ΔU = 8 J

4 0
2 years ago
After a nucleus with 85 protons undergoes alpha decay, it has<br><br> ? protons.
Valentin [98]

Answer:

After a nucleus with 85 protons undergoes alpha decay, it has  83 protons.

Explanation:

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The current proton number after decay is

85 -2 = 83

After a nucleus with 85 protons undergoes alpha decay, it has  83 protons.

5 0
3 years ago
A karate student trying to break bricks in half is wondering if it would be more effective to strike these bricks and stop her h
Dima020 [189]

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7 0
2 years ago
You are sitting in a chair on an elavator. The elavator accelerates downward, you and the chair land on the cround with the chai
ExtremeBDS [4]

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7 0
3 years ago
A positive and a negative charge, each with a magnitude of 1.41 x 10^-5 C, are separated by a distance of 0.44 m. Find the force
vredina [299]
For this question, we use the Coulumb's law to calculate the force on each particles. In this law, force between point charges are said to be proportional to product of each charge and is  indirectly proportional to the distance of both charges. We do as follows:

F= kq(1)q(2)/d^2 
  = (9x10^9).(1.41 x 10^-5 C).(-<span>1.41 x 10^-5 C</span><span>)/.44^2 
</span>  = 4.067 N


6 0
3 years ago
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