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Y_Kistochka [10]
3 years ago
5

What kind of energy is stored in a flashlight battery enabling it to function? electrical energy, chemical energy, mechanical en

ergy, or gravitational energy ? :/
Physics
2 answers:
worty [1.4K]3 years ago
7 0
Eletric energy is in a battery and makes the flashlight goes on
Lady bird [3.3K]3 years ago
3 0
Electrical Energy because the electrons in the battery travel from out one end of the battery through a circuit and back to the other end
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Which of the following is not a double-replacement?
zhannawk [14.2K]

Answer:

The correct answer is option D.

Explanation:

From the given options the reaction which is not a double replacement reaction is:

Zn (s) + 2HCl (aq)\rightarrow H_2 (g) + ZnCl_2 (s)

This because the above reaction is an example of single replacement reaction.

AB+C\rightarrow AC+B

Whereas;

Double replacement reaction is a type of chemical reaction in which exchange of ions among the reactants take place.

AB+CD\rightarrow AD+CB

6 0
3 years ago
A heavy, 6 m long uniform plank has a mass of 30 kg. It is positioned so that 4 m is supported on the deck of a ship and 2 m sti
Harman [31]

Answer:

about 1 meter

Explanation:

   

8 0
3 years ago
As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposit
Karolina [17]

Answer:

the force of the plow pulling backward on the tractor

Explanation:

7 0
3 years ago
A special rocket can produce 7.66 ✕ 10^5 N of instantaneous thrust with an exhaust speed of 3.05 ✕ 103 m/s in vacuum. What mass
adelina 88 [10]

The mass of fuel the engine burn each second to produce a thrust of 7.66×10⁵ N is 2.5×10² kg/s.

<h3 /><h3>What is mass?</h3>

Mass can be defined as the quantity of matter contained in a body. The S.I unit of mass is kilogram(kg)

To calculate the mass the engine burns each seconds, we use the formula below.

Formual:

  • M = T/v............. Equation

Where:

  • M = Mass per seconds of the rocket
  • T = Thrust
  • v = Velocity

From the question,

Given:

  • T = 7.66×10⁵ N
  • v = 3.05×10³ m/s

Substitute these values into equation 1

  • M = (7.66×10⁵)/(3.05×10³)
  • M = 2.5×10² kg/s

Hence, the mass of fuel burned in each second is 2.5×10² kg/s.

Learn more about mass here: brainly.com/question/25121535

#SPJ1

8 0
1 year ago
A 19 g bullet is fired into the bob of a ballistic pendulum of mass 1.3 kg. When the bob is at its maximum height, the strings m
katovenus [111]

Answer:

217.43298 m/s

Explanation:

m_1 = Mass of bullet = 19 g

m_2 = Mass of bob = 1.3 kg

L = Length of pendulum = 2.3 m

\theta = Angle of deflection = 60°

u = Velocity of bullet

Combined velocity of bullet and bob is given by

v^2-u^2=2as\\\Rightarrow v=\sqrt{2aL(1-cos\theta)+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times (1-cos60)+0^2}\\\Rightarrow v=3.13209\ m/s

As the momentum is conserved

m_1u=(m_1+m_2)v\\\Rightarrow u=\frac{(m_1+m_2)v}{m_1}\\\Rightarrow v=\frac{(0.019+1.3)\times 3.13209}{0.019}\\\Rightarrow v=217.43298\ m/s

The speed of the bullet is 217.43298 m/s

5 0
3 years ago
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