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Vikentia [17]
3 years ago
10

Can you please answer the a and the b?

Physics
1 answer:
Vika [28.1K]3 years ago
8 0

Answer:

a) Epot = 17658 [J]

b) v = 76.72 [m/s]

Explanation:

Potential energy is defined as the product of mass by gravity by height.

E_{pot}=m*g*h\\

where:

Epot = potential energy [J]

m = mass = 6 [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 300 [m]

Now replacing:

E_{pot}=6*9.81*300\\E_{pot} = 17658 [J]

b)

The energy is conserved, that is, the potential energy is converted into kinetic energy as the car descends.

E_{k}=\frac{1}{2} *m*v^{2}

where:

v = velocity = 2 [m/s]

17658 = \frac{1}{2} *6*v^{2} \\v=\sqrt{5886}\\v=76.72 [m/s]

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Answer:

a.) The main scale reading is 10.2cm

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d.)  10.31 cm

e.)  10.24 cm  

Explanation:

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a.) The main scale reading is 10.2 cm

The reading before the vernier scale

b.) Division 7 = 0.07

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e.)  If the instrument has a negative zero error of 3 division

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4 years ago
A variable that should not change throughout the experiment is a(n):
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4 years ago
Assume a reaction takes 7.5 moles of anhydrous calcium chloride and energy transfer occurs, which we record as 21.2 joules of en
OLga [1]

Answer: 2.83 J/mol

Explanation:

Heat of solution, sometimes interchangeably called enthalpy of solution, is said to be the energy released or absorbed when the solute dissolves in the solvent. A solute is that which can dissolve in a solvent, to form a solution

Given

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Heat of solution = 2.83 J/mol

8 0
3 years ago
Read 2 more answers
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