3 years ago

The graph shows two runners participating in a race.

Physics

2 answers:

Tatiana [17]3 years ago

8 0

Answer:

the guy above is correct its a

Explanation: just took the test

Olin [163]3 years ago

6 0

Answer:

'Daniela had a 5-meter head start, and Leonard caught up to her at 25 meters.'

Explanation:

hope that helps :)

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What happens to the orbit time as the distance increases.

Maslowich

The orbital period increases if the orbital distance is increased.

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3 years ago

The combustion of 1.631 g of sucrose, C12H22O11(s) , in a bomb calorimeter with a heat capacity of 5.30 kJ/°C results in an incr

VLD [36.1K]

Answer:

= - 26.31 kJ

Explanation:

we know that number of moles is calculated as

$Moles of C_{12}H_{22}O_{11} = \frac{mass}{molecular\ weight}$

$= \frac{(1.631 g)}{(342.29 g/mol)}$

= 0.00476 mol

Heat absorbed by calorimeter $= heat\ capacity \times temperature\ rise$

$= 5.30 kJ/°C x (27.75 - 22.68)°C$

= 26.87 kJ

Enthalpy of combustion

$\Delta Hc = \frac{- 26.87}{0.00486}$

= - 55290.12 kJ/mol

Negative sign shows that the heat is released

The balanced reaction

$C_{12}H_{22} O_{11}(s) + 12 O_2(g) = 12 CO_2(g) + 11 H_2O(l)$

ΔHc = ΔU + Δng (RT)

-55290.12 = ΔU + (12 - 12) *(RT)

$\Delta U = - 55290.12 kJ/mol \times 0.00476 mol$

= - 26.31 kJ

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3 years ago

______ is the ability to cause changes in matter.

My name is Ann [436]

Answer:

Explanation:

Energy is defined as the ability to cause changes in matter. The energy of moving matter is called kinetic energy.

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3 years ago

A hummingbird flies 1.2 m along a straight path at a height of 3.4 m above the ground. Upon spotting a flower below, the humming

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Answer:1.84

Explanation:

Given

Humming bird travels 1.2 m along a straight line at height of 3.4 m

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displacement $=\sqrt{1.2^2+1.4^2}$

displacement $=\sqrt{3.4}$

=1.84

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3 years ago

Please help me! :( <br> I will give brainliest

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