2 years ago

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Physics

1 answer:

Svet_ta [14]2 years ago

8 0

U hi why exactly are you trying to do

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Change the speed 36km in one hour

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22.37 miles per hour

:) please give me brainliest

Explanation:

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Oven mitts reduce which type of thermal energy transfer when you take a hot

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A) Conduction

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The mitt keeps the heat from reaching your hand through conduction

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A rope can withstand a maximum tension of 75 N before snapping . What maximum speed can you spin a 6.0 kg rock in a vertical cir

butalik [34]

Answer:

The maximum speed of the stone without breaking the rope is 4.33 m/s.

Explanation:

Given;

maximum tension the rope can withstand, T = 75 N

mass of the rock, m = 6 kg

radius of the circle, r = 1.5 m

As the stone spin in a vertical circle, it performs circular motion with centripetal acceleration directed inwards. The maximum centripetal force during this motion will be equal to maximum tension on the rope.

$F_c,_m_a_x = T = \frac{MV_m_a_x^{2} }{r}\\\\V_m_a_x^{2} = \frac{Tr}{M}\\\\V_m_a_x = \sqrt{\frac{75*1.5}{6}}\\\\V_m_a_x = 4.33 \ m/s$

Therefore, the maximum speed of the stone without breaking the rope is 4.33 m/s.

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An object possessing an excess of 6.0x10^6 electrons has a net charge of

guajiro [1.7K]

A single electron has a charge of
$e=-1.6 \cdot 10^{19}C$
Therefore, if we have an excess of $N=6.0\cdot10^6$ electrons, the total net charge will be the product between the charge of a single electron and the total number of electrons in excess:
$Q=Ne=(6.0\cdot10^6)(-1.6 \cdot 10^{-19}C)=9.6 \cdot 10^{-13}C$

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3 years ago