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2 years ago

5. You require a high-current battery to start a large tractor. While shopping

Physics

1 answer:

Yakvenalex [24]2 years ago

3 0

Answer:

I have no clue sorry I wish I could help

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a 40 kilogramstudent runs up a staircase to a floor that is 5.0 meters higher than her starting point in 7.0 seconds. the studen

Wittaler [7]

When she reaches the top, she has more potential energy than she had at the bottom.

   Potential energy = (mass) x (gravity) x (height)

   = (40 kg) x (9.8 m/s²) x (5 m)

   = 1,960 more joules .

   Power = (energy) / (time)

   = (1,960 joules) / (7 seconds)

   = 280 watts

(about 0.375 horsepower)

3 0

2 years ago

What 2 things need to be known about an object in order to determine its kinetic energy?

NikAS [45]

I believe the answer is the mass of the object and the speed at which it is moving.

7 0

3 years ago

What do radio waves and microwaves have in common?

MAVERICK [17]

#3, they both come after infared and are not harmful to living cells.

6 0

3 years ago

Compute the kinetic energy of a proton (mass 1.67×10−27kg ) using both the nonrelativistic and relativistic expressions for spee

JulsSmile [24]

Answer:

The non-relativistic kinetic energy of a proton is $6.76\times10^{-12}\ J$

The relativistic kinetic energy of a proton is $7.25\times10^{-12}\ m/s$

Explanation:

Given that,

Mass of proton $m=1.67\times10^{-27}\ kg$

Speed $v= 9.00\times10^{7}\ m/s$

We need to calculate the kinetic energy for non relativistic

Using formula of kinetic energy

$K.E=\dfrac{1}{2}mv^2$

Put the value into the formula

$K.E=\dfrac{1}{2}\times1.67\times10^{-27}\times(9.00\times10^{7})^2$

$K.E=6.76\times10^{-12}\ J$

We need to calculate the kinetic energy for relativistic

Using formula of kinetic energy

$K.E=mc^2(\sqrt{(\dfrac{1}{1-\dfrac{v^2}{c^2}})}-1)$

$K.E=1.67\times10^{-27}\times(3\times10^{8})^{2}\cdot\left(\sqrt{\frac{1}{1-\frac{\left(9.00\times10^{7}\right)^{2}}{(3\times10^{8})^{2}}}}-1\right)$

$K.E=7.25\times10^{-12}\ m/s$

Hence, The non-relativistic kinetic energy of a proton is $6.76\times10^{-12}\ J$

The relativistic kinetic energy of a proton is $7.25\times10^{-12}\ m/s$

7 0

3 years ago

What is the difference between regional metamorphism and contact metamorphism?

-Dominant- [34]

Contact metamorphism is a type of metamorphism where rock minerals and texture are changed, mainly by heat, due to contact with magma. Regional metamorphism is a type of metamorphism where rock minerals and texture are changed by heat and pressure over a wide area or region.

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3 years ago