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2 years ago

How many joules are there in 200kj

Physics

2 answers:

timurjin [86]2 years ago

5 0

Answer:

$2.00 * 10^5J$

Explanation:

Make use of your conversion factors:

$200KJ * \frac{1000J}{1kJ} = 200,000J = 2.00* 10 ^5J$

Or alternatively make use of your scientific notation. $kilo = 10^3$

Therefore $200kJ = 200*10^3J=2.0*10^2*10^3J = 2.0*10^5J$

Lesechka [4]2 years ago

4 0

Answer:

200,000 joules <3

Explanation:
just accept it

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A 3-kg ball is thrown with a speed of 8 m/s at an unknown angle above the horizontal. The ball attains a maximum height of 2.8 m

Alina [70]

Answer:

13.5 J

Explanation:

mass of ball, m = 3 kg

maximum height, h = 2.8 m

initial speed, u = 8 m/ s

Angle of projection, θ

use the formula of maximum height

$H = \frac{u^{2}Sin^{2}\theta }{2g}$

$2.8 = \frac{8^{2}Sin^{2}\theta }{2\times 9.8}$

Sin θ = 0.926

θ = 67.8°

The velocity at maximum height is u Cosθ = 8 Cos 67.8 = 3 m/s

So, kinetic energy at maximum height

$K=\frac{1}{2}mv^{2}$

K = 0.5 x 3 x 3 x 3

K = 13.5 J

8 0

4 years ago

What is dark energy?

olga2289 [7]

Explanation:

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6 0

3 years ago

While following the directions on a treasure map a pirate walks 37.0 m north and then turns and walks 8.5 m east what is the mag

kogti [31]

Answer: $38\ m$

Explanation:

For this exercise you can use the Pythagorean theorem to find the magnitude of the resultant displacement.

Then:

$d^2=\triangle x^2+\triangle y^2$

You can observe that the square of the displacement is equal to the sum of the square of the horizontal displacement and the square of the vertical displacement.

Since the pirate walks 37.0 meters north and then turns and walks 8.5 meters east:

$\triangle x=37.0\ m\\\triangle y=8.5\ m$