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3 years ago

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Electromagnetic waves differ from other types of waves because they are

1 answer:

nikklg [1K]3 years ago

8 0

I think it is D because u think of space and Electromagnetic Waves Travel Through Space Moving All Kinds of Particles From The Sun With It Which Creates The Northern and Southern Lights In The Poles :-)

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In her hand, a softball pitcher swings a ball of mass 0.245 kg around a vertical circular path of radius 59.8 cm before releasin

GuDViN [60]

Answer:

The velocity is $v_b = 20.17 \ m/s$

Explanation:

From the question we are told that

The mass of the ball is $m = 0.245 \ kg$

The radius is $r = 59.8 \ cm = 0.598 \ m$

The force is $F = 30.9 \ N$

The speed of the ball is $v = 16.0 \ m/s.$

Generally the kinetic energy at the top of the circle is mathematically represented as

$K_t = \frac{1}{2} * m * v^2$

=> $K_t = \frac{1}{2} * 0.245 * 16.0 ^2$

=> $K_t = 31.36 \ J$

Generally the work done by the force applied on the ball from the top to the bottom is mathematically represented as

$W = F * d$

Here d is the length of a semi - circular arc which is mathematically represented as

$d = \pi * r$

So

$W = 30.9 * 0.598$

$W = 18.48 \ J$

Generally the kinetic energy at the bottom is mathematically represented as

$K_b = \frac{1}{2} * m * v_b^2$

=> $K_b = \frac{1}{2} * 0.245 * v_b^2$

=> $K_b = 0.1225 * v_b^2$

From the law of energy conservation

$K_t + W =K_b$

=> $31.36+ 18.48 = 0.1225 * v_b^2$

=> $v_b = 20.17 \ m/s$

3 0

3 years ago

Why would a red apple appear black if you looked at it through a blue filter?

Grace [21]

<span>Because the reflected red light from the apple will not pass through the blue filter and since no light gets through it will appear black.</span>

4 0

3 years ago

H2+O2=H2O<br><br> need to balance the chemical equation

yuradex [85]

Answer:

2 1 2

Explanation:

5 0

3 years ago

Read 2 more answers

Suppose the electric field between two parallel plates kept constant but the distance between them is tripled. What happens to t

alukav5142 [94]

Answer:

The voltage increases by a factor of three.

Explanation:

7 0

3 years ago

Calculate the gravitational force between a 10 kg ball and 20 kg ball

elena-s [515]

Answer:

$5.34\cdot 10^{-10} N$

Explanation:

The gravitational force is an attractive force exerted between any objects with mass.

The magnitude of the gravitational force between two objects is given by:

$F=G\frac{m_1 m_2}{r^2}$

where

G is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between the two objects

In this problem, we have:

$m_1 = 10 kg$ is the mass of the 1st ball

$m_2 = 20 kg$ is the mass of the 2nd ball

r = 5 m is the separation

So, the gravitational force between them is

$F=(6.67\cdot 10^{-11})\frac{(10)(20)}{5^2}=5.34\cdot 10^{-10} N$

7 0

3 years ago