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3 years ago

How are mass and brightness related? Daddies!

Physics

2 answers:

Delvig [45]3 years ago

5 0

Answer:

ftw

Explanation:

daddies?

maria [59]3 years ago

3 0

They aren’t. Brightness comes from the frequency of waves to your eye

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A boy walks from point C to point D which is 50 m apart. Then, he walks back to point C. what is his displacement of his whole j

enyata [817]

Answer: D. 0 m

Explanation:

Concept:

Here, we need to know the concept of displacement.

Displacement is defined to be the change in position of an object.

The difference between displacement and distance is the total movement of an object without any regard to direction, while displacement is the pure change of position.

If you are still confused, please refer to the attachment below for a graphical explanation.

Solve:

STEP ONE: the boy walks from point C to point D (a distance of 50 m)

C ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ D

50 m

STEP TWO: the boy walks from point D to point C (a distance of 50 m)

D ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ C

50 m

STEP THREE: find the displacement

The boy started with point C

The boy ended with point C

He did not change his position throughout the journey.

Therefore, his displacement is 0 m.

Hope this helps!! :)

Please let me know if you have any questions

4 0

3 years ago

A man can throw a ball a maximum horizontal distance of 56.1523 m. The acceleration of gravity is 9.8 m/s 2 . How far can he thr

IceJOKER [234]

Answer:

hmax= 28.2 m

Explanation:

Horizontal movement:

For the horizontal movement, as once released, nothing exerts any influence on the ball in the horizontal direction, it will keep moving at a constant speed, so, the equation for the horizontal displacement is as follows:

x = v₀*t = 56.1523 m

Vertical movement:

For the vertical movement, once thrown upward, the ball is under the sole influence of gravity, g, which causes the ball to accelerate downward, and which magnitude is 9.8 m/s².
At any time, applying the definition of acceleration, we can find the value of the velocity, as follows:

$vf = vo-g*t$

When the ball reaches to the maximum height, the ball will come momentarily at rest, so vf =0.
At this point, we can find the time at which the ball reached to its highest point, as follows:

$t = \frac{vo}{g}$

In the same way, we can find the maximum height reached by the ball, just replacing this value of time in the equation for the displacement, in the vertical direction, as follows:

$h = vo*t -\frac{1}{2} *g*t^{2}$

$hmax = vo*(\frac{vo}{g}) -\frac{1}{2} *g*(\frac{vo}{g} )^{2} =\frac{vo^{2}}{2*g}$

Now, returning to the horizontal movement, as the time must be the same for both movements, we can replace the value for time we have just found, in the equation for the horizontal displacement:

$x = v0x * t = v0x* \frac{voy}{g}$

But as we know that vox = voy, we can rewrite the equation above as follows:

$x = v0* t = v0* \frac{vo}{g} =\frac{vo^{2} }{g} = 56.1523 m$

We can solve for v₀, as follows:

$vo = \sqrt{56.1523 m *9.8 m/s2} =23.5 m/s$

Now, we can replace this value in the expression for hmax, as follows:
$hmax = \frac{vo^{2}}{2*g} =\frac{(23.5m/s)^{2}}{2*9.8 m/s2} = 28.2 m$

4 0

3 years ago

A 15.0 kg box is hung from the ceiling by one rope. What is the tension on the rope?

Kamila [148]

Tension = Mass * Gravity

Tension = 15 * 9.81 = 147.15

7 0

3 years ago

WHEN THE FORCE APPLIED ON AN ELASTIC OBJECT IS EQUAL AND OPPOSITE,THEN THIS FORCE MAY

jok3333 [9.3K]

Answer:

Elastic force

Explanation:

Elastic force occur when deformed or elastic object try to return to its original or natural length. When an elastic material is stretched, it resist it change in shape. The force act to return the elastic material to its original shape, it's then exert a counter force in opposit e direction.

4 0

3 years ago

How can I connect projectile motion into inclines. plsss give me ideas

Alenkasestr [34]

Answer:

Explanation:

Initial launch angle, θ

Initial velocity, u.

Time of flight, T.

Acceleration, a.

Horizontal velocity, vx.

Vertical velocity, vy.

Displacement, d.

Maximum height, H.

4 0

4 years ago