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3 years ago

Fluency means that

Physics

2 answers:

algol [13]3 years ago

8 0

a. you speak clearly and well

dalvyx [7]3 years ago

6 0

Answer:

a. you speak clearly and well

Explanation:

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If it takes 3.5 hours for the hogwarts express, moving at a speed of 120 mi/hr, to make it from platform 9 and 3/4 to hogwarts,

jeka94

Answer:

Given:

Time taken: 3.5 hrs

Speed: 120mi/HR

Now we know that

distance = speed x time

Substituting the given values in the above formula we get

Distance= 120mi/hr x 3 hrs

Distance = 360 mi= 579.36 Km

Explanation:

7 0

3 years ago

An object is thrown upward from the top of a 160 foot building with an initial velocity of 48 feet per second. The height h of t

inn [45]

Answer:

$t=5s$

Explanation:

From free falling objects we know that height is equal to:

$h=h_{o}+v_{oy}t+\frac{1}{2}gt^{2}$

From the exercise we know that

$h_{o}=160ft\\v_{oy}=48ft/s\\g=-32 ft/s^{2}$

Being said that, we can calculate how long would it take to the object to hit the ground knowing that the height at that point is 0

$0=160ft+(48ft/s)t-\frac{1}{2}(32ft/s^2)t^2$

Solving the quadratic formula we got that

$t=\frac{-b±\sqrt{b^{2}-4ac}}{2a}$

$a=-16\\b=48\\c=160$

$t=-2s$ or $t=5s$

Since time can not be negative the logical answer is <u><em>t=5s</em></u>

So, the object hit the ground at 5s

6 0

3 years ago

Read 2 more answers

Need help on this quick

Vlad1618 [11]

Answer:

the first one

Explanation:

because the same side magnates repel each other

5 0

4 years ago

Read 2 more answers

A member of the Penn State Women's Basketball team performs a jumping movement simulating that used in a jump shot. The time fro

Shkiper50 [21]

A) Starting from rest, we have the entire cycle determined by 0.8s.

If we assume a constant movement, half of that time is when it reaches the highest point, that is, in 0.4s.

The distance as a function of speed and acceleration is given by,

$d=v_it+\frac{1}{2}at^2$

At the initial point the speed is zero and the acceleration is equivalent to gravity.

$d= 0+ \frac{1}{2}9.8*0.4^2$

$d=0.784m$

B) When returning to the ground, the final speed is zero. Therefore, the equation that relates velocity to acceleration is given by,

$V_f = V_i+at$

$0 = V_i -9.8(0.4)$

$V_i = 3.92m/s$

5 0

4 years ago

What is the mass of the 40 kg object on the moon?

SIZIF [17.4K]

Answer:

6.64 Newtons

On the moon that 40 kg child would have a weight of 6.64 Newtons (kg multiplied by gravity) because the moon's gravity is 1/6th of the Earth's gravity. Your mass on any planet on the solar system (Jupiter, Venus, Earth, or anywhere else) is the same because the amount of matter in you does not change.

Explanation:

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3 years ago