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S_A_V [24]
3 years ago
6

An object's velocity can be described by its speed and acceleration.

Physics
2 answers:
dezoksy [38]3 years ago
5 0
Hey there!

<span> An object's velocity can be described by its speed and acceleration.

This statement is true

Hope this helps
Have a great day (:
</span>
san4es73 [151]3 years ago
4 0
True! 

ve·loc·i·ty<span>vəˈläsədē/</span>noun<span>the speed of something in a given direction.
</span>
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A car is moving at a initial velocity of 20 meters per second accelerates at a rate of 1.5 meters per second squared for 4 secon
Brrunno [24]
Answered using calculus.
Antidifferentiated the acceleration to get velocity. Added variable c as we do not know if there was an extra number there yet.
Knowing that when time is 0, the velocity is 20, we can substitute those numbers into the equation and find that c = 20.
Now we have full velocity equation: v = 1.5t + 20
Now we substitute 4 into t to find out the velocity after 4 seconds. This gives us the final answer of 26m/s

5 0
3 years ago
Which is most important in the use of a camera photofl ash unit, the intensity of the light (the energy per unit area per unit t
maria [59]

Answer:

intensity of the light (the energy per unit area per unit time)

Explanation:

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5 0
3 years ago
ASAP
iris [78.8K]

Answer:

A) Energy is dissipated into heat and sound energy due to Friction

B) The energy goes into heat and sound energy due to friction again, otherwise the cart would accelerate due to an unbalanced force. Therefore, we know there's friction, and the friction causes energy loss.

5 0
2 years ago
A sound source emits 20.0 W of acoustical power spread equally in all directions. The threshold of hearing is 1.0 × 10-12 W/m2.
ahrayia [7]

Answer:

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Explanation:

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I=\frac{20.0}{4\pi(30.0)^2}=0.0018 W/m^2

Intensity in decibels:

I(dB)=10log\frac{I}{I_o}\\=10log\frac{0.0018}{10^{-12}}=92.5 dB

7 0
3 years ago
Calculate kinetic energy in joules of 1500 kg car moving 29m/s
Anon25 [30]
Kinetic\  energy=\frac{1}{2}mass*velocity^2\\\\&#10;Kinetic energy=\frac{1}{2}*1500*29^2\\\\ Kinetic \ energy=750*841=630750J\\\\&#10;Kinetic \ energy\  is\  equal\  to\  630750\ Jules.
8 0
3 years ago
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