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2 years ago

How do you determine the speed or velocity of an object using a distance vs. time graph

1 answer:

Taya2010 [7]2 years ago

4 0

The speed of an object can be determined from the distance vs time graph.

You know that speed = distance/time

in the graph, distance/time = slope of the curve.

So SPEED IS GIVEN BY THE SLOPE of the curve in the graph.

● If the distance vs time curve is a straight line, parallel to time axis(x-axis), slope is 0. That means speed is 0. So the object is at rest.

● If the distance vs time curve is a straight line, with some non-zero slope; That means speed is nonzero and constant. So the object is in uniform motion.

● If the distance vs time curve is a curved, the slope is changing. That means speed is changing. So the object is in an accelerated motion.

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Find the resistance of a stereo: current is 7 A voltage is 49 V.

pochemuha

Answer:

R = 7 [amp]

Explanation:

To solve this problem we must use ohm's law which tells us that the voltage is equal to the product of the current by the resistance. In this way, we have the following equation.

V = I*R

where:

V = voltage = 49 [V] (units of volts)

I = current = 7 [amp] (amperes)

R = resistance [ohms]

Now clearing R.

R =V/I

R = 49/7

R = 7 [amp]

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3 years ago

What is the Orbital Notation for Radon

balu736 [363]

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

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2 years ago

What organelles is found in most plant cells, but is never found in animal cells?

dolphi86 [110]

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2 years ago

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The highest barrier that a projectile can clear is 12.2 m, when the projectile is launched at an angle of 13.0 ° above the horiz

Orlov [11]

consider the motion in vertical direction

v = initial velocity in the vertical direction = ?

v' = final velocity in the vertical direction at the highest point = 0 m/s

a = acceleration due to gravity = - 9.8 m/s²

h = maximum height = 12.2 m

Using the kinematics equation

v'² = v² + 2 a h

0² = v² + 2 (- 9.8) (12.2)

v = 15.5 m/s

let assume that velocity of launch be v₀

θ = angle of launch = 13

vertical component of the velocity of launch is given as

v = v₀ Sinθ

15.5 = v₀ Sin13

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2 years ago

You connect five identical resistors in series to a battery whose EMF is 12.0 V and whose internal resistance is negligible. You

avanturin [10]

Answer:

The resistance of each resistor is 2.5 Ω

The potential difference across each resistor is 2.4 V.

Explanation:

By Ohm's law,

V = IR

where V is the potential difference or voltage across an element, I is the current flowing through it and R is its effective resistance.

For the group of five resistors, let their combined resistance be R.

Then

(12.0 V) = (0.961 A)(R)

$R = \dfrac{12}{0.961}\,\Omega$

Because they are in series, R is the arithmetic sum of their individual resistances. Because they are all identical, the resistance of each resistor is

$= \dfrac{12}{5\times0.961}\,\Omega = 2.5\,\Omega$

Also, because they are in series and are equal, the EMF is distributed across them equally. Therefore, the potential difference across each resistor is

$\dfrac{12.0\text{ V}}{5} = 2.40\text{ V}$

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3 years ago

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