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Arturiano [62]
3 years ago
10

Dora runs one lap around the track, finishing where she started. Clark runs a

Physics
1 answer:
Sonja [21]3 years ago
3 0

Answer:

See the answer below

Explanation:

Dora ran a complete lap around the track, including the straight side of the track; while Clark only ran a 100-meter along the straight side of the track.

<em>Hence, </em><em>Dora</em><em> must have traveled a greater distance.</em>

Dora finished the race where she started it, her change in position or displacement is zero. Clark finished the race at a different point from their starting position.

<em>Hence, </em><em>Clark</em><em> a greater change in position than Dora.</em>

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Sedaia [141]

Answer:

V = 20.5 m/s

Explanation:

Given,

The mass of the cart, m = 6 Kg

The initial speed of the cart, u = 4 m/s

The acceleration of the cart, a = 0.5 m/s²

The time interval of the cart, t = 30 s

The final velocity of the cart is given by the first equation of motion

                              v = u + at

                                  = 4 + (0.5 x 30)

                                = 19 m/s

Hence the final velocity of cart at 30 seconds is, v = 19 m/s

The speed of the cart at the end of  3 seconds

                                    V = 19 + (0.5 x 3)

                                       = 20.5 m/s

Hence, the final velocity of the cart at the end of this 3.0 second interval is, V = 20.5 m/s

6 0
3 years ago
Which describes the movement of a fluid during convection?
VikaD [51]
The movement of a fluid during convection is a circular/oval motion since the fluid at the top sinks and the fluid at the bottom rises.

Hope this helps :)
3 0
4 years ago
A perpetual motion machine can never be built because it is not possible to eliminate
d1i1m1o1n [39]

Answer:

D. Friction

Explanation:

Friction is a force that opposes motion. So a perpetual motion machine can never be built because it is impossible to eliminate frictional force. It can only be reduced

8 0
3 years ago
You have two resistors with the same cross sectional area and resistivity. Resistor A has length L1 and resistor B has length L2
oee [108]

Answer:

Explanation:

Given

Resistor A has length L_1

and Resistor B has Length L_2

and Resistance is given by

R=\frac{\rho L}{A}

Considering \rhoand A to be constant thus

R_2>R_1 because L_2>L_1

(a)When they are connected in series

As the current in series is same and power is i^2R

therefore P_2>P_1 as R is greater for second resistor

(b)if they are connected in Parallel

In Parallel connection Voltage is same

P=\frac{V^2}{R}

resistance of 2 is greater than 1 thus Power delivered by 1 is greater than 2

8 0
3 years ago
Atoms involved in blank covalent bonds do not share their electrons equally
just olya [345]
Atoms involved in (polar) covalent bonds do not share their electrons equally.
6 0
3 years ago
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