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Phoenix [80]
2 years ago
9

7.

Physics
1 answer:
vodomira [7]2 years ago
8 0

Answer:

the true about n i b i n is they are Commissioner

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An ice cream truck is going 25m/s to the East. It accelerates to 45m/s in the same direction over 5s. What is its acceleration?
Naya [18.7K]

Hello!

We can use the kinematic equation:
a = \frac{v_f - v_i}{t}

a = acceleration (m/s²)

vf = final velocity (45 m/s)
vi = initial velocity (25 m/s)

t = time (5 sec)

Plug in the givens:
a = \frac{45-25}{5} = \frac{20}{5} = \boxed{4 m/s^2}

6 0
2 years ago
Part A By what distance do two objects carrying 1.0 C of charge each have to be separated before the electric force exerted on e
aalyn [17]

Answer:

Part A: <em>4.74×10⁴ m</em>

P<em>art </em>B<em>: </em>0.000211 C

Explanation:

Part A:

From coulombs law,

F  = kq²/r²........................ Equation 1

Note: The two object are carrying equal charges.

Where F = Electric force, q = charge, r = distance of separation, k = proportionality constant

<em>Given: F = 4.0 N, q = 1.0 C, </em>

<em>Constant: k = 1/4πe₀ = 9×10⁹ Nm²/C²</em>

<em>Substituting these values into equation 1,</em>

<em>4 = 9×10⁹(1²)/r²</em>

<em>r² = (9×10⁹)/4</em>

<em>r² = 2.25×10⁹</em>

<em>r = √(2.25×10⁹)</em>

<em>r = 4.74×10⁴ m.</em>

<em>Part 2:</em>

<em>F = kq²/r²</em>

<em>Making q the subject of the equation</em>

<em>q = √(Fr²/k)........................... Equation 2</em>

Where: F = 4.0 N, r = 1.0 m, k = 9×10⁹ Nm²/c²

Substituting these values into equation 2

q = √(4×1²/(9×10⁹ )

q = 2.11/10⁴

q = 0.000211 C.

6 0
3 years ago
When will heat STOP flowing
Ostrovityanka [42]

Answer: D. When both objects reach the same temperature.

Explanation: When will heat flow between the objects stop? Heat will always flow from the warmer object to the colder object. The heat transfer will stop when the two objects are at the same temperature and reach thermal equilibrium.

5 0
3 years ago
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if you know the distance traveled by an object in 1 hour, then you can calculate a. its velocity. b. its displacement. c. its av
Yakvenalex [24]
It's velocity, since the formula is d=v*t and the problem already states that the time and distance are known variables
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3 years ago
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CAN SOMEONE PLEASE HELP ME
Anna71 [15]

Answer:

No, it is not fair because they could overdo it and get injured and others may not have it.

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