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Mamont248 [21]
2 years ago
15

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?

Show your work and include the correct units with your answer.
Physics
1 answer:
Naya [18.7K]2 years ago
6 0

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}

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When dots are placed on a page from a laser printer, they must be close enough so that you do not see the individual dots of ink
Dovator [93]

Answer:

 y <8 10⁻⁶ m

Explanation:

For this exercise, they indicate that we use the Raleigh criterion that establishes that two luminous objects are separated when the maximum diffraction of one of them coincides with the first minimum of the other.

 Therefore the diffraction equation for slits with m = 1 remains

             a sin θ = λ

in general these experiments occur for oblique angles so

             sin θ = θ

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in the case of circular openings we must use polar coordinates to solve the problem, the solution includes a numerical constant

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The angles in these measurements are taken in radians, therefore

          θ = s / R

as the angle is small the arc approaches the distance s = y

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let's calculate

            y = 1.22 500 10⁻⁹ 0.42 / 0.032

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4 0
3 years ago
A train moves with a constant velocity for 15s for 155m. How fast is the train moving?
bonufazy [111]

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Explanation:

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Eq(1):  distance  = velocity times time <=> d = v*t    for v=constant.

If we solve Eq (1) for the velocity (v) we obtain:

Eq(2):  velocity  = distance divided by time <=> v = d/t

Substituting the known values for t=15s and d=155m we get:

v = 155 / 15 <=> v = 10.3

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3 years ago
HELLPPPP. The metalloid that has three valence electrons is ___________?​
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Answer:

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Explanation:

8 0
3 years ago
What is the average power dissipated by a resistor of resistance R = 25 Ω in an LRC circuit for which the power factor is equal
olga55 [171]

Answer:

0.08 w

Explanation:

AVERAGE POWER : Average power is defined as the average work per unit time. average power is denoted by P its depend on the voltage current and power factor.

the expression for the average power is given as

P=V_rI_r cosΦ

We have given maximum voltage =8 volt

V_r=\frac{8}{1.414}

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resistance =25Ω

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power factor=\frac{25}{Z}

From here Z=100

P=\frac{8}{1.414} ×\frac{v_r}{Z} ×cosΦ

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3 0
3 years ago
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