3 years ago

In a traveling or following spotlight in a musical theater production, the brilliant xenon lamp positioned

Physics

1 answer:

NNADVOKAT [17]3 years ago

3 0

The answer is the letter a

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Wittaler [7]

Snow balls can be fun. In the winter time, and in the Turkey season

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2 years ago

An object that is slowing down in a positive direction must have

zepelin [54]

Answer:

Positive velocity and negative acceleration

Explanation:

An object moving in the positive direction has a positive velocity.

An object that's slowing down while moving in the positive direction has a negative acceleration.

5 0

3 years ago

A 45-mH inductor is connected in series with a 60-Ω resistor through a 15-V dc power supply and a switch. If the switch is close

egoroff_w [7]

Answer:

The current is 0.248 A

Explanation:

Given that,

Inductor $L= 45\times10^{3}\ H$

Resistance $R= 60\Omega$

Voltage = 15 volt

Time $t =7.0\times10^{-3}\ sec$

We need to calculate the current

Using formula of current

$I=\dfrac{V}{R}(1-e^{\dfrac{-R}{L}}t)$

Where, V = voltage

R = resistance

L = inductance

T = time

Put the value into the formula

$I=\dfrac{15}{60}(1-e^{\dfrac{-60}{45\times10^{3}}}\times7\times10^{-3})$

$I=0.248\ A$

Hence, The current is 0.248 A.

4 0

3 years ago

A solid magnesium flare has a mass of 1300 g and a volume of 743 cm3 what is the density of the magnesium

dalvyx [7]

Answer:

$density = 1.75 g/cm^3$

Explanation:

As we know that the mass of the magnesium is given as

mass = 1300 g

volume of the magnesium is

volume = 743 cubic cm

so we will have

$density = \frac{mass}{volume}$

so we will have

$density = \frac{1300}{743}$

$density = 1.75 g/cm^3$

6 0

4 years ago

A car traveling at 7 m/s accelerates at 2.5 m/s^2 to reach a speed of 12 m/s. How long does it take for this acceleration?

AVprozaik [17]

Answer:

Explanation:

v=u+at

12=7+2.5t

t=12-7/5

t=1s

4 0

3 years ago