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3 years ago

An unbanked circular highway curve on level ground makes aturn

Physics

1 answer:

tino4ka555 [31]3 years ago

4 0

Answer:

Explanation:

Given

Velocity of traffic $v=60\ mi/hr\approx 26.82\ m/s$

Maximum value of Centripetal force is one-tenth of weight

such that $(F_c)_{max}=\frac{mg}{10}$

to make a safe turn centripetal force with radius of curvature r is given by

$F_c=\frac{mv^2}{r}$

$(F_c)_{max}=\frac{mg}{10}=F_c=\frac{mv^2}{r}$

$\frac{mg}{10}=\frac{mv^2}{r}$

$r=\frac{10v^2}{g}$

$r=\frac{10\times 26.82^2}{9.8}$

$r=733.99\approx 734\ m$

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A capacitor charging circuit consists of a battery, an uncharged 20 μF capacitor, and a 6.0 kΩ resistor. At t = 0 s the switch i

aliya0001 [1]

Answer:

Battery voltage will be equal to 9.65 volt

Explanation:

We have given capacitance $C=20\mu F=20\times 10^{-6}F$

Resistance $R=6kohm=6000ohm$

Time constant of RC circuit is

$\tau =RC=20\times 10^{-6}\times 6000=0.12sec$

Time is given t = 0.15 sec

Current i = 0.46 mA

Current in RC circuit is given by

$i=\frac{V}{R}e^{\frac{-t}{\tau }}$

$0.00046=\frac{V}{6000}e^{\frac{-0.15}{0.12 }}$

$0.00046=\frac{V}{6000}\times 0.286$

V = 9.65 volt

So battery emf will be equal to 9.65 volt

5 0

3 years ago

Which statements describe solstices? Select 3 correct choices. They occur when the Sun reaches its highest or lowest point in th

Contact [7]

The statements that best describe solstices include:

A. They occur when the Sun reaches its highest or lowest point in the sky.

B. They affect the amount of sunlight in the Northern Hemisphere in June.

D. They influence the cycling of different seasons based on the Sun's height in the sky.

A solstice can be defined as a phenomenon in which the Sun reaches its maximum or minimum declination relative to the celestial equator on the celestial sphere, thereby, producing either the least amount of daylight time within a day or the most amount of daylight time. Also, it occurs twice in a year between June 20-22 and December 21-23.

Traditionally, solstice marks the beginning (start) of seasons such as summer and winter depending on the hemisphere.

Hence, the statements that best describe solstices include:

Solstices occur when the Sun reaches its highest (maximum) or lowest (minimum) point in the sky.

Solstices affect the amount of daylight time (sunlight) in the Northern Hemisphere in June.

Solstices influence the cycling of different seasons depending on the Sun's height in the sky.

Read more on solstices here: brainly.com/question/5133631

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2 years ago

If the mass of the Jupiter is 1.9*10 kg and radius is fbx loom what is acclerallon due to gravity on the supiter ?

Bond [772]

Answer:

$g=25.92\ m/s^2$

Explanation:

Given that,

The mass of the Jupiter, $M=1.9\times 10^{27}\ kg$

The radius of Jupiter, $r=69,911\ km=69911\times 10^3 km$

We need to find the acceleration due to gravity on Jupiter. The formula is

$g=G\dfrac{M}{r^2}$

Put all the values,

$g=6.67\times 10^{-11}\times \dfrac{1.9\times 10^{27}}{(69911\times 10^3)^2}\\\\g=25.92\ m/s^2$

So, the value of acceleration due to gravity on the Jupiter is $25.92\ m/s^2$ .

6 0

3 years ago

A 160-N child sits on a light swing and is pulled back and held with a horizontal force of 100 N. The magnitude of the tension f

guajiro [1.7K]

Answer:

T = 190 N

Explanation:

When child is sitting on the swing then the weight of the child is vertically downwards

So it is

$F_g = 160 N$

now a force of 100 N is acting on the swing in horizontal direction

so it is given as

$F_x = 100 N$

now the net force is resultant force due to gravity and horizontal force

so it is given as

$T = \sqrt{F_x^2 + F_g^2}$

$T = \sqrt{100^2 + 160^2}$

$T = 190 N$

3 0

3 years ago

At some point in an underground horizontal pipe, the speed of water is 2.5m/s and the gauge pressure is 2×104 Pa. What is the ga

lys-0071 [83]

The gauge pressure of the pipe is 2.234 ×10⁴ Pa, if the pipe is changed for another twice the area.

To find the gauge pressure the values given are,

speed of water = 2.5 m/s

Gauge pressure = 2×10⁴ Pa

<h3>What is pressure?</h3>

Definition:

Pressure can be defined as the total applied force per unit of area. The pressure depends both on externally applied force as well the area on which it is applied.

To find the gauge pressure first we have use continuity equation,

A ₁V₁ = A₂V₂

By the given condition: As the area is increased to twice the original area

A ₁V₁ = 2A₁V₂

A₁ gets cancelled on both the sides,

V₂ =V₁/2

=2.5 /2

V₂=1.25 m/s

Then, substituting the values in Bernoulli's equation,

Equation is given as,

P₁ + 1/2 ρV₁² = P₂ + 1/2 ρV₂²

Taking 1/2 ρ as common,

P₂ = 2×10⁴ + 1/2 ×1000×(2.5² -1.25²)

= 2×10⁴ + 2343.75

=22343.75 Pa

=2.234 ×10⁴ Pa

Thus, if the pipe is changed for another twice the area then the gauge pressure is 2.234 ×10⁴ Pa.

Learn more about pressure,

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6 0

1 year ago