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3 years ago

A car travels 60 miles per hour. how much time does it takes the car to travel 30 miles?

Physics

2 answers:

elena55 [62]3 years ago

7 0

1 hour= 60 mins

60 mins= 60 miles

30 miles= (60 miles÷60 minutes)×30 miles

=30 mins

I am Lyosha [343]3 years ago

7 0

1 hr = 60 minutes 60 minutes / 60 miles = 1 minutes/miles 30 miles * 1 minute = 30 minutes 30 minutes

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Bingel [31]

Answer:

k = 3.5 N/m

Explanation:

It is given that the time period the bob in pendulum is the same as its time period in spring mass system:

$Time\ Period\ of\ Pendulum = Time\ Period\ of\ Spring-Mass\ System\\2\pi \sqrt{\frac{l}{g}} = 2\pi \sqrt{\frac{m}{k}$

$\frac{l}{g} = \frac{m}{k}\\\\ k = g\frac{m}{l}$

where,

k = spring constant = ?

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m = mass of bob = 125 g = 0.125 kg

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Therefore,

$k = (9.81\ m/s^2)(\frac{0.125\ kg}{0.35\ m})\\\\$

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3 years ago

The escape speed from an object is v2 = 2GM/R, where M is the mass of the object, R is the object's starting radius, and G is th

Rom4ik [11]

Answer:

Approximate escape speed = 45.3 km/s

Explanation:

Escape speed

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Here we have

Gravitational constant = G = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

R = 1 AU = 1.496 × 10¹¹ m

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Approximate escape speed = 45.3 km/s

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3 years ago

A bird sits on a high-voltage power line with its feet 3.87 cm apart. The wire is made from aluminum, is 2.11 cm in diameter, an

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Answer:

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Explanation:

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R=(pL)/A

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Length L=3.87 cm =0.0387m

Diameter d=2.11 cm =0.0211 m

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ΔV=IR

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3 years ago

An unstable atomic nucleus has a mass of 17.010-27kg, and starts out at rest. When it decays, it the original nucleus disintegra

slega [8]

Answer:

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Part b)

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Part b)

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3 years ago

an aircraft landing on an air craft carrier is brought to a complete stop from an inital velocity of 215km/hr in 2.7 seconds. wh

worty [1.4K]

u= 215 km/hr = 215 * 1000/ 3600 = aprx 60m/s
v=0
t=2.7sec
v= u - at
u= at
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Hope it helps

8 0

3 years ago