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3 years ago

14

A racing car accelerates at the end of the race from a speed of 100

1 answer:

nevsk [136]3 years ago

5 0

4/3 m/s ( approximately 1.3333... m/s)

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What is the charge of an object that has lost 25 electrons?

Wewaii [24]

A negative charge i guess

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4 years ago

Reflection occurs in many scenarios in our everyday life. Reflection occurs

RideAnS [48]

Reflection occurs in many scenarios in our everyday life. Reflection occurs
when light travels in one medium and comes into contact with another.
However, what if a light wave is moving from one location to another but
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it will reflect with the same amount of intensity

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3 years ago

You need to design a banked curve at the new circular Super 100 Raceway. The radius of the track is 800 m and cars typically tra

uysha [10]

Answer:

$33.1^{\circ}$

Explanation:

Let's start by writing the equations of the forces along the two directions:

- Vertical:

$N cos \theta = mg$

where

N is the normal reaction

$\theta$ is the angle between the road and the horizontal

(mg) is the weight of the car, with m being its mass and g the acceleration of gravity

- Horizontal:

$N sin\theta = m \frac{v^2}{r}$

where

v is the speed of the car

r is the radius of the turn

Dividing the 2nd equation by the 1st one, we get:

$tan \theta = \frac{v^2}{rg}$

In this problem:

$r = 800 m$ (radius of the turn)

$v=160 mi/h = 71.5 m/s$ is the speed

$g=9.8 m/s^2$

Substituting, we find:

$\theta= tan^{-1} (\frac{v^2}{rg})=tan^{-1}(\frac{(71.5)^2}{(800)(9.8)})=33.1^{\circ}$

8 0

4 years ago

Atoms of the same element that differ only in the number of neutrons are known as.

True [87]

Answer:

They are known as isotopes

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3 years ago

Which of the mathematical sign below would best complete the following statement?

vredina [299]

Answer:

B

Explanation:

option b stands for less down and cm is less than km

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3 years ago