3 years ago

A baseball travels 50 meters in 4 seconds what is the average velocity of the baseball?

Physics

1 answer:

beks73 [17]3 years ago

5 0

The average velocity is 12.5 meters per second

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Under very dim levels of illumination foveas react to increase the sensitivity of the optic nerve. rods are more light-sensitive

Alex777 [14]

Answer:

rods are more light sensitive than cones.

Explanation:

There are two types of photo receptors in retina of our eyes. 1 Rods and 2 Cones. Rods are about 120 million and they are more sensitive then the cones. But the rods are not sensitive to color. Cones help us in seeing the color and there are about 6 to 7 million cones that provide color sensitivity to our eyes. That is why in the dark or where their are dim levels of illumination rods provide us scotopic vision. Because rods are more light sensitive then the cones.

7 0

4 years ago

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There was a major collision of an asteroid with the Moon in medieval times. It was described by monks at Canterbury Cathedral in

LekaFEV [45]

Answer:

c = 3.00E108 m/s = 3.00E5 km/s

t = S / v = 3.84E5 / 3.00E5 = 1.28 sec

4 0

3 years ago

A rock of mass m is twirled on a string in a horizontal plane. The work done by the tension in the string on the rock is..

anyanavicka [17]

Answer:

work done by tension force on the twirled stone must be ZERO always

Explanation:

As we know that work done by a force on an object is given as

$W = F.d$

$W = Fdcos\theta$

here we know that

$\theta$ = angle between force and displacement

now we know that tension in the string and displacement of the object is always perpendicular to each other when the rock is twirled in circular path.

so we can say for this motion of the stone

$cos\theta = 0$