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Tanya [424]
3 years ago
14

Give an example of a theory scientists believed for a long time that was eventually proved false

Physics
1 answer:
jolli1 [7]3 years ago
6 0
There are so many to choose from, I'll give you two. One is a big one. The other so/so. People used to believe the earth was flat and you would fall off, until Christopher Columbus sailed across. And another interesting one is the vulcan planet theory, which is that there was an extra planet between Mercury and T sun. however it turned out to be false. So there, need anymore just tell me.
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I have these questions I need to find the acceleration, Please explain how to do them, Don't have to explain all xD
34kurt
1. a=(v-v0)/t
a=14 m/s / 2s
a=7 m/s^2
2. <span>a=(v-v0)/t
</span>a=(30 m/s - 0 m/s) / 12 s
a=2.5 m/s^2
3. <span>a=(v-v0)/t
a=(37 m/s - 22 m/s) / 2 s
a= 7.5 m/s^2
4. </span><span>a=(v-v0)/t
a=(12 km/s - 0 km/s)/8 s
a=1.5 km/s^2
etc</span>
7 0
4 years ago
The “turning effect of a force” (T = F * r) is:
Doss [256]

Answer:

b and e

Explanation:

r x F is the formula for torque.

The "turning effect" or torque happens when concentric forces rotate an object along said center.

a) False because T = Fr = Ia (a = angular acceleration)

b) True

c) False. L = Iw (w = angular velocity), which does not equal Ia

d) False. It is torque, not the product of torque and something else

e) True.

8 0
3 years ago
Explain why smoke particles in air move about faster if the temp of the air is increased??
Harlamova29_29 [7]

Answer:

kinetic energy increases with the energy which causes the particles to move faster resulting in increases collision rates and rate of diffusion.

Explanation:

6 0
3 years ago
What is light intensity? ​
Stels [109]

Answer:

Light intensity refers to the strength or amount of light produced by a specific light source .

8 0
3 years ago
You buy a magnifying glass at the store. The lens in the magnifying glass is a double convex lens, a lens with two convex curved
Leokris [45]

Answer:

30 cm

Explanation:

f = Focal length = 25 cm

R = Radius of curvature (both sides are equal)

\mu = Refractive index of lens = 1.6

The lens maker formula is given by

\frac{1}{f}=(\mu-1)(\frac{1}{R_1}-\frac{1}{R_2})\\\Rightarrow \frac{1}{f}=(\mu-1)(\frac{1}{R}-\frac{1}{-R}) minus sign because it is on the other side

\\\Rightarrow \frac{1}{f}=(\mu-1)\frac{2}{R}\\\Rightarrow R=2(\mu-1)f\\\Rightarrow R=2(1.6-1)\times 25\\\Rightarrow R=30\ cm

The radius of curvature of the glass surface is 30 cm

8 0
4 years ago
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