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3 years ago

What is the kinetic energy of a baseball with a mass of 0.133 kg and moving at a speed of 28.7m/s

Physics

1 answer:

blsea [12.9K]3 years ago

3 0

Answer:

54.7 J

Explanation:

kinetic energy formula

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Two charged particles attract each other with a force of magnitude F acting on each. If the charge of one is doubled and the dis

irakobra [83]

Answer:

F/2

Explanation:

In the first case, the two charges are Q1 and Q2 and the distance between them is r. K is the Coulomb's constant

Hence;

F= KQ1Q2/r^2 ------(1)

Where the charge on Q1 is doubled and the distance separating the charges is also doubled;

F= K2Q1 Q2/(2r)^2

F2= 2KQ1Q2/4r^2 ----(2)

F2= F/2

Comparing (1) and (2)

The magnitude of force acting on each of the two particles is;

F= F/2

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3 years ago

10. The shape of the earth is A taco b. A carrot C. A sphere d. A potato

expeople1 [14]

Answer:

C. A sphere.

Explanation:

I'm 100% sure.

6 0

3 years ago

A police car is driving down the street with it's siren on. You are standing still on the sidewalk beside the street. If the fre

diamong [38]

Answer:

A) 1568.60 Hz

Explanation:

This change is frequency happens due to doppler effect

The Doppler effect is the change in frequency of a wave in relation to an observer who is moving relative to the wave source

$f_(observed)=\frac{(c+-V_r)}{(C+-V_s)} *f_(emmited)\\$

where

C = the propagation speed of waves in the medium;

Vr= is the speed of the receiver relative to the medium,(added to C, if the receiver is moving towards the source, subtracted if the receiver is moving away from the source;

Vs= the speed of the source relative to the medium, added to C, if the source is moving away from the receiver, subtracted if the source is moving towards the receiver.

A) Here the Source is moving towards the receiver(C-Vs)

and the receiver is standing still (Vr=0) therefore the observed frequency should get higher

$f_(observed)=\frac{C}{C-V_s} *f_(emmited)\\=\frac{343}{343-15}*1500\\ =1568.60 Hz$

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3 years ago

Which situation could be considered pseudoscience?

kap26 [50]

In situation #2, students are gathering to record their beliefs regarding a certain pseudoscientific area of horsefeathers.

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3 years ago

Read 2 more answers

______________ waves move perpendicular to their energy transport, while ____________ waves move parallel to their energy transp

Mademuasel [1]

Transverse waves waves move perpendicular to their energy transport, while Longitudinal waves waves move parallel to their energy transport.

4 0

4 years ago