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Nesterboy [21]
3 years ago
11

Why do you see lightning before you hear thunder

Physics
1 answer:
igomit [66]3 years ago
5 0

Answer: When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel. Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder. The reason we see lightning before we hear thunder is because light travels faster than sound!

Explanation:

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What happens to the compass needle as you move the compas<br> around the magnet?
Ugo [173]

Answer:

When you moved the compass near a bar magnet, the needle pointed toward the magnet's magnetic field and not toward the north.

Explanation:

4 0
3 years ago
For a process at constant pressure, 12,400 calories of heat are released. this quantity of heat is equivalent to
Vinvika [58]

Answer:

51,882 J

Explanation:

In order to convert the heat from calories to joule, we must remember the conversion factor:

1 cal = 4.184 J

Keeping in mind this, we can set up a proportion to find how much Joules correspond to 12,400 calories:

1 cal : 4.184 J = 12,400 cal : x\\x=\frac{(4.184 J)(12400 cal)}{1 cal}=51,882 J

6 0
3 years ago
The fastest pitched baseball was clocked at 47 m/s. Assume that the pitcher exerted his force (assumed to be horizontal and cons
Eduardwww [97]

Answer:

Following are the solution to the given points:

Explanation:

For point a:

Find the schematic of the empty body and in attachment. Upon on ball during the pitch only two forces act:

The strength of the pitcher F is applied that operates horizontally. Its gravity force acting on an object is termed weight, which value is where m denotes mass, and g the acceleration of gravity.

For point b:

160.2\  N

First, they must find that ball's acceleration. You can use the SUVAT equation to achieve that

where

v = 47\  \frac{m}{s} \\\\u = 0 \\\\a =?\\\\d = 1.0 \ m \\\\

Solving for a,

a=\frac{v^2-u^2}{2d}=\frac{47^2-0}{2(1.0)}=1104.5 \ \frac{m}{s^2}

Calculating the mass:

m = 145 g = 0.145 kg

Calculating the force:

F=ma=0.145 \times 1104.5= 160.2 \ N

 For point c:

0.195 times the pitcher's weight

m = 84 \ kg \\\\g = 9.8\ \frac{m}{s^2}\\\\

Solving for W:

W=84 \times 9.8= 823.2 \ N

Now the force of Part B could be defined as the fraction of the mass of the pitcher:  

\frac{F}{W}=\frac{160.2}{823.3}=0.195

4 0
3 years ago
GUESS WHAT??? I'LL MAKE YOU BRAINLIEST!!! HURRY AND ANSWER THIS!!!
____ [38]

Your answer is B

Plz give brainliest and I will answer all your future questions

8 0
3 years ago
Read 2 more answers
A squirrel, a train, a bird, and a car are all traveling at the same velocity. Which object has the greatest amount of kinetic e
Tanzania [10]
The greatest amount of kinetic energy is found with the train because it takes most energy to reach that velocity and also to slow down to a halt.
3 0
3 years ago
Read 2 more answers
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