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coldgirl [10]
2 years ago
6

Why is brainly so dumb? I am currently trying to get into my account right now, and even though I JUST changed it, it keeps sayi

ng “incorrect username or password”. Dont tell someone to make an account if you’re just going to lock them out of it.
Physics
2 answers:
MrRa [10]2 years ago
8 0

Answer:

That happens to me a few times.

Are you sure you are on Brainly.com and not Brainly.Ly?

icang [17]2 years ago
5 0

Simple. They spend more time trying to get money out of your pocket than fixing what obviously doesn't work :)

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Newton's first law of motion says (in part) that an object in motion will remain in motion at a constant speed and in a straight
kolbaska11 [484]

Your answer is C. Unbalanced

unbalanced forces change the direction and speed of objects, therefore it would change the constant speed of an object in motion.

Hope this helps u!

6 0
3 years ago
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In 1995 a research group led by Eric Cornell and Carl Wiemann at the University of Colorado successfully cooled Rubidium atoms t
saveliy_v [14]

Answer:

0.00493 m/s

Explanation:

T = Temperature of the isotope = 85 nK

R = Gas constant = 8.341 J/mol K

M = Molar mass of isotope = 86.91 g/mol

Root Mean Square speed is given by

v_r=\sqrt{\dfrac{3RT}{M}}\\\Rightarrow v_r=\sqrt{\dfrac{3\times 8.314\times 85\times 10^{-9}}{86.91\times 10^{-3}}}\\\Rightarrow v_r=0.00493\ m/s

The Root Mean Square speed is 0.00493 m/s

6 0
3 years ago
Give one example of a question that science would not be able to test.
Strike441 [17]
DOES GOD EXIST? That is one of the best.
8 0
3 years ago
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Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. How long will the bal
Step2247 [10]

Answer:

T = 1.2 s

T = 15.1 m = 15 m

Explanation:

This is a case of projectile motion:

TOTAL TIME OF FLIGHT:

The formula for total time of flight in projectile motion is:

T = 2 V₀ Sinθ/g

where,

T = Total Time of Flight = ?

V₀ = Launch Speed = 13.9 m/s

θ = Launch Angle = 25°

g = 9.8 m/s²

Therefore,

T = (2)(13.9 m/s)(Sin 25°)/(9.8 m/s²)

<u>T = 1.2 s</u>

<u></u>

RANGE OF BALL:

The formula for range in projectile motion is:

R = V₀² Sin2θ/g

where,

R = Horizontal Distance Covered by ball = ?

Therefore,

T = (13.9 m/s)²(Sin 2*25°)/(9.8 m/s²)

<u>T = 15.1 m = 15 m</u>

4 0
3 years ago
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The normal force is always perpendicular to the surface. So it would be straight to the left of the wall
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