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AnnyKZ [126]
3 years ago
15

A chemist has two compounds that do not chemically react. He thinks that by finding the right catalyst, he can get them to react

. Why is the chemist incorrect?
Physics
1 answer:
Wewaii [24]3 years ago
4 0
A scientific expert has two exacerbates that don't synthetically respond. He believes that by finding the correct impetus, he can inspire them to respond. The physicist is wrong on the grounds that the impetuses can just build the rate of response for exacerbates that do respond.
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1) A football player kicks a ball at an angle of 30 and gives it a velocity of 15m/s.
mote1985 [20]

Answer:

A) 1.53s

B) 19.8m

C) 2.869m

Explanation:

A) The time of flight for a projectile can be calculated using the formula:

t = 2μsinθ/g

Where; u = velocity

θ = angle

g = acceleration due to gravity (9.8m/s^2)

t = 2 × 15 × sin 30°/9.8

t = 30sin30°/9.8

t = 30 × 0.5/9.8

t = 15/9.8

t = 1.53s

B) The horizontal range (distance) for a projectile can be calculated using the formula:

Range = u²sin2θ/ g

Range = 15² sin 2 × 30 / 9.8

Range = 225 sin 60/9.8

Range = 225 × 0.8660/9.8

Range = 194.855/9.8

Range = 19.8m

C) The maximum height for a projectile can be calculated using the formula:

h = u²sin²θ/2g

h = 15² (sin 30)² / 2 × 9.8

h = 225 × 0.25 / 19.6

h = 56.25/19.6

h = 2.869m

​

3 0
4 years ago
I need help ASAP <br><br> 65 points
loris [4]
I believe the answer is heat.
7 0
3 years ago
Read 2 more answers
Two ponies of equal mass are initially at diametrically opposite points on the rim of a large horizontal turntable that is turni
AleksandrR [38]

Answer:A

Explanation:

Given

Two ponies are at Extreme end of turntable with mass m

suppose turntable is moving with angular velocity \omega

Moment of inertia of Turntable and two ponies

I=I_o+2mr_0^2

let say at any time t they are at a distance of r from center such r

Moment of inertia at that instant

I'=I_0+2mr'^2

I'

conserving angular momentum as net Torque is zero

I\omega =I'\omega '

\omega '=\frac{I}{I'}\times \omega

\omega '>\omega

Thus we can say that angular velocity increases as they move towards each other.        

3 0
3 years ago
The insulating solid sphere in the previous Example 24.5 has the same total charge Q and radius a as the thin shell in the examp
BaLLatris [955]

Answer and Explanation:

Using Gauss's law,

If r>a

then charge enclosed in all the three cases is same as Q.

So Electric field for all three is same.

So {1,1,1}.

(b) r<a,

Charge enclosed in case of shell is zero since all charge is present on the surface. So E = 0.

Charge enclosed by incase of point charge is Q.

Charge enclosed in case of sphere is Qr3/a3 which is less than Q.

So ranking {2,3,1}

6 0
4 years ago
An incident ray traveling in a slower medium strikes a boundary with a faster medium. What happens when its angle of incidence i
inn [45]
The phenomenon that is observed when an incident ray travelling in a slower medium strikes the boundary of a faster medium with an angle greater than the critical angle is known as total internal reflection.
Total internal reflection results in the the ray being reflected within the medium, instead of leaving it after undergoing diffraction. This phenomenon is the working principle of optical fibers. 
3 0
4 years ago
Read 2 more answers
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