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Westkost [7]
3 years ago
6

You throw a stone vertically upward with an initial speed of 6.4 m/s from a third-story office window.

Physics
1 answer:
Gwar [14]3 years ago
5 0
-12 = 6.2*t - 4.9*t² → t = 2.32 sec (quadratic formula) 

<span>V = Vi -g*t = 6.2 - 9.8*2.32 = -16.5 m/s</span>
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A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car
dangina [55]
Her magnitude of deceleration on the ice would be 15.126m/s
5 0
3 years ago
A 1120 kg car traveling initially with a speed of 27.40 m/s in an easterly direction crashes into the back of a 9 490 kg truck m
asambeis [7]

Answer:

41.5 m/s

Explanation:

Since there are no external forces, momentum must be conserved.

Momentum P = mv.

Total momentum before the collision:

P = m_{car}v_{car} + m_{tru}_{ck}v_{tru}_{ck} = 1120 * 27.4 + 490 * 20 = 40.488

Total momentum after the collision:

P = 1120 * 18 + 490 * v_{tru}_{ck} = 40.488

solving for v:

v_{truck} = 41.5

8 0
3 years ago
The deflection of alpha particles in rutherford’s gold foil experiments resulted in what change to the atomic model? the additio
skelet666 [1.2K]
The answer is: The addition of a small dense nucleus at the center of the atom.
5 0
3 years ago
Read 2 more answers
A.
lorasvet [3.4K]

Answer:

A) Option 1 is the correct answer.

B) Option 4 is the correct answer.

Explanation:

A) Weight of liquid = 7 N

    Volume of liquid = 1 L = 0.001 m³

    Specific weight =  \frac{7}{0.001}=7000N/m^3

    Density = \frac{7000}{9.81}=713.5kg/m^3

    Specific gravity = \frac{713.5}{1000}=0.7135

    Option 1 is the correct answer.

B) The Stokes(St) is the cgs physical unit for kinematic viscosity, named after George Gabriel Stokes.

We have

             1 St = 10⁻⁴ m²/s

    Option 4 is the correct answer.        

7 0
3 years ago
What is the volume in liters of the basketball?
babymother [125]

he basket ball diameter used by NBA men players is around 9.55 inches

So diameter = 9.55 inch = 0.243 m

So radius of basket ball = 0.1215 m

Volume , V=\frac{4}{3} \pi r^3

V = \frac{4}{3}* \pi *0.1215^3=0.0075 m^3=7.5 L

So volume of basket ball used by men NBA players = 7.5 L

   

5 0
3 years ago
Read 2 more answers
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