A graduated cylinder has 20 ml (cm3) of water placed in it. An irregularly shaped rock is then dropped in the graduated cylinder and the volume of the rock and water in the cylinder now reads 30 ml (cm3). The mass of the rock dropped into the graduated cylinder is 23 grams.a.) Find the volume of the rock dropped into the graduated cylinder.
b.) Find the density of the rock dropped into the graduated cylinder.

Answer:

the acceleration is 2.5 MPH over 12 mins.

Explanation:

30 MPH in 12 minutes=

30/12=

2.5

Explanation :

When the car accelerates, our body pushed backward against the seat. This effect is due to inertia.

When the car starts suddenly, our feet also comes in motion. But the rest body is still at rest.

Inertia is the property of a body which opposes its state of rest or state of motion.

In this case, the inertia of the passenger resists the motion of the car. So, he pushed backwards as the car started.  

The maximum height that the rock attains is : 7.42 m

Given data :

Vi = 15.0 m/s

uk = 0.425

angle made by roof ( θ ) = 42.0°

Calculating the maximum height reached by the rock

First step : calculate the deceleration of the rock

a = g*sinθ + uk * g * cosθ

  = 9.8 * sin 42° + 0.425 * 9.8 * cos 42°

  = 9.65 m/s²

Applying motion formula

v² = u² + 2as

    = 15² - 2 * 9.65 * 10

 v  = 5.66 m/s

Initial height attained ( h₁ ) =  10 sin θ

                                           =  10 * sin 45°

                                           =  6.69 m

considering vertical height

V (y) = v sin θ

       = 5.66 sin 42

       = 3.79 m/s

Next step : Calculate  height ( h₂ )

v² = u² + 2 a s

0 = 3.79² - 2 * 9.8 * h₂

therefore :  h₂ = 0.73 m

The maximum height attained by the rock ( H ) = h₁ + h₂

                                                                              = 6.69 + 0.73 = 7.42 m

Hence we can conclude thatThe maximum height that the rock attains is : 7.42 m

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Answer:

h = 7.42 m

Explanation:

deceleration of the rock

a = 9.65 m/s²

using formula

v² = u² + 2 a s

v² = 15² - 2×9.65 × 10

v = 5.66 m/s

the height attained is

h₁ =  10 sin θ

   = 10 sin 42

   = 6.69 m

now with vertical velocity it will reach to the height h₂

v y = v sin θ

     = 5.66 sin 42

     = 3.79 m/s

height is

v² = u² + 2 a s

0 = 3.79² - 2 × 9.8 ×h₂

h₂ = 0.73 m

the maximum height is

h = h₁ + h₂

  = 6.69 + 0.73

h = 7.42 m

Answer:

A. constructive interference.

Explanation:

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Final answer:

The two variables that affect current in a circuit according to Ohm's law are voltage and resistance. If voltage increases, current increases assuming resistance remains constant. Conversely, if resistance increases, current decreases.

Explanation:

According to Ohm's law, the two variables that affect the amount of current in a circuit are voltage and resistance. If the voltage in a circuit is increased, according to Ohm's law, so is the current, providing the resistance doesn't change. On the other hand, if the resistance in a circuit is increased, the current is reduced.

For instance, if we consider a simple electric circuit with a battery and a light bulb. If the voltage of the battery is increased, more current will flow, and the light bulb will shine brighter. However, if the resistance (for example by adding another light bulb in series) is increased, less current will flow, and the bulbs will be dimmer.

Learn more about Ohm's Law here:

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