List and describe the forces that act on a block as it moves down the ramp at constant speed.

What is another principle an artist can follow to create the illusion of depth on a flat surface?

Daniel [21]

It can be both flat or it can be when you have new eyeglasses on and you look down it makes you think the ground looks like that but its not

3 0

3 years ago

A 0.350 kg block at -27.5°C is added to 0.217 kg of water at 25.0°C. They come to equilibrium at 16.4°C. What is the specific he

Gekata [30.6K]

The specific heat capacity of the block is $508J/kg^{\circ}C$

Explanation:

As the block is placed into the water, heat energy is transferred from the water (which is at higher temperature) to the block (which is at lower temperature), until the block and the water are in thermal equilibrium (= same temperature).

Therefore, we can write:

$Q_{water}=Q_{block}$

Where

$Q_{water}=m_w C_w (T_w-T_{eq})$ is the heat energy released by the water, where

$m_w = 0.217 kg$ is the mass of the water

$C_w = 4186 J/kg^{\circ}C$ is the water heat specific capacity

$T_w = 25.0^{\circ}$ is the initial temperature of the water

$T_{eq}=16.4^{\circ}$ is the temperature at equilibrium

Substituting,

$Q_{water}=(0.217)(4186)(25.0-16.4)=7812 J$

Now we can write the heat energy absorbed by the block as

$Q_{block}=m_b C_b(T_{eq}-T_b)$

where

$m_b=0.350 kg$ is the mass of the block

$C_b$ is the specific heat capacity of the block

$T_b = -27.5^{\circ}$ is the initial temperature of the block

And solving for $C_b$ ,

$C_b=\frac{Q_{block}}{m_b(T_{eq}-T_b)}=\frac{7812}{(0.350)(16.4-(-27.5))}=508J/kg^{\circ}C$

Learn more about specific heat capacity:

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6 0

3 years ago

Daria was swimming in a friend’s pool yesterday, when she saw that a fly had landed in the water about 5 feet away from her. She

jasenka [17]

Answer:

Daria probably suffers from Entomophobia.

5 0

3 years ago

1. What is true about elements

yaroslaw [1]

W is the noble gas having atomic number 10 and configuration (2,8)
x, y and z are the s block elements. They have 2,2 and 1 electrons in their outermost shell respectively.
Atomic size decreases across the period and increases down the group. Element z is having more atomic size.

Hope it helps you!!!!

7 0

3 years ago

As a train accelerates away from a station, it reaches a speed of 4.6 m/s in 5.2 s. If the train's acceleration remains constant

Svet_ta [14]

Answer:

Vf = 10.76 m/s

Explanation:

Train kinematics

The train moves with uniformly accelerated movement

$V_f = V_o + a*t$ Formula (1)

Vf: Final speed (m/s)

V₀: Inital speed (m/s)

t: time in seconds (s)

a: acceleration (m/s²)

Movement from t = 0 to t = 5.2s

We replace in formula (1)

4.6 = 0 + a*5.2

a = 4.6/5.2 = 0.88 m/s²

Movement from t = 5.2s to t = 5.2s + 7s = 12.2s

We replace in formula (1)

$V_f = 4.6 + 0.88*7$

Vf = 10.76 m/s

3 0

3 years ago