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4 years ago

WHOEVER GET IT RIGHT GETS 50 POINTS

Physics

1 answer:

AVprozaik [17]4 years ago

3 0

Answer:

ANSWER BELOW I

Remember that w=mg where w is weight in Newtons, m is mass in kilograms, and g is gravity in

m/s2

. For example, for Earth, 445 N = 45.4 × 9.8

m/s2

:Notice that the x-axis values will be gravity in

m/s2

, which is already given in the table, and the y-axis values will be the weight in Newtons. Remember to round your weights to a whole number, and to enter the points starting with the lowest gravity (moon, then Mars, then Venus, then Earth).

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When solid surfaces slide over each other, the kind of friction that occurs is called_____ friction.

expeople1 [14]

Answer:

Sliding Friction

Explanation:

The term sliding friction refers to the resistance created by two objects sliding against each other. This can also be called kinetic friction. Sliding friction is intended to stop an object from moving.

7 0

3 years ago

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Where is this earthquake's epicenter?

Studentka2010 [4]

The correct answer is C

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4 years ago

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There’s 5.68 s until the end of a "Red Light, Green Light" game, when "Green Light" is called. You start atrest and accelerate a

shutvik [7]

Answer:

SQUID game imagine

Explanation:

7 0

3 years ago

A piston–cylinder device initially contains 0.22 kg of steam at 200 kPa and 300°C. Now, the steam is cooled at constant pressure

wel

Explanation:

Defining compressibility factor (Z), which is also known as the gas deviation factor, is a correction factor which describes the deviation of a real gas from ideal gas behaviour.

Z = p/(density * Rs *T)

Where Rs is specific gas constant =R/M

Deriving the volume values from steam tables,

At 200kPa and 300°C, V1 = 1.31623 m3/kg

At 200kPa and 150°C, V2 = 0.95986 m3/kg

Change in volume, DV = m(V1 - V2)

= 0.2*(1.31623 - 0.95986)

= 0.07128 m3/kg

Also from steam tables,

The critical pressure, Pc = 22.06MPa

The critical temperature, Tc = 647.1K

Remember, gas constant, R = 0.4615 kPa.m3/kg.K

Therefore, reduced temperature at initial state, Tr = T1/Tc

= (360 + 273)/647.1

= 0.886

Also, reduced pressure at initial state, Pr = P1/Pr

= 200 x 10^-3/22.06

= 0.0091

But compressibility factor at initial state, Z1 = 0.9956

Ideal volume, Vi = m*R*T/P1

= (0.2*0.4615*(300+273))/200

= 0.2644m3

Compressibility volume, Vc = Z1*Vi

= 0.9956* 0.2644

= 0.2633m3

Reduced temperature at final state, Tr = T2/Tc

= (150+273)/647.1

= 0.65

Reduced pressure at final state, Pr = P2/Pc

= 200 x 10^-3/22.06

= 0.0091

Compressibility factor at final state, Z2 = 0.9897

3 0

4 years ago

The intensity I of light from a light bulb, measured in watts per square meter (w/m squared), varies inversely as the square

DerKrebs [107]

Answer:

$157.5W/m^2$

Explanation:

We are given that

$I=70w/m^2$

When d=3 m

We have to find the intensity when the distance from the light bulb is 2 m away.

According to question

Intensity, $I\propto\frac{1}{d^2}$

$I=\frac{kd^2}$

Where k=Proportionality constant.

Substitute the values

$70=\frac{k}{3^2}$

$k=70\times 3^2=630$

Intensity when d=2 m

$I=\frac{630}{2^2}=157.5W/m^2$

6 0

3 years ago