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sesenic [268]
3 years ago
11

Clutter is _______. annoying frustrating death

Physics
2 answers:
Alex_Xolod [135]3 years ago
5 0

Answer:

death

Explanation:

Sindrei [870]3 years ago
3 0

Answer: _____= beautiful, yet annoying frustrating death

Explanation:

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A cup sits on a table. Due to its position, the potential energy of the cup is 3.00 joules. Ignoring frictional effects, if the
Butoxors [25]
Due to conservation of energy, half way the potential energy will be 1.5J so the remaining 1.5J is kinetic energy.
6 0
4 years ago
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In August 2011, the Juno spacecraft was launched from Earth with the mission of orbiting Jupiter in 2016. The closest distance b
Vikentia [17]

(a) 8927 mi/h

In order to calculate the average speed, we need to convert the time (t=5.0 y) into hours first. In 1 year, we have 365 days, each day consisting of 24 hours, so the time taken is:

t=(5.0 y)(365 d/y)(24 h/d)=43,800 h

The distance covered by the spacecraft is

d=391 mil. mi = 391\cdot 10^6 mi

Therefore, the average speed is just the ratio between the distance covered and the time taken:

v=\frac{d}{t}=\frac{391\cdot 10^6 mi}{43,800 h}=8,927 mi/h

(b) 35 minutes (2097 seconds)

The transmitted signals (which is a radio wave, which is an electromagnetic wave) travels back to the Earth at the speed of light:

c=3.0\cdot 10^8 m/s

Since 1 miles = 1609 metres, the distance covered  by the signal is

d=391\cdot 10^6 mi \cdot (1609 m/mi)=6.29\cdot 10^{11} m

So, the time taken by the signal will be

t=\frac{d}{v}=\frac{6.29\cdot 10^{11} m}{3.0\cdot 10^8 m/s}=2097 s

And since 1 minute = 60 sec, the time taken is

t=2097 s \cdot \frac{1}{60 s/min}\sim 35 min

7 0
3 years ago
Nathan is standing 2 feet away from a plane mirror. Hiva is standing 5 feet further than
Viktor [21]

Answer:

They are standing 3 feet away from each other

Explanation:

If Nathan Is standing 2 feet away from the mirror. Then Hiva is standing 7 feet away from the mirror is she is standing 5 feet further than him. They are standing 3 feet away from each other.

3 0
3 years ago
When a metal rod is heated, its resistance changes both because of a change in resistivity and because of a change in the length
monitta

Answer:

3.34\Omega

Explanation:

The resistance of a metal rod is given by

R=\frac{\rho L}{A}

where

\rho is the resistivity

L is the length of the rod

A is the cross-sectional area

The resistivity changes with the temperature as:

\rho(T)=\rho_0 (1+\alpha (T-T_0))

where in this case:

\rho_0 is the resistivity of silver at T_0=21.0^{\circ}C

\alpha=6.1\cdot 10^{-3} ^{\circ}C^{-1} is the temperature coefficient for silver

T=180.0^{\circ}C is the current temperature

Substituting,

\rho(180^{\circ}C)=\rho_0 (1+6.1\cdot 10^{-3}(180-21))=1.970\rho_0

The length of the rod changes as

L(T)=L_0 (1+\alpha_L(T-T_0))

where:

L_0 is the initial length at 21.0^{\circ}C

\alpha_L = 18\cdot 10^{-6} ^{\circ}C^{-1} is the coefficient of linear expansion

Substituting,

L(180^{\circ}C)=L_0(1+18\cdot 10^{-6}(180-21))=1.00286L_0

The cross-sectional area of the rod changes as

A(T)=A_0(1+2\alpha_L(T-T_0))

So, substituting,

A(180^{\circ}C)=A_0(1+2\cdot 18\cdot 10^{-6}(180-21))=1.00572A_0

Therefore, if the initial resistance at 21.0°C is

R_0 = \frac{\rho_0 L_0}{A_0}=1.70\Omega

Then the resistance at 180.0°C is:

R(180^{\circ}C)=\frac{\rho(180)L(180)}{A(180)}=\frac{(1.970\rho_0)(1.00285L_0)}{1.00572A_0}=1.9644\frac{\rho_0 L_0}{A_0}=1.9644 R_0=\\=(1.9644)(1.70\Omega)=3.34\Omega

7 0
3 years ago
A small pebble and one large boulder start at the same height and begin rolling down the side of a mountain. Which object would
vitfil [10]

Answer:

The small pebble

Explanation:

Since the potential energy, P.E lost equals kinetic energy, K.E gained,

P.E = K.E

P.E = mgh = K.E

So, K.E = mgh where g = acceleration due to gravity and h = height of drop

Since h and g are constant

K.E ∝ m

So, the kinetic energy of the object is directly proportional to its mass. Thus, the object with the smaller mass has the lesser kinetic energy.

Since the object with the smaller mass is the small pebble, so the small pebble would have less kinetic energy as it crashes on the road at the bottom of the mountain.

8 0
3 years ago
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