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3 years ago

Hello could some one please help me wit these

Physics

2 answers:

dedylja [7]3 years ago

3 0

Answer:

1.D 2.A 3.A 4.B 5.C 6.A 7.A 8.A

Explanation:

lisabon 2012 [21]3 years ago

3 0

Answer:

Question one is: kinetic energy

Question two is: tin

Question three is: zinc

Question four is: compression stroke

Question five is: second law of thermodynamics

Question six is: Convection

Question seven is: refrigerater

Explanation:

The next page called use vocabulary

the answers:

Question twenty three is: Heat engine

Question twenty four is: Thermodynamics

Question twenty five is: solar collector

Question twenty six is: specific heat capacity

Question twenty seven is: a conductor

Question twenty eight is: it's total energy increasing

Question thrity is: internal combustion engine

Question thrity one is: Exhaust stroke

Question thrity two is: plastic

Question thrity three: I don't know this one sorry!

Question thrity four is: Temperature

Question thrity five is: Heat

Hope his helps!!! <3

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Newton's first law states that an object traveling with a constant velocity will remain traveling at a constant velocity unless

VikaD [51]

C. The forces on an object traveling at terminal velocity are balanced.

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4 years ago

A boat initially traveling at 10. meters per second accelerates uniformly at the rate of 5.0 meters per second2 for 10. seconds.

guajiro [1.7K]

The initial speed of the boat is $v_0=10 m/s$
and its acceleration is $a=5.0 m/s^2$
Since the boat is moving by uniform accelerated motion, the distance covered by the boat in a time t=10 s is given by:
$S(t)=v_0 t + \frac{1}{2}at^2 = (10 m/s)(10 s)+ \frac{1}{2}(5m/s^2)(10s)^2 =350 m$
So, the boat covers a distance of 350 m in 10 seconds.

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4 years ago

An asteroid, whose mass is 3.6 × 10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is

frosja888 [35]

Answer:

a) 2.02 years

b) 8.1 x 10⁻⁸.

Explanation:

Time period of a rotating body T² is proportional to radius of orbit R³ So

T₁² / T₂² = R₁³ /R₂³ ( T₁ and R₁ is time period and radius of orbit of the earth .)

1² / T₂² =( 1/1.6)³

T₂ = 2.02 years.

Kinetic energy of an orbiting body = 1/2 m v₀² ( v₀ is orbital speed)

= 1/2 m x 2 g R = m x G m/R² X R= m² x G /R

Kinetic energy of asteroid K₁ / kinetic energy of earth K₂ =

(mass of asteroid/mass of earth)² x( radius of earth / radius of asteroid)

=( 3.6 x 10⁻⁴)² x 1/1.6 = 8.1 x 10⁻⁸ .

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3 years ago

On December 26, 2004, a massive Tsunami originated in the Indian Ocean and caused destruction in different parts of the world. W

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3 years ago

You go rock climbing with a pack that ways 79 N and you reach a height of 30 m. How much work did you do to lift your pack? If y

Vanyuwa [196]

When you climb, earth exerts gravitational force on pack in downward direction(pointing towards the center of earth).
In order to climb, you need to work against work done by gravity on the pack.
Hence work done by you = work done by gravity on pack
= Force x displacement = 70 x 30 = 2100 J.

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3 years ago