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3 years ago

Fresh water _, , and . HELP!!!

Physics

1 answer:

Lady bird [3.3K]3 years ago

5 0

<span>Fresh water, grass, and water.

hope this helps:D</span>

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What type of precipitation would likely be falling from cumulus clouds with a ground air temperature of 14°C?

Alja [10]

Rain would be the type of precipitation likely to be falling from cumulus clouds with a ground air temperature of 14 degrees Celsius. This is because in order for it to be snow it would have to be at or below 0 degrees celsius which is the freezing point.

3 0

4 years ago

What is the resistance of a 15 ampere current with 8 volts of potential difference?

Alex Ar [27]

Answer:

Resistance in circuit = 0.53 ohm (Approx.)

Explanation:

Given:

Flow of current in circuit = 15 amp

Potential difference = 8 Volts

Find:

Resistance in circuit

Computation:

In an electrical system, resistance is a stopper of a material to electric current.

Resistance in circuit = Potential difference / Flow of current in circuit

Resistance in circuit = 8 / 15

Resistance in circuit = 0.53 ohm (Approx.)

8 0

3 years ago

A stone of 1 kg is thrown with a velocity of 40 m/s across the frozen surface of a lake and comes to rest after travelling a dis

yawa3891 [41]

Answer:

C)-16 N

Explanation:

concepts used

force = mass* acceleration

equation of motion

$v^2 = u^2 + 2as$

where v is the final velocity

u is the initial velocity

and s is the distance moved

______________________________________________

Given

mass = 1 kg

initial velocity (u) = 40m/s

final velocity (v) = 0 as stones comes to rest

distance moved by stone (s) = 50m

using $v^2 = u^2 + 2as$

$0 = 40^2 +2a*50\\=> -1600 = 100a\\=> a = -1600/100 = -16$

Thus, acceleration is -16 m/s^2

here acceleration is negative as force of friction is opposing the motion.

Force of friction = mass of stone * acceleration of stone

Force of friction = 1*-16 kgm/s^2 = -16N ( kgm/s^2 = 1 N)

Thus, option c -16N is correct choice.

4 0

3 years ago

5. A 6.0-kilogram mass is moving with a speed of 2.0 m/s. What is the kinetic energy of the mass?

Ann [662]

Answer:

K.E. = ½ × mv²

= ½ × 6 × (2)²

= ½ × 6 × 4

= 3 × 4

= 12 J

3 0

4 years ago

An engine does 25 J of work and exhausts 20 J of waste heat during each cycle. If the cold-reservoir temperature is 30 ∘C, what

hodyreva [135]

Answer:

T₂=659.25 K

Explanation:

Given that

W= 25 J

Qr = 20 J

T₁ = 20⁰ = 20 +273 = 293 K

The minimum temperature of the hot reservoir = T₂

If the engine is Carnot engine then

Qa= W+ Qr

Qa=25 + 20 J

Qa= 45 J

$\dfrac{Qa}{Qr}=\dfrac{T_2}{T_1}$

$T_2=\dfrac{Qa}{Qr}\times T_1$

$T_2=\dfrac{45}{20}\times 293\ K$

T₂=659.25 K

Therefore the temperature of hot reservoir will be 659.25 K

4 0

4 years ago

Fresh water ___________, ________, and __________. HELP!!!

Fresh water _, , and . HELP!!!