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Pie
3 years ago
7

Zaiden and lisa are testing music effects on plants

Physics
1 answer:
USPshnik [31]3 years ago
5 0

Answer:

Anymore information?

Explanation:

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a 20 of of ice at 0c is dropped into water at boiling point, specific heat capacity of water =4200 J/kg•c, sepesific latent heat
Contact [7]

Answer:

15 KJ

Explanation:

The quantity of heat (Q) required is given as:

Q = mcΔθ + mL

where m is the mass of ice, c is its specific heat capacity, L is its specific latent heat andΔθ is the change in temperature.

Given: m = 20g, temperature of ice = 0^{o} C, specific heat capacity of water = 4200 J/kg^{o} C, latent heat of fusion of ice = 3.3 x 10^(5) J/kg, temperature of water = 100^{o} C.

Q = m (cΔθ + L)

   = 0.02(4200 x (100) + 330000)

   = 0.02(420000 + 330000)

  = 0.02 (750000)

Q = 15000

Q = 15000 Joules

Q = 15KJ

The quantity of heat needed to complete the conversion is 15 KJ.

4 0
3 years ago
A 3 kg bowling ball is thrown onto a mattress. If it takes 0.3 seconds to stop the ball using a force of 24 N, what was the init
enyata [817]

Answer:

-24 m/s

Explanation:

mass of the bowling ball =  3 kg

time (t) = 0.3 seconds

Force = 24 N

initial velocity u = ???

We know that;

Force = mass × acceleration (a)

So;

24 = 3 × a

a = 24/3

a = 8 m/s²

Also;

From equation of motion; acceleration is given by the relation;

a =\frac{v-u}{t}

if v = 0

then ;

8 = \frac{0-u}{0.3}

24 = 0- u

u = -24 m/s

Thus; the  initial velocity of the bowling ball when it first touched the mattress =  -24 m/s

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4 years ago
Running is probably the simplest individual sport for promoting both health-related and skill-related fitness.
Tamiku [17]

Answer:

Running is probably the simplest individual sport for promoting both health-related and skill-related fitness. Fencing is often referred to as "mental chess" because it requires dexterity, endurance, and discipline. Individual sports require the coach to make all of the decisions for the athlete.

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What is the ultimate source of energy for an ecosystem?
Romashka-Z-Leto [24]

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Obviously the answer is Sun...

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Part C
ivanzaharov [21]

Answer:

the other colours get absorbed by the paper

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3 years ago
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