3 years ago

Heat is also called

2 answers:

7 0

Heat is also called thermal energy because thermal is a synonym of the word heat. Heat is produced with the other energies but thermal energy is called that

Mrac [35]3 years ago

6 0

Thermal energy (any word that begins with therm has to do with heat)

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vlabodo [156]

Answer:

0.918 seconds

Explanation:

M = 2kg

V = 9.0 m/s

g = 9.8 m/s

F = Mg cosΘ

Θ = 0°

But F = Ma

a = v / t

F = m*v / t

Mv / t = mg cos0

V / t = g

t = v / g

t = 9.0 / 9.8

t = 0.918s

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densk [106]

The answer is A

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4 years ago

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A toy rocket is launched straight up by using a spring. The rocket is initially pressed down on the spring so that the spring is

Delvig [45]

Answer:

B.6.86 m

Explanation:

Given that

Compression in spring ,x= 9 cm

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Mass of the rocket ,m= 50 g = 0.05 kg ( 1 kg = 1000 g)

Now by applying energy conservation

$\dfrac{1}{2}Kx^2=mgh$

$h=\dfrac{1}{2\times mg}kx^2$

Now by putting the values ( we are taking g= 9.81 m/s²)

$h=\dfrac{1}{2\times 9.81\times 0.05}\times 830\times 0.09^2$

h= 6.853 m

Therefore the answer is B.

B.6.86 m

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3 years ago