Fun Fact:

A 250 g block of ice is removed from the refrigerator at -8.0°C. How much thermal energy does the ice absorb as it warms to room

zlopas [31]

Answer:

Q = 114895 J

Explanation:

To find the thermal energy gained by the ice you use the following formula:

$Q=mc(T_2-T_1)+H_f\ m$

m: mass of the ice = 0.250kg

T2: final temperature = 22°C

T1: initial temperature = -8.0°C

Hf: heat of fusion of water = 3.34*10^5 J/kg

c: specific heat of water = 4186 J/kg

By replacing the values of the parameters you have:

$Q=(0.250kg)(4186J/kg\°C)(22+8)\°C+(3.34*10^5 J/kg)(0.250kg)\\\\Q=114895\ J$

where you have considered that ice melts completely

3 0

4 years ago

The planet Jupiter revolves around the Sun in a period of about 12 years (3.79 × 108 seconds). What is its mean distance from th

givi [52]

As we know that gravitational force of Sun will provide the centripetal force to all planets

so here we will have

$F_g = F_c$

$\frac{GMm}{r^2} = m\omega^2 r$

here we know that

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{3.79 \times 10^8}$

$\omega = 1.66 \times 10^{-8}$

now from above equation

$\frac{GM}{r^2} = \omega^2 r$

$\frac{GM}{\omega^2} = r^3$

$\frac{(6.67 \times 10^{-11})(1.99\times 10^{30})}{(1.66\times 10^{-8})^2} = r^3$

$r = 7.8 \times 10^{11} m$

7 0

3 years ago

Question 2 of 10

Leya [2.2K]

Answer:

I would say B. It rids the body of something harmful.

Explanation:

Vomiting usually tries to get rid of something bad in your stomach. If you vomit when your sick its because its trying to get rid of that sickness.

Hope this helps >:3

6 0

3 years ago

For the scenarios in which total internal reflection is possible, rank the scenarios on the basis of the critical angle, the ang

likoan [24]

Answer:

Explanation:

For critical angle C the relation is

SinC = 1 / μ where μ is refractive index of denser medium with respect to rarer medium .

In case of A , refractive index of denser medium with respect to rarer medium .is equal to 1.33 / 1 = 1.33

In case of B , refractive index of denser medium with respect to rarer medium .is equal to 2.42 / 1 = 2.42

In case of C , refractive index of denser medium with respect to rarer medium .is equal to 2.42 / 1.33 = 1.82

In case of D , refractive index of denser medium with respect to rarer medium .is equal to 1.50 / 1.33 = 1.127

In case of D , refractive index is lowest , critical angle will be highest .

In case of B , refractive index of denser medium with respect to rarer medium .is highest so critical angle will be lowest.

Ranking from largest to smallest

D > A >C >B .

3 0

3 years ago

Geology is the science that pursues an understanding of __________.

oee [108]

Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them.

6 0

3 years ago