Answer:
d) Radon has the highest number of protons (it has 86 protons)
Explanation:
Here, We know, Density = Mass / Volume
Here, mass = 249.8 g
volume = 92.5 cm³
Substitute their values,
d = 249.8 / 92.5
d = 2.7 g/cm³
In short, Your Answer would be "Aluminum"
Hope this helps!
Answer:
Neptune
Explanation:
"Answer: Pluto is usually farthest from the Sun. However, its orbit "crosses" inside of Neptune's orbit for 20 years out of every 248 years. Pluto last crossed inside Neptune's orbit on February 7, 1979, and temporarily became the 8th planet from the Sun.
"
Source:https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question5.html
Answer: 1.2 seconds
Explanation:
Initial velocity =u=13.9m/s
Acceleration due to gravity=g=9.8m/s^2
Φ=25°
Time=t
T=(2 x u x sinΦ) ➗ g
T=(2 x 13.9 x sin25) ➗ 9.8
T=(2 x 13.9 x 0.4226) ➗ 9.8
T=11.75 ➗ 9.8
T=1.2 seconds