Answer:
True
Explanation:
The centripetal force is directed towards the center of the circle at any moment. Also, the acceleration.
- Centripetal force is a force needed to keep an object along the curved path of a circular body.
- A motion in a curved path requires a force directed towards to center to keep it.
- A constant force is require to maintain the acceleration of a body along this path.
Explanation:
spectral lines or signatures of elements depend on temperature, the temperature of the sun is about 5800 K.
at this temperature most calcium atoms are excited to higher energy states than hydrogen atoms and this means that calcium atoms are gonna have more signatures than the atoms of hydrogen.
the statement that the sun shows weak hyrogen lines and strong calcium line is wrong because at the sun's temperature most of the hydrogen atoms are in lower energy states while calcium atoms are in higher energy states hence calcium has more or ''strong'' lines than hydrogen.
Answer:
60km/hr due east
Explanation:
Given parameters:
Displacement = 60km East
Start time = 10am
End time = 11am
Unknown:
Average velocity = ?
Solution:
The average velocity is the displacement divided by the time taken.
For this journey, the time taken is;
11am - 10am = 1hr
So;
Average velocity = 
= 60km/hr due east
Answer:
P=11.126 atm
Explanation:
We are given that a compressed gas cylinder containing 1.50 mol methane
Volume of methane in a gas cylinder =3.3 L
Temperature =
We have to find the pressure exert by gas on cylinder
Using ideal gas equation
PV =nRT
Where R= gas constant=0.0821 L-atm/K mol
Substitute all given values
Then we get
P=11.126 atm
Hence, the pressure exert by the gas on cylinder =11.126 atm
Answer:
139.6m/s
Explanation:
Calculate the tension first, T=m*g
mass(m): 1750kg, gravity(g): 9.8m/s^2
T= 1750*9.8
=17150N
Then calculate the wave speed using the equation v = √ (T/μ)
v= √(17150N)/(0.88kg/m)
=139.6m/s
