Answer:
<h2>15m/s</h2>
Explanation:
Step one:
given data
acceleration a=4m/s^2
final velocity v=35m/s
time t=5 seconds
Step two:
Required
initial velocity u=?
Applying the first equation of motion
v=u+at
substituting we have
35=u+4*5
35=u+20
u=35-20
u=15 m/s
The initial velocity is 15m/s
Answer:
Solar conjunction is the period when Earth and Mars, in their eternal march around the Sun, are obscured from each other by the fiery orb of the Sun itself. Like dancers on either side of a huge bonfire, the two planets are temporarily invisible to each other
According to Newton’s second law acceleration= force/mass
So acceleration = 10/2
= 5m/s^2
Answer:
Ok, the minimal quantity of charge that we can find is on the electron or in the proton (the magnitude is the same, but the sign is different)
Where the charge of a single proton is:
C = 1.6x10^-19 C
Now, you need to remember that when we are working with charges, we are working with discrete math:
What means that?
If the minimum positive is the charge of one proton, then the consecutive charge will be the charge of two protons (there is no somethin in between)
So the consecutive charge will be:
C = 2*1.6x10^-19 C = 3.2x10^-19 C.
So, because we are working in discrete math, we can not have any object that has charge between 1.6x10^-19 C and 3.2x10^-19 C.
Particularly, 2.0x10^-19 C is in that range, so we can conclude that:
No, an object can not carry a charge of 2.0x10^-19 C.
Answer:
Explanation:
Resolving power of telescope
= 1.22 λ / D radian
D is diameter of telescope and λ is wave length of light
This resolving power is in radian
required R .P = 5 / 384000
So
1.22 λ / D = 5 / 384000
D = (1.22 λ x 384000) / 5
= 93696 x λ
= 93696 x 550 x 10⁻⁹
= .0515 m
5.15 cm