Answer:The reading on the scale is 64.76kg
Explanation:
According to Newton's 3rd law,when a person exerts a force on a plane,the plane simultaneously exerts a force equal in magnitude and opposite.
Given: mass=70kg ,alpha= 22.3°
Mg=mg×cos alpha= 70kg× cos22.3°=
70× 0.9252= 64.76kg
The reading on the scale is 64.76kg
Answer:
three balls have the same speed
Explanation:
In a parabolic motion we have that
but the time just before the balls hit the ground is
Hence we have
ball A
ball B
ball C
Hence, all three balls have the same speed just before hit the groug
vA=vB=vC
I hope this is useful for you
regards
Answer:
2.5 x 10⁻⁹ m
Explanation:
E = Energy of photon = 500 eV = 500 x 1.6 x 10⁻¹⁹ J
c = speed of photon = 3 x 10⁸ m/s
λ = wavelength of photon = ?
Energy of photon is given as
inserting the values
λ = 2.5 x 10⁻⁹ m
Answer:
Explanation:
The sensor contains an LDR which has a resistance of 10kohlms in daylight and 100kohlms in the dark.
If the resistor in the circuit is 1 megaohlm, the total resistance in daylight and darkness will be 1.01 megaohms and 1.1 megaohlms.
The percentage difference = (1.1-1.01)/1.1*100% = 8.18%
If the resistor in the circuit is 25 kohlm, the total resistance in daylight and darkness will be 35 kohms and 125 kohlms.
The percentage difference = (125-35)/125*100% = 72%
With the input p.d to the sensing circuit fixed at 12 v, the sensing current will change according to the total resistance. A 72% difference is much more detectable. So the 25 kohm resistor is the better choice.
Answer:
Explanation:
From the given information, we are to compare the minimum energies required to remove a neutron from , and
To start with ; the minimum energy required to remove a neutron from is :
=
= (38156.36 - 37225.15 -939.57) MeV
= -8.36 MeV Since energy is being given out
Thus, E = 8.36 MeV
the minimum energy required to remove a neutron from is :
=
= ( 39084.46 - 38156.36 - 939.57) MeV
= -11.47 MeV Since energy is being given out
Thus, E = 11.47 MeV
the minimum energy required to remove a neutron from is :
=
= (40016.10 -39084.46 -939.57) MeV
= - 7.93 MeV Since energy is being given out
Thus, E =7.93 MeV
Why there is a distinct increase of this energy for ?
This is as a result of electronic configuration of which posses the same number of proton and neutron, as such, tends to acquire more stability. For this reason, it will be difficult to remove a neutron from .