The two substances must be in contact with each other.
Answer:
V = 3.97 m/s
Explanation:
Mass of a man, M = 85 kg
Mass of a bullet, m = 8 g = 0.008 kg
Speed of bullet, v = 410 m/s
We need to find the speed of a man in order to have the same kinetic energy as that of the bullet. Let the kinetic energy of the bullet is k. So,
Since, k = K (K is the kinetic energy of the man and Let V is the speed)
So, the speed of the man is 3.97 m/s.
Answer:
Explanation:
the electric field between the plates is uniform and given by
E⃗ =(120N/C) j
So electric field is along y - axis
Force on electron
F_y = 1.6 x 10⁻¹⁹ x 120
a_y ( acceleration )= ( 1.6 x 10⁻¹⁹ / 9.1 x 10⁻³¹ ) x 120
a_y = 21.1 x 10¹²
a = 21.1 x 10¹² j
time to reach x = 2 cm = 2 x 10⁻² m
t = 2 x 10⁻² / 2.5 x 10⁵
= .8 x 10⁻⁷
= 8 x 10⁻⁸ s
velocity along y axis after time 8 x 10⁻⁸ s
= u + at
= 5 x 10³ + 21.1 x 10¹² x 8 x 10⁻⁸
= 5 x 10³+ 168.8 x 10⁴
= .05 x 10⁵ + 16.88 x 10⁵
= 16.93 x 10⁵
resultant velocity
= √( 2.5 x 10⁵ )² + ( 16.93 x 10⁵)²
= 17.11 x 10⁵ m /s
Answer:
True
Explanation:
The number density of an ideal gas at stp is called the loschmidt number, being named after the Austrian physicist Johann Josef Loschmidt who first estimated this quantity in 1865
n =
where is the Boltzman constant
T is the temperature
P is the pressure
Loschmidt Number is the number of molecules of gas present in one cubic centimetre of it at STP conditions.Loschmidt constant is also used to define the amagat, which is a practical unit of number density for gases and other substances:
1 amagat = n = 2.6867811×1025 m−3,
The specific heat of a metal or any element or compound can be determined using the formula Cp = delta H / delta T / mass. delta pertains to change. That is change in enthalpy and change in temperature. From the given data, Cp is equal to 343 cal per (86-19) c per 55 grams. This is equal to 0.093 cal / g deg. Celsius