Answer:
Russia is the largest country in the world covering more than 6.6 million square miles. ... Russia also spreads across two continents, covering a portion of Eastern Europe that borders the Ural Mountains. 4. The country's official name is the Russian Federation.
We got coefficient of
friction uk = 0.51<span>
Mass m = 1500 kg
normal force on the car = weight of the car = 1500 * 9.8 N =
14700 N
and the force of friction on the car, f = uk * normal force =
0.51 * 14700 N = 7497 N
taking Acceleration a = -f/m = -7497/1500 = -4.998 m/s^2
Displacement s = 66 m
Final velocity v = 0
Initial velocity u = ?
v^2 = u^2 + 2as
<span>0 = u^2 - 2 * 4.998 * 66
<span>u = 25.69 m/s </span></span></span>
Volume=length*width*hight 2*5*4=40
p=m/v
p=300/40
p = 7.5 g/cm^<span>3</span>
Answer:
Velocity of rocket will be equal to 7.81 m/sec
Explanation:
We have given mass of the rocket 
Mass of fuel is given 
( As 1 kg is equal to 1000 gram )
Velocity of fuel 
= 625 m/sec
We have to find the velocity of rocket 
From conservation of momentum we know that initial momentum is equal to final momentum '
So 
, here 
is mass of rocket is velocity of rocket 
is mass of fuel and is velocity of fuel
So 
So velocity of rocket will be equal to 7.81 m/sec
Answer: -33.3 * 10^9 C/m^2( nC/m^2)
Explanation: In order to solve this problem we have to use the gaussian law, the we have:
Eoutside =0 so teh Q inside==
the Q inside= 4.6 nC/m*L + σ *2*π*b*L where L is the large of the Gaussian surface and b the radius of the shell.
Then we simplify and get
σ= -4.6/(2*π*b)= -33.3 nC/m^2
