Answer : The specific heat of aluminum is, 
Solution : Given,
Heat absorbs = 677 J
Mass of the substance = 10 g
Final temperature = 
Initial temperature = 
Formula used :
or,
Q = heat absorbs
m = mass of the substance
c = heat capacity of aluminium
= final temperature
= initial temperature
Now put all the given values in the above formula, we get the specific heat of aluminium.
Therefore, the specific heat of aluminum is,
The initial speed of the boat is
and its acceleration is
Since the boat is moving by uniform accelerated motion, the distance covered by the boat in a time t=10 s is given by:
So, the boat covers a distance of 350 m in 10 seconds.
The block is ACCELERATING to the left, but there's not enough information to tell which direction it's moving.
Answer:
the acceleration required is 1.37m/s^2
Explanation:
The car is having a constant velocity movement, so if we calculate the time to reach 897m, we can use it to find the acceleration the policeman need to apply to reach the car.
the policeman is traveling with a constant acceleration starting from rest so:
Answer:
B = 0.07 mT
Explanation:
q = 1.6x10^-19 coulombs
for the electron to pass through the field undeflected the magnetic force acting on it must equal the electrical force due to the electric field
electric force = Eq = 16000 * 1.6x10^-19 newtons
magnetic force = qvB = 1.6x10^-19 * 2.7x10^8 * B
16000 * 1.6x10^-19 = 1.6x10^-19 * 2.7x10^8 * B
B = 0.07 mT (milli tesla)
