Answer:
c
Explanation:
a vector quantity has both magnitude and direction
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Explanation:
Answer:
(a) Work done by the tension force is 987 J
(b) Coefficient of kinetic friction between the crate and surface is 0.495
Explanation:
(a)
Work done by any force F in moving an object by a distance d making an angle
with the direction of force is given by


Thus work done by the tension force is 987 J
(b)
Normal force on the crate is given by

=>N=332 Newtons
Since crate is moving with constant speed . Therefore using Newtons second law .

Where
=coefficient of kinetic friction

=>
=>
Thus coefficient of kinetic friction between the crate and surface is 0.495
Answer:

Explanation:
It is given that,
The frequency of monochromatic light, 
Slit separation, 
Let
is the angle away from the central bright spot the third bright fringe past the central bright spot occur. The condition for bright fringe is :

n = 3


So, at 4.64 degrees the third bright fringe past the central bright spot occur. Hence, this is the required solution.
Answer:
Answer:- Volume of the balloon is 5.78 L.
Solution:- There are 0.24 moles of hydrogen gas in a balloon at 35 degree C and 1.05 atm pressure. It asks to calculate the volume of the balloon.
This problem is based on ideal gas law equation:
P = 1.05 atm, n = 0.24 mole, T = 35 + 273 = 308 K
R =
V = ?
The equation could be rearranged for the volume as:
Let's plug in the values and do the calculations to get the volume of the balloon:
V = 5.78 L
So, the volume of the gas balloon is 5.78 L.