Answer:
4.9 m/s
Explanation:
Since the motion of the ball is a uniformly accelerated motion (constant acceleration), we can solve the problem by using the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance covered
For the ball in this problem,
u = 0 (it starts from rest)
is the acceleration
s = 3 m is the distance covered
Solving for v,
Answer:
271cm^2
Explanation:
volume 1= 15^3 =3375
temp. 1. = 20+273 = 293
temp. 2. = 50+273 = 353
volume 2 =?
According to Charles law
volume is proportional to temperature
v2 = v1 * t2 / t1
v2 = 3375 * 353 / 293
v2 = 4066cm^3
v = area * length
4066 = area * 15
area = 4066/15 = 271cm^2
Answer:
Explanation:
On the rod , three forces are acting .
1 ) its weight from the middle point .
2 ) Tension in the wire in the horizontal direction
3 ) reaction force by the hinge which balances the other two forces
Now taking moment of forces acting on the rod about the hinge
and equating opposite moment
3.7 x 9.8 x .6 x cos 25 = T x .51 ( T is tension in the horizontal wire)
T = 38.6 N
a )
The horizontal component of the force exerted on the rod by the hinge
will balance the tension in the wire acting in horizontal direction so it will be equal to
38.6 N
b ) The vertical component of the force exerted on the rod by the hinge
will balance the weight of rod so it will be equal to
3.7 x 9.8 N
= 36.26. N
=
Answer:
The following statements are true
B) The resistance of a conductor is proportional to the resistivity of the material of which the conductor is composed.
C) A material that obeys Ohm's law reasonably well is called an ohmic conductor or a linear conductor.
D) Good conductors of electricity have larger conductivity values than insulators.
Explanation:
i believe it is c but i could be wrong. (i’m sorry if i am)
