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serg [7]
3 years ago
6

Select the correct answer.

Physics
1 answer:
Bess [88]3 years ago
3 0

Answer:

C

Explanation:

V-V₀=at

a=(V-V₀)/t

a=(10-20)/5=-2 m/s²

Acceleration of the car is -2 m/s²

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When a circuit is arranged in parallel
attashe74 [19]

Answer:

A. There are multiple paths that electrons can take through the circuit, and it is possible for the electron to pass through one circuit component but not another.

Explanation:

Parallel arrangement of components in an electric circuit puts different parts of the circuit on different branches. In a parallel connection, there are multiple paths for the electrons to take, and it is possible for electrons to pass through on circuit component without going through another. This is the reason why If there is a break in one branch of the circuit, electrons can still flow in other branches, and the same reason why one bulb going off in your home does prevent the other components in your home from coming on (your home is wired in a parallel electric circuit).

5 0
3 years ago
The legs of a weight lifter must ultimately support the weights he has lifted. A human tibia (shinbone) has a circular cross sec
Sergio039 [100]

Answer:

249003822308.05008 N

Explanation:

F = Force

\sigma = Breaking stress of bone = 150 MPa

d_2 = Outer diameter = 3.6 cm

d_1 = Inner diameter = 2.3 cm

Area of the bone is assumed to be a hollow cylinder

A=\dfrac{\pi}{4}(d_2^2-d_1^2)

Stress is given by

\sigma=\dfrac{F}{A}\\\Rightarrow F=\sigma A\\\Rightarrow F=\dfrac{150\times 10^6}{\dfrac{\pi}{4}(0.036^2-0.023^2)}\\\Rightarrow F=249003822308.05008\ N

The maximum weight the person can lift without breaking his legs is 249003822308.05008 N

3 0
4 years ago
To what height, h, would the pendulum bob rise after a single swing if it was being released from the height of 0.80 m
babunello [35]

Answer:

0.80 m

Explanation:

Neglecting friction, the total mechanical energy of the pendulum is constant.

E = K + U where K = kinetic energy and U = potential energy.

At its release point of 0.80 m, the pendulum bob has a mechanical energy which is equal to its potential energy, since, its initial kinetic energy is zero. By the time the bob swings to the other end, it has a mechanical energy equal to it initial potential energy since total energy is conserved.

Neglecting friction, the pendulum bob would swing back to its original height of 0.80 m since the total mechanical energy is conserved and at its highest point, it is purely potential energy.

So, the height the pendulum bob swings to after release from a height of 0.80 m neglecting fiction is 0.80 m.

5 0
3 years ago
2. What is the final velocity of an object that is traveling at 5.0 m/s and accelerates at
Elena L [17]

Answer:

22.74 m/s

Explanation:

u= 5.0

a= 2.4

t= 7.39

Therefore the final velocity can be calculated as follows

v = u + at

v= 5 + 2.4(7.39)

v= 5 + 17.736

v= 22.74 m/s

Hence the final velocity of the object is 22.74 m/s

3 0
4 years ago
How to solve a kinetic energy problem
cricket20 [7]

Answer:

you can solve kinetic energy problem by using, Ke=1/2MV² where m is mass and v is velocity

8 0
4 years ago
Read 2 more answers
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