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3 years ago

4. During which three months is the difference the same between average high temperature and average low temperature?

Physics

1 answer:

kkurt [141]3 years ago

6 0

Answer:

1 Inch and 20 F

Explanation:

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A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s while comin

Daniel [21]

Answer:

1.53 g

Explanation:

Given,

Initial speed = 30 m/s

Final speed = 0 m/s

Period of stretch, t = 2 s

average deceleration = ?

we know

$a = \dfrac{v-u}{t}$

$a = \dfrac{0-30}{2}$

a = -15 m/s²

Deceleration of the jumper = 15 m/s²

Deceleration in terms of g

$= \dfrac{15}{9.81}$

$= 1.53\ g$

Hence, the deceleration of the jumper is equal to 1.53 g

7 0

3 years ago

A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by

Natalka [10]

Answer:

The ball and the wall experience the same force.

Explanation:

According to the third law of Newton, which states that "for every action, there is an equal and opposite reaction", this means that when an object 1 acts on object 2 with a certain force, object 2 also acts on object 1 with the same magnitude of force but in an opposite direction.

According to this question, a ball hits a wall with a certain force. This means that the wall will react on the ball with the same force magnitude, but in an opposite manner. Hence, the ball and the wall experience the same force.

6 0

3 years ago

4. A spring is stretched 0.5 m from equilibrium. The force constant (k) of the

makkiz [27]

Answer:

31.25

Explanation:

The formula for the potential energy of a spring is $\frac{1}{2}kx^2$ , where x is the distance in meters the spring is stretched. Plugging in the numbers that you are given, you get $\frac{1}{2}\cdot 250\cdot 0.25=31.25$ . Hope this helps!

8 0

3 years ago

Read 2 more answers

Physics help, thank you guys so much!

katrin2010 [14]

Answer:

Δt = 5.85 s

Explanation:

For this exercise let's use Faraday's Law

emf = $- \frac{d \phi}{dt}$ - d fi / dt

$\phi$ = B. A

\phi = B A cos θ

The bold are vectors. It indicates that the area of the body is A = 0.046 m², the magnetic field B = 1.4 T, also iindicate that the normal to the area is parallel to the field, therefore the angle θ = 0 and cos 0 =1.

suppose a linear change of the magnetic field

emf = - A $\frac{B_f - B_o}{ \Delta t}$