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elena-s [515]
3 years ago
15

What is the spring constant for a supermarket scale that stretches 0.01 m when a force of 4 N is applied

Physics
1 answer:
bija089 [108]3 years ago
5 0

Answer:

400N/m

Explanation:

K = F/x

= 4/0.01

= 400 N/m

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Find the mass of a 165 N child
Alexeev081 [22]

Answer:

F=ma

165=m*9.8

m=16.6kg

8 0
2 years ago
For the wave of light you generated in the Part B, calculate the amount of energy in 1.0 mol of photons with that same frequency
Angelina_Jolie [31]

Answer:

2.7 J

Explanation:

The energy of one photon is given by

E=hf

where

h is the Planck constant

f is the frequency

For the photons in this problem,

f=6.8\cdot 10^9 Hz

So the energy of one photon is

E_1=(6.63\cdot 10^{-34})(6.8\cdot 10^9 )=4.5\cdot 10^{-24} J

The number of photons contained in 1.0 mol is

N_A = 6.022\cdot 10^{23} mol^{-1} (Avogadro number)

So the total energy of N_A photons contained in 1.0 mol is

E=N_A E_1 =(6.022\cdot 10^{23})(4.5\cdot 10^{-24})=2.7 J

3 0
3 years ago
A car collides into a concrete wall going 25.0 m/s . It stops in 0.141 seconds and has a change in momentum of 39,400. What is t
vodka [1.7K]

Answer:

Mass of the car is 1576 kg.

Explanation:

Let the mass of the car be m kg.

Given:

Initial velocity of the car is, u=25\ m/s

As the car stops, final velocity of the car is, v=0\ m/s

Change in momentum is, \Delta p=39400

Now, we know that, momentum is given as the product of mass and velocity.

So, change in momentum is given as:

\Delta p=m(u-v)\\39400=m(25-0)\\39400=25m\\m=\frac{39400}{25}\\m=1576\ kg

Therefore, the mass of the car is 1576 kg.

4 0
3 years ago
The two types of glaciers are the U type which is found in the Rocky Mountains, and the L type which can be found in Switzerland
Arturiano [62]
THE ANSWER IS TRUE
Have a nice day
4 0
3 years ago
When passing another vehicle you are allowed to exceed the speed limit by?
lesantik [10]
If the other driver is going speed limit you can't pass him but if he's going slower than the limit you have to go in the left lane i'm not sure by how much i'll guess 5mph<span />
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3 years ago
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