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laiz [17]
3 years ago
6

you push a shopping cart with 2 packs of water bottles. you stop the cart and add two more packs. you push the cart again. does

the cart behave differently? explain using science terms.​
Physics
1 answer:
HACTEHA [7]3 years ago
4 0

Answer:

Yes

Explanation:

The cart will definitely behave differently because more weight is added to it.

In order to successfully push a cart, the applied force must exceed the force of the weight of the cart along with its constituents and the frictional force between the tyres and the floor.

<em>When more weights are added (the 2 packs of water bottles), it means that more force would be needed to overcome the opposing forces to the movement of the cart in order to successfully push the cart again.</em>

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What is the energy (in evev) of a photon of visible light that has a wavelength of 500 nmnm?
lisabon 2012 [21]
<h3>Answer:</h3>
  • E≈2,5 eV
<h3>Explanation:</h3>

_______________

λ=500 nm = 500·10⁻⁹ m

c=3·10⁸ m/s

h=6,63·10⁻³⁴ J·s = 4,14·10⁻¹⁵ eV·s

_______________

E - ?

_______________

\displaystyle \boldsymbol{E}=h\nu =h \frac{c}{\lambda} =4,14\cdot 10^{-15} \; eV\cdot s\cdot \; \frac{3\cdot 10^8\; m/s}{500\cdot 10^{-9}\; m} =2,484\;  eV\approx \boldsymbol{2,5\; eV}

6 0
2 years ago
If heat Q is required to increase the temperature of a metal object from 4 ∘C to 7∘C, the amount of heat necessary to increase i
alisha [4.7K]

Answer:

4Q

Explanation:

Case 1 :

m = mass of the metal

c = specific heat of the metal

\Delta T = Change in temperature = 7 - 4 = 3 C

Amount of heat required for the above change of temperature is given as

Q = m c \Delta T\\Q = m c (7 - 4)\\Q = 3 m c

Case 2 :

m = mass of the metal

c = specific heat of the metal

\Delta T = Change in temperature = 19 - 7 = 12 C

Amount of heat required for the above change of temperature is given as

Q' = m c \Delta T\\Q' = m c (12)\\Q' = (4)(3 m c)\\Q' = 4Q

Hence the correct choice is

4Q

6 0
3 years ago
Read 2 more answers
Please please help
Feliz [49]

Answer:

D

Explanation:

5 0
2 years ago
I just need an answer ASAP
nikdorinn [45]

Answer: c

Explanation: hope this helps :)

8 0
3 years ago
Read 2 more answers
The motion of spinning a hula hoop around one's hips can be modeled as a hoop rotating around an axis not through the center, bu
Citrus2011 [14]

Answer and Explanation:

Based on the given information, the formula and the computation is given below:

a. The rotational inertia of the hoop is shown below:

I_H = I_R + Mh^2

= MR^2 + Mh^2

= 0.73 \times (0.60^2 + 0.38^2)

= 0.73 × (0.36 +  0.1444)

= 0.368 kg\ mg^2

b. Now the rotational kinetic energy is

= Half \times Inertia \times omega^2

= 0.5 \times 0.368 \times 14.1^2

= 36.58 J

We simply applied the above formula for rotational inertia and rotational kinetic energy in order to reach with the correct answer

6 0
3 years ago
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