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V125BC [204]
3 years ago
9

Got stuck on question 3 need help please

Physics
1 answer:
natita [175]3 years ago
7 0
A. Decreasing negatively, velocity is constant
B. Object at rest, velocity is zero
C. Decreasing negatively, velocity is constant
D. Increasing positively, velocity is constant
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Which sequence shows electromagnetic waves arranged in a decreasing order of their wavelengths?
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Answer: Gamma rays, x-rays, ultraviolet rays, visible light, and infrared rays.

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A vertical spring stretches 4.0 cm when a 12-g object is hung from it. The object is replaced with a block of mass 28 g that osc
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Answer:

Time period of the osculation will be 0.0671 sec  

Explanation:

It is given a vertical spring is stretched by 4 cm

So change in length of the spring x = 4 cm = 0.04 m

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Sprig force will be equal to weight of the mass

So kx=mg

k\times 0.04=0.012\times 9.8

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Now new mass is m = 28 gram = 0.028 kg

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T=2\pi \sqrt{\frac{m}{k}}

=2\times 3.14 \sqrt{\frac{0.028}{244.7}}=0.0671sec

4 0
3 years ago
A baseball has a mass of 0.145 kg. A professional pitcher throws a baseball 67 mi/h, which is 30.0 m/s. What is the magnitude of
Kamila [148]

The concept of momentum tells us that it is equivalent to the product between the mass and the velocity of the object, that is to say that in general it can be written as

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6 0
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Nana76 [90]

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