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murzikaleks [220]
3 years ago
12

Identify the scenario below as to whether they increase, decrease, or not change the frequency in which a string vibrates and th

us change its pitch. Assume that no other changes are happening.
1. Tightening a string for greater tension

2. Replacing a tin string with a thick string

3. increasing the effective length of the string
Physics
1 answer:
telo118 [61]3 years ago
4 0

Answer:1. Increase 2. Decrease 3. Decrease

Explanation:

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2. A car with mass 2,500 kg is travelling at 15 m/s. What is the car's kinetic energy?
BabaBlast [244]

Answer:

c, 280,000J

Explanation:

You should use the equation KE (Kinetic Energy) = \frac{1}{2} mv^2

m = 2500

v = 15

KE = \frac{1}{2} * 2500 * (15)^2\\

KE = 281250 Joules.

This is consistent with the answer B, as all of the parameters given to you are rounded to 2 significant figures so naturally, the answer should also be rounded to 2 sig figs.

KE = 280,000 J

7 0
3 years ago
Edwin Hubble was one of the first scientists to show that galaxies are getter farther apart from each other. (A.) True (B.) Fals
lara [203]
The answer is A: True 


 i hopes this helps :D
5 0
3 years ago
Read 2 more answers
A concrete block is hung from an ideal spring that has a force constant of 100 N/m . The spring stretches 0.129 m .A- What is th
madam [21]

Answer:

1.31498 kg

0.72050 s

0.72050 s

Explanation:

m = Mass of block

g = Acceleration due to gravity = 9.81 m/s²

k = Spring constant = 100 N/M

x = Displacement = 0.129 m

The force balance is

mg=kx\\\Rightarrow m=\dfrac{kx}{g}\\\Rightarrow m=\dfrac{100\times 0.129}{9.81}\\\Rightarrow m=1.31498\ kg

The mass of the block is 1.31498 kg

Time period is given by

T=2\pi\sqrt{\dfrac{m}{k}}\\\Rightarrow T=2\pi\sqrt{\dfrac{1.31498}{100}}\\\Rightarrow T=0.72050\ s

The period of oscillations is 0.72050 s

The time period does not depend on the acceleration due to gravity. It varies with the mass and the spring constant.

Hence, the time period would be the same

8 0
3 years ago
Each of us weighs a tiny bit less on the ground floor of a skyscraper than we do on the top floor. One reason for this is that _
OLga [1]
B. the mass of the building attracts you upward slightly
6 0
4 years ago
1. How much power does a light bulb contain if it does 600J of work in 5 seconds?
dimaraw [331]

Answer:

120 watts

Explanation:

#1: 120 watts

#2: 667 watts

#3: 3 watts

#4: i forgot how to do this one

5 0
3 years ago
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