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aev [14]
2 years ago
13

PLEASE HELP :)

Physics
1 answer:
Tom [10]2 years ago
6 0
1) in the opposite direction always
2) drag force is the force that acts in the opposite direction of the applied force (air resistance if a drag force for example)
3) frictions forces between the sole and the ground as the owner walks
4) chalk would glide very easily, so a creaking sound could never be produced, but also one could not write anything on the board!
5) I apologize for my lack of familiarity with the kind of sport but the probable answer is to raise the friction of their hands in order to decrease slipping and get a tighter, more firm grip
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A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As th
Umnica [9.8K]

Answer:

The frequency of the tuning is 1.065 kHz

Explanation:

Given that,

Length of tube = 40 cm

We need to calculate the difference between each of the lengths

Using formula for length

\Delta L=L_{2}-L_{1}

\Delta L=74.7-58.6

\Delta L=16.1\ m

For an open-open tube,

We need to calculate the fundamental wavelength

Using formula of wavelength

\lambda=2\Delta L

Put the value into the formula

\lambda=2\times16.1

\lambda=32.2\ cm

We need to calculate the frequency of the tuning

Using formula of frequency

f=\dfrac{v}{\lambda}

Put the value into the formula

f=\dfrac{343}{32.2\times10^{-2}}

f=1065.2\ Hz

f=1.065\ kHz

Hence, The frequency of the tuning is 1.065 kHz

3 0
2 years ago
(b) During one day, 250 kg of water is pumped through
ser-zykov [4K]

Answer: The energy incident on the solar panel during that day is 9.24 \times 10^{7} J.

Explanation:

Given: Mass = 250 kg

Initial temperature = 16^{o}C

Final temperature = 38^{o}C

Specific heat capacity = 4200 J/kg^{o}C

Formula used to calculate the energy is as follows.

q = m \times C \times (T_{2} - T_{1})

where,

q = heat energy

m = mass of substance

C = specific heat capacity

T_{1} = initial temperature

T_{2} = final temperature

Substitute the values into above formula as follows.

q = 250 kg \times 4200 J/kg^{o}C \times (38 - 16)^{o}C\\= 250 kg \times 4200 J/kg^{o}C \times 22^{o}C

As it is given that water absorbs 25% of the energy incident on the solar panel. Hence, energy incident on the solar panel can be calculated as follows.

\frac{25}{100} \times q = 250 kg \times 4200 J/kg^{o}C \times 22^{o}C\\q = 9.24 \times 10^{7} J

Thus, we can conclude that the energy incident on the solar panel during that day is 9.24 \times 10^{7} J.

4 0
2 years ago
Which of these is outside of the solar system? sun Saturn galaxy moon
pshichka [43]

Our solar system consists of the sun and the 9 planets and their moons.

The galaxy is outside our solar system.

8 0
2 years ago
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The total distance traveled divided by the time it takes to travel the distance is
Westkost [7]

"The total distance traveled divided by the time it takes to travel the distance"

That's actually a pretty good definition of average speed. <em>(A)</em>

5 0
3 years ago
What type of circuit has little or no resistance?
lions [1.4K]

Answer: A. short circuit

Explanation:

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3 years ago
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