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alexdok [17]
4 years ago
11

Which one of the following types of training involves 10 to 30 minutes of high-intensity exercise?

Physics
2 answers:
Goshia [24]4 years ago
5 0

Correct answer choice is:



C. Medium range



Explanation:



Medium range exercises are used to gain extra strength and fitness. Usually, heavyweights are used with less number of repetitions. These sort of exercises are mostly the hardest t do. All you need is to have a high level of motivation and stamina, which can be gained by running or cycling.

Evgen [1.6K]4 years ago
4 0

Answer:

c. medium range

Explanation:

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A particle is at the position (x,y,z) = (1.0, 2.0, 3.0) m. it is traveling with a vector velocity (-5.3, -4.8, -3.9) m/s. its ma
Alisiya [41]
<1, 2, 3> x (7.6 <-5.3, -4.8, -3.9>) x stands for cross product 

What does the above notation mean? 

Multiply 7.6 to each component of the velocity vector to obtain the linear momentum vector. Find the cross product of the position vector and the linear momentum vector. That gives you the angular momentum vector.

7.6 * -5.3 = -40.28
7.6 * -4.8 = -36.48
7.6 * -3.9 = -29.64

Cross Multiplication
-40.28   1 = -80.56 - (-36.48)
-36.48   2   

-40.28   1 = -120.84 - (-29.64)
-29.64   3    

-36.48   2 = -109.44 - (-59.28)
-29.64   3

answer is (-91.2) - (50.16) + 117.04 = -24.32
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This allows the vehicle to complete the turn.
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Which best explains why no current is induced? The wire needs to be coiled less tightly. The wire needs to be straight, not coil
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The magnet needs to be held above the coils of wires

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A hiker walks 2.00 km north and then 3.00 km east, all in 2.50 hours. Calculate the magnitude and direction of the hiker’s (a) d
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Answer:

Incomplete third question

I think it should be

C. What was her average speed

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Check attachment for solution

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3 years ago
2000, the Millennium Bridge, a new footbridge over the River Thames in London, England, was opened to the public. However, after
sweet [91]

Answer:

n = 1810

A = 25 mm

Explanation:

Given:

Lateral force amplitude, F = 25 N

Frequency, f = 1 Hz

mass of the bridge, m = 2000 kg/m

Span, L = 144 m

Amplitude of the oscillation, A = 75 mm = 0.075 m

time, t = 6T

now,

Amplitude as a function of time is given as:

A(t)=A_oe^{\frac{-bt}{2m}}

or amplitude for unforce oscillation

\frac{A_o}{e}=A_oe^{\frac{-b(6T)}{2m}}

or

\frac{6bt}{2m}=1

or

b=\frac{m}{3T}

Now, provided in the question Amplitude of the driven oscillation

A=\frac{F_{max}}{\sqrt{(k-m\omega_d^2)+(b\omega_d^2)}}

the value of the maximum amplitude is obtained (k=m\omega_d^2)

thus,

A=\frac{F_{max}}{(b\omega_d}

Now, for n people on the bridge

Fmax = nF

thus,

max amplitude

0.075=\frac{nF}{((\frac{m}{3T})2\pi}

or

n = 1810

hence, there were 1810 people on the bridge

b)A=\frac{F_{max}}{(b\omega_d}

since the effect of damping in the millenium bridge is 3 times

thus,

b=3b

therefore,

A=\frac{F_{max}}{(3b\omega_d}

or

A=\frac{1}{(3}A_o

or

A=\frac{1}{(3}0.075

or

A = 0.025 m = 25 mm

6 0
3 years ago
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