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lana66690 [7]
2 years ago
12

A 1700kg rhino charges at a speed of 50.0km/h. What is the magnitude of the average force needed to bring the rhino to a stop in

0.50s?
Physics
1 answer:
Ksivusya [100]2 years ago
7 0
Force (N) = mass (kg) x velocity (m/s) / time (s)
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The position of an object that is oscillating on an ideal spring is given by the equation x=(12.3cm)cos[(1.26s−1)t]. (a) at time
Natali5045456 [20]
<span>x=((12.3/100)m)cos[(1.26s^−1)t]
 v= dx/dt = -</span><span>((12.3/100)*1.26)sin[(1.26s^−1)t]
 v=</span>-((12.3/100)*1.26)sin[(1.26s^−1)t]=-((12.3/100)*1.26)sin[(1.26s^−1)*(0.815)]
 v=<span> <span>-0.13261622 m/s
 </span></span>the object moving at  0.13 m/s <span>at time t=0.815 s</span>
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2 years ago
Variations in the resistivity of blood can give valuable clues about changes in various properties of the blood. Suppose a medic
Elena-2011 [213]

Answer:

Answer:

1.1 x 10^9 ohm metre

Explanation:

diameter = 1.5 mm

length, l = 5 cm

Potential difference, V = 9 V

current, i = 230 micro Ampere = 230 x 10^-6 A

radius, r = diameter / 2 = 1.5 / 2 = 0.75 x 10^-3 m

Let the resistivity is ρ.

Area of crossection

A = πr² = 3.14 x 0.75 x 0.75 x 10^-6 = 1.766 x 10^-6 m^2

Use Ohm's law to find the value of resistance

V =  i x R

9 = 230 x 10^-6 x R

R = 39130.4 ohm

Use the formula for the resistance

R=\rho \frac{l}{A}

\rho =\frac{RA}{l}

\rho =\frac{39130.4\times 0.05}{1.766\times 10^{-6}}

ρ = 1.1 x 10^9 ohm metre

Explanation:

7 0
2 years ago
Three positively charged particles are positioned as in the diagram below. The charges on the y-axis are 40. cm apart. Determine
tatiyna

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Explanation:

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6 0
2 years ago
A wave has a frequency of 46 Hz and a wavelength of 1.7 meters. What is the wave speed wave?
arlik [135]

Answer:

Explanation:

(1.7 m/cycle)(46 cycle/s) = 78.2 m/s

4 0
2 years ago
Total resistance across any branch of a circuit can be found by analyzing whether the branch is connected in
atroni [7]

Answer: A.

series or parallel

Explanation:

Total resistance across any branch of a circuit can be found by analyzing whether the branch is connected in series or parallel.

The resistors are connected either in series or parallel. Therefore, the resistance of resistors across a circle can be calculated in series and parallel.

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2 years ago
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