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kondaur [170]
3 years ago
15

What is the tangent function used to find and what are its units

Physics
1 answer:
Verizon [17]3 years ago
7 0
The functions of angles are used to find unknown lengths or angles that can't be measured, in terms of known quantities. The trig functions of angles are ratios of lengths, so they're bare naked numbers without units.
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A 57 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. The acceleration of
kari74 [83]

Answer:

Her altitude as she crosses the bar, h₂ is approximately 6.1 m

Explanation:

The given parameters of the motion of the pole vaulter are;

The mass of the pole vaulter, m = 57 kg

The speed with which the pole vaulter is running, u = 11 m/s

The speed of the pole vaulter when she crosses the bar, v = 1.1 m/s

The acceleration due to gravity, g = 9.8 m/s²

From the total mechanical energy, M.E. equation, we have;

M.E. = P.E. + K.E.

Where;

P.E. = The potential energy of the motion = m·g·h

K.E. = The kinetic energy of the motion = 1/2·m·v²

By the principle of conservation of energy, we have;

The change (loss) in kinetic energy, ΔK.E. = The change (gain) in potential energy, ΔP.E.

ΔK.E. = 1/2·m·(v² - u²)

ΔP.E. = m·g·(h₂ - h₁)

Where;

h₁ = The ground level = 0 m

h₂ = The altitude with which she crosses the bar

∴ 1/2·m·(v² - u²) = m·g·(h₂ - h₁)

(h₂ - h₁) = (v² - u²)/(2·g) = (11² - 1.1²)/(2·9.8) = 6.11173469388

h₂ = 6.11173469388 + h₁ = 6.11173469388 + 0 = 6.11173469388

h₂ = 6.11173469388

Her altitude as she crosses over the bar, h₂ ≈ 6.1 m.

3 0
3 years ago
Starting from rest on a level road a girl can reach a speed of 5 m/s in 10s on her bicycle. Find average speed and distance trav
Mice21 [21]

Answer:

Average speed = 2.5 mph

Distance = 22.352 meters

Explanation:

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

You can use this formula for any question like this

8 0
2 years ago
In an oscillating LC circuit, the total stored energy is U and the maximum current in the inductor is I. When the current in the
Deffense [45]

Answer:

The definition of that same given problem is outlined in the following section on the clarification.

Explanation:

The Q seems to be endless (hardly any R on the circuit). So energy equations to describe and forth through the inducer as well as the condenser.  

Presently take a gander at the energy stored in your condensers while charging is Q.

⇒  U =\frac{Qmax^2}{C}

So conclude C doesn't change substantially as well as,

When,

⇒  Q=\frac{Qmax}{2}

⇒  Q^2=\frac{Qmax^2}{4}

And therefore only half of the population power generation remains in the condenser that tends to leave this same inductor energy at 3/4 U.

5 0
3 years ago
Calculate the amount of heat required to completely sublime 40.0 g of solid dry ice (co2) at its sublimation temperature. the he
Mashcka [7]

The amount of heat required for the sublimation of 40.0 g of solid dry ice CO₂ is <u>29.3 kJ.</u>

One mole of CO₂ has a mass of 44.0095 g.

Calculate the number of moles  n in 40.0 g of CO₂ .

n =\frac{40.0 g}{44.0095 g/mol}  = 0.9089 mol

Heat of sublimation is the amount of heat required by 1 mole of a substance to convert itself from solid state to a vapor state at constant temperature and pressure.

1 mole of CO₂ requires 32.3 kJ of energy to sublimate.

Therefore, the heat required to sublimate 0.9089 mol of CO₂ is given by,

Q = (32.3 kJ/mol)(0.9089 mol) =29.3 kJ

Thus, the heat required to sublimate 40.0 g of CO₂ is <u>29.3 kJ</u>.


8 0
3 years ago
How can i better study to better prepare for exams
ira [324]
Organize your study space. ...
Use flow charts and diagrams. ...
Practice on old exams. ...
Explain your answers to others. ...
Organize study groups with friends. ...
Take regular breaks. ...
Snack on brain food. ...
Plan your exam day.
Just plain study..
6 0
3 years ago
Read 2 more answers
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