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frutty [35]
3 years ago
9

A car travels a distance of 540km in 6 hours. What speed did it travel at?

Physics
2 answers:
maria [59]2 years ago
4 0

Speed v = distance travelled / time taken

v = d / t

v =  540 / 60h

v =   9 km /h

const2013 [10]2 years ago
4 0

The speed of the car that travels a distance of 540km in 6 hours is 90km/hr

Explanation:

Given:

Distance the car travels =540km

Time taken by the car to travel 540 km= 6 hours

To Find:

Rate at which the car travels=?

Solution:

\text { formula for speed }=\frac{\text { distance }}{\text { time }}

Substituting the known values,

\text { formula for speed }=\frac{\text {distance}}{\text {time}}

\text { formula for speed }=\frac{540}{6}

\text { formula for speed }=90 \mathrm{km} / \mathrm{hr}

Thus the  speed of car is 90 \mathrm{km} / \mathrm{hr}

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A sound wave with a frequency of 400 Hz is moving through a solid object. If the wavelength of the sound wave is 8 m, what is th
Paraphin [41]

Answer:

v = 3200 m/s

Explanation:

As we know that the frequency of the sound wave is given as

f = 400 Hz

wavelength of the sound wave is given as

\lambda = 8 m

so now we have

speed = wavelength \times frequency

so we will have

v = (8m) \times (400 Hz)

v = 3200 m/s

4 0
3 years ago
A 295-kg object and a 595-kg object are separated by 4.10 m.
kodGreya [7K]

Answer:

a)F=3 x 10⁻⁷ N

b)x=2.405 m

Explanation:

Given that

m₁=295 kg

m₂=595 kg

d= 4.1 m

a)

m₃=63 kg

r=d/2 = 2.05 m

The force between the mass m₁ and m₃

F_{13}=\dfrac{Gm_1m_3}{r^2}

by putting the values

F_{13}=\dfrac{Gm_1m_3}{r^2}

F_{13}=\dfrac{6.67\times 10^{-11}\times 295\times 63 }{2.05^2}

F₁₃=2.94 x 10⁻⁷ N

The force  between the mass m₂ and m₃

by putting the values

F_{23}=\dfrac{Gm_2m_3}{r^2}

F_{23}=\dfrac{6.67\times 10^{-11}\times 595\times 63 }{2.05^2}

F₂₃=5.94 x 10⁻⁷ N

The net force F

F= F₂₃- F₁₃

F=5.94 x 10⁻⁷ N-2.94 x 10⁻⁷ N

F=3 x 10⁻⁷ N

b)

Lest take at distance x from mass m₂ net force is zero.

F_{23}=\dfrac{Gm_2m_3}{x^2}

F_{13}=\dfrac{Gm_1m_3}{(4.1-x)^2}

Form above two equation

\dfrac{Gm_1m_3}{(4.1-x)^2}=\dfrac{Gm_2m_3}{x^2}

\dfrac{m_1}{(4.1-x)^2}=\dfrac{m_2}{x^2}

\dfrac{295}{(4.1-x)^2}=\dfrac{595}{x^2}

x²=2.01(4.1-x)²

x=1.42 (4.1-x)

x=5.82 - 1.42x

x=2.405 m

4 0
2 years ago
Can someone help me with this ASAP
Lilit [14]

4. B Mantle. 5. C Solid.

Explanation:

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8 0
2 years ago
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A student sees a newspaper ad for an apartment that has 1730 square feet (ft2) of floor space. How many square meters of area ar
SVETLANKA909090 [29]

The correct answer for this question is 160.89 m².

The square footage of a newspaper ad for an apartment is = 1730ft²

We know that one square foot equals 0.093 square meters.

We can determine the area in square meters using the above conversion.

Total square meters = 0.093×1730ft² (or) 1730÷10.7 

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6 0
1 year ago
WILL GIVE THAT CROWN THINGY!
lbvjy [14]

Answer:

Mechanical energy is the sum of the potential and kinetic energies in a system. The principle of the conservation of mechanical energy states that the total mechanical energy in a system remains constant as long as the only forces acting are conservative forces.

Explanation:

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2 years ago
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