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2 years ago

A car is travelling at 70 mph. It travels for half an hour. How far has it gone?

Physics

2 answers:

iren [92.7K]2 years ago

7 0

Explanation:

Since, A car travels = 70 metres per hour

A/Q,

70/2

= 35

Hence, This car travelled 35 metre per half and hour.

( For explanation, 2 was divided by the car's speed. Since, 1 hr = 60mins

Half an Hour = 30 mins ( 30×2)

So, 2 was divided by the speed

rusak2 [61]2 years ago

6 0

Answer:

35 miles

Explanation:

Since half of 70 is 35.....

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a 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above ground). what is the potential energy of the

mart [117]

Here, you can calculate it's potential energy with respect to ground.
We know, U = mgh
Here, m = 75 Kg
g = 9.8 m/s² [ constant value for earth system ]
h = 300 m

Substitute their values into the expression:
U = 75 × 9.8 × 300
U = 220500 J

In short, Your Final Answer would be 220,500 J

Hope this helps!

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2 years ago

a ford explorer traveled 100 miles the next day for 5 hours. What was the average speed of this vehicle?

Bumek [7]

Answer:

25 miles per hour

Explanation:

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2 years ago

Read 2 more answers

What is the relationship between the wavelength of the peak (maximum) of the Gaussian curve and the temperature in degrees Kelvi

Tomtit [17]

Answer:

$\lambda_{max}=\frac{b}{T}$

Explanation:

Wien's displacement law states that the radiation of the black body curve for different temperatures will give peak values at different wavelengths and this wavelength is related inversely to the temperature.

Formally the law of Wien displacement states that the black body's spectral radiation per unit of wavelength, will give peaks at the wavelength of $\lambda_{max}$ which is given by the mathematical expression.

$\lambda_{max}=\frac{b}{T}$

Here, b is proportionality constant with value of $2.897771955...\times 10^{-3} mK$

The wavelength of the peak of the Gaussian curve is inversely related to temperature in degree kelvin.

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2 years ago

An object is dropped from a height h. during the final second of its fall, it traverses a distance of 41.2 m. what was h?

Leya [2.2K]

41.2 = h-1/2g(t-1)^2
 {-h = -1/2gt^2-1/2g+g*t-41.2
 {h = 1/2gt^2
 summing them up
 0 = -1/2g+g*t-41.2
 41.2 +4.9 = g*t
 t = 46.1/9.8 = 4.70 sec
 h = 1/2gt^2 =4.9*(4.70^2) = 108.241 m

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2 years ago

A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 seconds. Wha

olga55 [171]

Answer:

6m/s²

Explanation:

Given parameters:

Initial velocity = 35m/s

Final velocity = 65m/s

Time taken = 5s

Unknown:

Acceleration = ?

Solution:

Acceleration is the rate of change of velocity with time taken;

Acceleration = $\frac{Final velocity - Initial velocity }{time}$

So;

Acceleration = $\frac{65 - 35}{5}$ = 6m/s²

3 0

2 years ago