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tatiyna
3 years ago
6

Use the equation below to solve the problem. s=d÷t A student rode a bicycle 15 miles in 1.5 hours. What was the student's averag

e speed? A 10.0 miles per hour B 13.5 miles per hour C 16.5 miles per hour D 22.5 miles per hour​
Physics
1 answer:
BARSIC [14]3 years ago
5 0

Answer:

A 10.0 miles

Explanation:

S = d/t

S = 15 miles/1.5 hours

S = 10mph = A

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Answer:

C. The compass detects the magnetic field produced by the electric current.

Explanation:

In 1820, Hans Christian Ørsted discovered that a magnetized needle placed in a direction parallel to an electric conductor was deflected when an electric current circulated through the conductor, evidencing the existence of a magnetic field around any conductor crossed by an electric current.

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A car going 72.0 km/h (20.0 m/s) slows down to 36.0 km/h (10.0 m/s) in 5.00 seconds. Calculate the acceleration in
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Answer:

\boxed{\sf Acceleration \ (a) = -2 \ m/s^2}

Given:

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To Find:

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Explanation:

From equation of motion we have:

\boxed{ \bold{v = u + at}}

By substituting value of v, u & t in the equation we get:

\sf \implies 10 = 20 + 5a \\  \\  \sf \implies 5a + 20 = 10 \\  \\  \sf \implies 5a = 10 - 20 \\  \\  \sf \implies 4a =  - 10 \\  \\  \sf \implies a =  -  \frac{10}{5}  \\  \\  \sf \implies a =  - 2 \: m {s}^{ - 2}

\therefore

Acceleration (a) of the car = -2 m/s²

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The physicals properties of a substance can be used to identify the substance, because_
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Physical properties are associated with physical changes.

For example: The physical properties of substances are as follows;

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2. Freezing

3. Vaporization

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