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AlekseyPX
3 years ago
8

What two units of measurement are necessary for describing speed

Physics
1 answer:
Lunna [17]3 years ago
3 0

Answer:

speed has the dimensions of distance divided by time the SI unit of speed is the metre per second but the most common unit of speed in everyday usage is the kilometre per hour or in the US and the UK miles per hour for air and marine travel the knot is commonly used

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What role do hair cells play in hearing?
NikAS [45]
Cochlea- <span>the part of the inner ear that contains the endings of the nerve that carries information about sound to the brain.</span>
6 0
3 years ago
Each of two small non-conducting spheres is charged positively, the combined charge being 40 μC. When the two spheres are 50 cm
Phantasy [73]

Answer:

1.44 x 10⁻⁶ C

Explanation:

q_{1} = charge on one sphere

q_{2} = charge on other sphere

q = Total charge on the two spheres = 40 μC

q_{1}+ q_{2} = q

q_{1}+ q_{2} = 40 x 10⁻⁶

q_{1} = (40 x 10⁻⁶) - q_{2}                                   eq-1

r = distance between the two spheres = 50 cm = 0.50 m

F = magnitude of force between the two spheres = 2.0 N

Magnitude of force between the two spheres is given as

F = \frac{k q_{1} q_{2}}{r^{2}}

2.0 = \frac{(9\times 10^{9}) ((40\times 10^{-6}) - q_{2}) q_{2}}{0.50^{2}}

q_{2} = 1.44 x 10⁻⁶ C

7 0
3 years ago
You went 100 miles north and 14
skad [1K]

Answer:

82 degrees

Explanation:

consider your staying point to be the center of a circle. this center has the coordinates (0, 0).

the radius of the circle is the distance you walked East (14 miles).

I assume your teacher means as "angle of displacement" the angle between the East-West line going through your starting point and the direct line from your starting point to your current position.

then the 100 miles North is tan(displacement angle)×14.

as it is the same, if you first went North and then East, or the other way around. you end up at the same point, with the same coordinates.

so, again.

100 = 14×tan(angle)

tan(angle) = 100/14 = 50/7 = 7.142857...

the displacement angle is then 82 degrees.

5 0
3 years ago
The amount of force needed to cause an object to accelerate depends upon
Tasya [4]

Answer:

A

Explanation:

I have read the information

4 0
3 years ago
Which of the following materials is likely to be the best conductor?
Tomtit [17]
Iron is the best conductor in this group.
6 0
4 years ago
Read 2 more answers
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