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4 years ago

Convert the value from meters/second to kilometers/hour. One kilometer is equal to 1,000 meters, and 1 hour is equal to

Physics

2 answers:

fiasKO [112]4 years ago

4 0

Answer:

05 m/s =378 km/h

Explanation:

we have to convert the meters per second into kilometers per hour.

1m /sec = (1/1000)/ (1/3600) km/h = 3600/1000 km /h

divide 105 by 1000, and multiply it by 3600.

105 /1000 x 3600 = 378 km/h

Paha777 [63]4 years ago

3 0

Answer:

we must multiply the speed value by 3.6

Explanation:

To reduce a magnitude from one unit to another, it must be multiplied by the equivalence in the order necessary so that the units do not change.

To reduce speed from m / s to km / h

we write the speed and the two conversion factors

v [m / s] [1 km / 1000m] [3600 s / 1h

v 3600/1000

v 3.6

therefore we must multiply the speed value by 3.6

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In a simple electric circuit, a 110-volt electric heater

Readme [11.4K]

Answer: 55 ohms

Explanation:

Given that,

Voltage of heater (v) = 110-volt

Current drawn by heater (I) = 2.0 amperes

resistance of the heater (r) = ?

Since voltage, current and resistance are involved, apply the formula for ohms law.

Voltage = current x resistance

i.e v = ir

where r = v / i

r = 110 volts / 2.0 A

r = 55 ohms

Thus, the resistance of the heater is 55 ohms

6 0

3 years ago

A baseball is thrown horizontally from a cliff at 30 m/s and lands 7 seconds after the baseball was thrown. Calculate the horizo

ASHA 777 [7]

Answer:

The horizontal and vertical distances are x = 210 m and y = -240.35 m, respectively.

Explanation:

Using the equation of the displacement in the x-direction, we have:

(let's recall we have a constant velocity in this direction)

$x=v_{ix}t$

Where:

v(ix) is the initil velocity in the x direction (v(ix) = 30 m/s)
t is the time (t = 7 s)

$x=30(7)$

$x=210\: m$

Now, we need to use the equation of the displacement in the y-direction to find the vertical distance. Here we have an acceleration (g)

$y=v_{iy}t-\frac{1}{2}gt^2$

Where:

v(iy) is the initial velocity at the y-direction. In this case, it will be 0
t is the time
g is the acceleration of gravity (g=9.81 m/s²)

Then, the vertical position at 7 s is:

$y=-\frac{1}{2}(9.81)(7)^2$

$y=-240.35\: m$

Therefore, the horizontal and vertical distances are x = 210 m and y = -240.35 m, respectively. The minus sign means the <u>negative value in the y-direction.</u>

I hope it helps you!

7 0

3 years ago

A carton of 12 rechargable batteries contains one that is defective. In how many ways can the inspector choose 3 of the batterie

atroni [7]

There are 2 defective batteries and 10 good batteries.
a) none of the defective batteries (10C3) = 120
b) one of the defective batteries (10C2)(2C1) = 90

6 0

3 years ago

Which makes better packing material :a high density or density material? Why

Korvikt [17]

High density because it is obvious it will be hard to rip and tear.

3 0

3 years ago

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what causes ocean water near the equator to be warmer than ocean water farther north? a. upwellings spew warm water toward the e

Burka [1]

The structure and curvature of the Earth results in beams of sunlight glancing off the equator and reaching other areas of the Earth. This means that the areas at the equator receive more energy as sun's rays hit them directly.
Therefore, the answer is C.

8 0

3 years ago

Read 2 more answers