Draw a diagram to show how two resistors R1 and R2 are connected in parallel.

One object has a negative charge. The other object has a positive charge.

Kamila [148]

Answer:

attract each other

Explanation:

attract each other, opposite charges attract each other, similar charges repel.

5 0

2 years ago

An airplane pilot sets a compass course due west and maintains an airspeed of 210 km/h. After flying for a time of 0.490 h, she

tankabanditka [31]

Answer:

$V_{A/E}=55.23km/h\\or\\V_{A/E}=15.342m/s$

Explanation:

The velocity of plane relative to earth is given by:

$V_{P/E}=\frac{d}{t}\\V_{P/E}=\frac{[-121i-20j]km}{0.490h} \\V_{P/E}=[-247i-41j]km/h$

As the from given data.The velocity of plane relative to air is:

$V_{P/A}=[-210i]km/h$

According to relative motion of velocity of the air relative to earth given by:

$V_{A/E}=V_{P/E}-V_{P/A} \\V_{A/E}=[(-247i-41j)km/h]-(-210i)km/h\\V_{A/E}=[-37i-41j]km/h\\$

The magnitude is given as:

$V_{A/E}=\sqrt{(37)^{2}+(41)^{2} }\\ V_{A/E}=55.23km/h\\or\\V_{A/E}=15.342m/s$

5 0

2 years ago

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Alyssa is carrying a water balloon while running down a field at a speed of 14 m/s. She tosses the water balloon forward toward

Luda [366]

From Alyssa's point of view, the water balloon is at first at rest and then gets thrown with a velocity of 23m/s. Therefore the balloon will have a speed of 23m/s for Alyssa.

At the same time, Naya is watching, and she sees the balloon at the beginning moving at a speed of 14m/s along with Alyssa, and then pushed forward of other 23m/s. Therefore, from her point of view, the balloon will have a speed of 14+23 = 37m/s.

Hence, the correct answer is D) The speed of the balloon is 23 m/s for Alyssa and 37 m/s for Naya.

4 0

2 years ago

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you and a friend sit still on a spinning merry-go-round. The merry-go-round spins 5 times every second, and to a stationary obse

dedylja [7]

Answer:

From your frame of reference, the speed of your friend is zero.

Explanation:

The speed from a frame of reference is the magnitude of the change of the position per unit of time in that frame of reference.

When it is said that, to a stationary observer you have a speed of 9m/s, it means that the observer "measures" tha your position, in a moment, changes 9 m per second.

Since both you and your friend are sit still on the same spinning merry-go-round, neither of you will change positions with respect to the other, meaning that you will perceive that your friend will not move, from your frame of reference. That is, if you are isolated from the rest of the universe, and the merry-go-round continues spining uniformly, you cannot detect any movement of your friend, which means that from your frame of reference, the speed of your friend is zero.

4 0

2 years ago

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A student on the ground observes the sun just as it sets. His friend, who is located 100 meters higher up in a tall building, te

FrozenT [24]

Answer:

Rt≅6377Km

Explanation:

Take a look at the image. The horizontal line is the horizon, and the angle α corresponds to the earth rotation during the 77 seconds.

With this information, we can know the value of α:

α = $\alpha= \frac{77s}{1day}*\frac{1day}{24H}*\frac{1H}{60min}*\frac{1min}{60s}*2*\pi =0.0056rad$