How are distance and time related when describing motion?

1 answer:

3 0

an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving

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Unlike most real bulbs, the resistances of the bulbs in the questions below do not change as the current through them changes. A

Shkiper50 [21]

Answer:

Option 1 is correct.

The current passing through the brighter bulb is larger.

Explanation:

The brightness of the bulb is determined by the power, I²R

And since they all have equal resistances, the only factor different that could result in more or less power is the current, I through the bulb.

5 0

4 years ago

Asap

Elan Coil [88]

Answer:

sorry i don't understand

Explanation:

3 0

3 years ago

Read 2 more answers

Sort the questions based on whether they are better answered by an observational study or a controlled experiment.

Zepler [3.9K]

Answer:

Following questions are better answered by observational study:

- How does the daytime temperature affect the formation of dew at night?

- How effective is a new toothpaste in reducing cavities?

Following questions are better answered by controlled experiment:

- Which is a better absorber of heat, an object painted black or the same object painted white?

- Why does a rolling ball slow down as it moves?

- Can plants prepare food even in artificial light?

Explanation:

An observational study is one in which the researcher doesn't manipulate anything.

In a controlled experiment, the researcher manipulate the outcome of the experiment and controls the factors that might affect the experiment to see different results in different conditions.

So, for questions over which research do not have any control, mostly natural processes, observational study is a better option.

However, to check why a rolling ball slow down, controlled experiments are done to find out all the factors.

Plants placed in artificial light is also an controlled experiment as the researcher will himself place the plants in artificial light and keep them away from natural light.

Similarly, to check if color of the object affects the amount of heat absorbed by that object, a controlled experiment must be performed. Same object should be painted white and observed and then painted black and observed.

7 0

3 years ago

Explain temperature gradient

Agata [3.3K]

Explanation:

temperature gradient is a physical quantity that describes in which direction and at what rate the temperature changes the most rapidly around a particular location. The temperature gradient is a dimensional quantity expressed in units of degrees per unit length. The SI unit is kelvin per meter.

6 0

3 years ago

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent

anzhelika [568]

Answer:

The position is $P = 47.4 \ m$ relative to the base of the ocean