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2 years ago

10

I'm not even sure if this is the right category but here we go. All my points and brainliest. I'm counting on you guys.

1 answer:

zlopas [31]2 years ago

7 0

Answer:

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.

Explanation:

Brainliest???

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Please help ASAP will mark brainliest How do we find the amount of uncertainty we should expect in our measurement of the period

kicyunya [14]

Answer:

The relative uncertainty gives the uncertainty as a percentage of the original value. Work this out with: Relative uncertainty = (absolute uncertainty ÷ best estimate) × 100%. So in the example above: Relative uncertainty = (0.2 cm ÷ 3.4 cm) × 100% = 5.9%. The value can therefore be quoted as 3.4 cm ± 5.9%.

Explanation:

hope it helps :)

4 0

2 years ago

A backpacker walks for 3 days in the mountains and covers 16 km. How fast was he walking in km/hr?

Fudgin [204]

Answer:

0.22 km/h

Explanation:

72 hours in 3 days

16/72 = 0.222222222

round to 0.22 km/h

For future reference, Distance/Time= Speed

5 0

2 years ago

A fourth-grade teacher wants to ensure students understand the life cycle process of plants. The teacher decides to incorporate

Annette [7]

Answer:

There are several options that the teacher can use to incorporate the concept into students' understanding.

Explanation:

1. The students can draw all the plants that they know.

2. Children can be asked to bring the flowers to school so that they can identify the plants themselves.

3. The children can plat the flowers in makeshift pots and then take the best plants and transplant them in the garden or elsewhere.

4. The children can take occasional trips and observe and record any changes to the plants.

4. The teacher can ask the students to draw the flowers and emphasize on the productive parts like the stamens, leaves, pistils, stems.

4 0

2 years ago

A 5.0 kg box is sliding across a waxed floor by the application of a 15 N east force. If the force of friction is 2.5 N west, wh

coldgirl [10]

1) 12.5 N east

There are two forces acting on the box along the horizontal direction:

- The applied force of 15 N east, we indicate it with F

- The force of friction of 2.5 N west, we indicate it with $F_f$

Taking east as positive direction, we can write the two forces has

$F=+15 N\\F_f = -2.5 N$

Therefore, the net force on the box will be:

$F_{net} = F + F_f = 15 + (-2.5) = +12.5 N$

And the positive sign means the direction is east.

2) $2.5 m/s^2$

We can solve this part by using Newton's second law:

$F_{net}=ma$

where

$F_{net}$ is the net force on the box

m is its mass

a is the acceleration

For the box in this problem,

$F_{net} = 12.5 m/s^2$ (east)

m = 5.0 kg

Solving for a, we find the acceleration:

$a=\frac{F_{net}}{m}=\frac{12.5}{5.0}=2.5 m/s^2$

And the direction is the same as the net force (east)

6 0

3 years ago

पुस्तक विक्रेता ने वीपीपी द्वारा आपको पुस्तक भेजी है?? धन्यवाद देते हुए पत्र लिखिए।

Xelga [282]

Answer:

y e s :))))))))))))))))))))))))))))))))

Explanation:

y - dirdf leter of di alfabet

3 0

2 years ago