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fomenos
3 years ago
8

A 40N force is applied to a spring constant of 100 N/m how far can this spring be compressed by the force

Physics
1 answer:
Firdavs [7]3 years ago
4 0

Answer:

Extension, e = 0.4 meters

Explanation:

Given the following data;

Force = 40N

Spring constant, k = 100N/m

To find the extension;

Force = spring constant * extension

Substituting into the equation, we have

40 = 100 * extension

Extension, e = 40/100

Extension, e = 0.4 meters

Therefore, the spring can be compressed by the force over a distance of 0.4 meters.

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Which of the following statements are true? Check all that apply.
stiks02 [169]

Answer:

B,C

Explanation:

In the law of magnetism, like poles repel and unlike poles attract. The north and South Pole attracts which makes B correct. The north and north or south and south poles repel.

In a compass ,the north end of a magnet is attracted to the south magnetic pole which is in close proximity to the geographic South Pole. This makes

Option c correct.

8 0
3 years ago
A bus with a vertical wind shield moves horizontally
Katena32 [7]

Answer:

(3) 53°

Explanation:

We want to measure the angle that the rains form with the vertical wind shield, so we have to measure the angle relative to the vertical. This means that we can write the following equation

tan \theta = \frac{v_x}{v_y}

where

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v_x = 40 km/h is the speed of the bus, which travels horizontally

Substituting, we find

\theta=tan^{-1}(\frac{40}{30})=53^{\circ}

8 0
3 years ago
Which of these would be a good model to demonstrate the fact that the galaxies are moving apart as the universe is expanding?
Sergio [31]

Answer: Option A: The spots on the balloon move away as the balloon is inflated.

one of the scientific models describes the galaxies are moving apart as the universe is expanding. This expansion theory came from the observation of red-shifted spectrum from all the directions indicating that the galaxies are moving away.  This can be understood from the inflated balloon. Initially spots can be marked using a colored pen on the balloon.On inflating the balloon, it would be noticed that the spots on the balloon move away. Actually the position of the spots won't change, but the distance between the spots would expand. This is a good model to explain the expanding universe. The galaxies are neither moving in any random direction nor moving forward. So, rest of the options are not good models to explain the theory.

3 0
3 years ago
About how many electrons are in 30 grams of water (H2O)?
jarptica [38.1K]

Hydrogen (H) has a molar mass of about 1.007 g/mol and has 1 electron.

Oxygen (O) has a molar mass of about 15.999 g/mol and has 8 electrons.

Then water (H₂O) has a total molar mass of about 18.015 g/mol and has 10 electrons.

30 g of water is the mass of

(30 g) × (1/18.015 mol/g) ≈ 1.66528 mol

of water. Recall that 1 mole is around 6.022 × 10²³ molecules (i.e. Avogadro's number). So 30 g of water is the mass of approximately 1.00285 × 10²⁴ molecules of water.

If each molecule contains 10 electrons, then 30 g of water contains 1.00285 × 10²⁵ ≈ 10²⁵ electrons.

5 0
3 years ago
Two different wave groups with the same height travel together in the same direction. The wavelength of one group is twice as lo
Morgarella [4.7K]

Answer:

A combined wave of extra height will produce every other wave.

Explanation:

One wave Crest can catch up to another wave Crest if the group of waves are from different places.

Here the two group of waves have different wavelength but travelling together in the same direction so when they combine,they will produce every other wave.

8 0
4 years ago
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