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Luba_88 [7]
3 years ago
6

The doppler effect is sensitive only to motion along the line of sight. a. True b. False

Physics
1 answer:
4vir4ik [10]3 years ago
4 0
Its vey True trust me on this when I say it is
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A 2-kg box sits on a horizontal table. the force of friction between the box and the table is 10 n. the box is pushed to the rig
dangina [55]
By Newton's 2nd law of motion, F = ma, where F is force, m is mass, and a is acceleration.

Rearranging this equation to find acceleration would give us:
a = F/m

The horizontal force to the right is 10N, because the box is pushed to the right with a force of 20N, and the friction force of 10N opposes that, so:
20N - 10N = 10N

The mass is 2kg.

Putting these values into the equation gives us:
a = F/m
= 10/2
= 5ms^-2

The acceleration of the box is 5ms^-2
6 0
3 years ago
HELP PLEASE I need to finish this asap
ELEN [110]

Answer:

I'm not 100% sure, but I think the answer would be the first one because there's a force pushing the object in every direction, so they would cancel eachother out and make the object stay in the same place.

Explanation:

pls vote brainliest

6 0
2 years ago
Read 2 more answers
Isotopes of an element differ in their number of ?
Lera25 [3.4K]

neutrons

Explanation:

Isotopes of an element differ in their number of neutrons.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the  number of neutrons in their nucleus.

  • Isotopes of an element have the same electronic configuration.
  • They have the same chemical properties but differ in their masses.
  • The mass of an atom is function of the protons and neutrons.

Learn more:

Isotope brainly.com/question/2593342

#learnwithBrainly

4 0
2 years ago
If five joules were required to move a crate in 3.7 seconds, what power was applied?
AleksAgata [21]

Answer:

The answer to your question is 1.35 Watts

Explanation:

Data

Work = W = 5 J

time = t = 3.7 s

Power = P = ?

Formula

Power is a rate in which work is done or energy is transferred over time

P = \frac{W}{t}

Substitution

P = \frac{5}{3.7}

Result

P = 1.35 W

8 0
3 years ago
All of the alkali metals, Group 1, have one valence electron. Which of these would represent the oxidation number of the alkali
melamori03 [73]
The elements found in the Group 1, or the Alkali Metal Group, have electronic configurations that end in s^{1}.This means that they have 1 electron readily available to release in order to achieve a stable state. 

When these atoms release the valence electron, they will achieve a stable state. For example, Lithium's stable state will be Li^{+} and Sodium will be Na^{+}. 

The oxidation state will then be +1. 

The answer is C. 


8 0
3 years ago
Read 2 more answers
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