An object is moving to the right, and experiencing a net force that is directed to the right. The magnitude of the force is decreasing with time. The speed of the object is:A. increasingB. constant in timeC. decreasing

Answers

Answer 1

Answer:

Answer:

The speed of the object is increasing.

F = M a as long as the magnitude of the acceleration is acting towards the right there will be an acceleration towards the right

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A child sliding down the slide at a park is an example ofA. positive acceleration
B. negative acceleration
C. no acceleration
D. velocity

Answers

C, no acceleration will occur because he is an object at rest

Our Sun is all of the following EXCEPT ____.a. part of a binary system
c. a yellow star
b. a main sequence star
d. of average absolute magnitude

Answers

Answer:

part of a binary system

Explanation:

Sun is a yellow star, it is a G-type main sequence star. It is yellow dwarf star. It is white but from our earth, it appears yellow. So it is a yellow star.

As mentioned, yes it is a main sequence star.

It is our main part of solar system so it appears to be huge for our earth, however it stands medium in the size among all other billions of stars in the universe.

Sun is solo star, It has no companion star associated with it (as with other stars which have one or more companion star with them making binary or tertiary etc system).

A) Part of a binary system. There is no evidence to suggest that the Sun has a companion star.

What causes light to bend when it moves from one transparent medium to another?a change in amplitude

a change in color

a change in frequency

a change in speed

Answers

Answer:

A change in speed

Explanation:

Light bends when it moves at a particular angle into a medium that has a different refractive index than the one it was coming from.

This bending is as a result of the change in speed of light as it enters the medium with a different refractive index.

This action is known as Refraction of light.

Refraction depends on the change in speed of light as it changes media and the angle of refraction depends on the angle of incidence of the ray of light and the refractive index of the material.

Whenever light goes from transparent to another medium or from rarer to denser medium or vice versa, it's speed changes and hence light bends.

Before you meet with a sexual assault victim, you run through the advocacy steps in your mind. What is the second step of advocacy?

Answers

Before you meet with a sexual assault victim, you run through the advocacy steps in your mind. The second step in advocacy process is to know your audience. It is multi-layered, from policy makers to media to key constituencies to public. Your research should consider whether it is provincial or health authorities or public.

I need help ASAP.The average time that it takes for the car to travel the first 0.25m is_____

The average time to travel just between 0.25m and 0.50m is_____

Given the time taken to travel the second 0.25m section, the velocity would be____m/s

Answers

1. Average time for the first 0.25 m: 2.23 s

Explanation:

The average time that it takes for the car to travel the first 0.25 m is given by the average of the first three measures, so:

$t=(2.24s+2.21s+2.23s)/(3)=2.227 s=2.23 s$

2. Average time to travel between 0.25 m and 0.50 m: 0.90 s

Explanation:

First of all, we need to calculate the time the car takes to travel between 0.25 m and 0.50 m for each trial:

t1 = 3.16 s - 2.24 s = 0.92 s

t2 = 3.08 s - 2.21 s = 0.87 s

t3 = 3.15 s - 2.23 s = 0.92 s

So, the average time is

$t=(0.92 s + 0.87 s + 0.92 s)/(3)=0.903 s=0.90 s$

3. Velocity in the second 0.25 m section: 0.28 m/s

Explanation:

The average velocity in the second 0.25 m section is equal to the ratio between the distance covered (0.25 m) and the average time taken (0.90 s):

$v=(d)/(t)=(0.25 m)/(0.90 s)=0.28 m/s$

Answer:

1. 2.23

2. 0.90

3. 0.28

What experimental evidence was provided for the nuclear model of the atom?

Answers

The correct answer is:

Alpha particles bouncing off gold foil

Explanation:

The nuclear model. Atoms contain three sub-atomic particles termed protons, neutrons, and electrons. The protons and neutrons are determined in the nucleus at the center of the atom. The nucleus is surprisingly much less than the atom as a whole. The Rutherford Gold Foil Experiment conceded the first empirical confirmation that guided to the development of the nucleus of the atom as a small, dense, and positively charged atomic core.

The nuclear model of atom was given by Rutherford. As per this model,the central part of every atom is a massive positive core, and it occupies the total mass of the atom .Around the nucleus, there are orbits in which electrons are revolving just like planets are revolving around the sun.

This evidence was provided by Rutherford's gold foil experiment.

As per this experiment, some alpha particles were deviated at an angle less than 90 degree when allowed to fall on a gold foil.Some alpha particles were deviated more than 90 degree.

One alpha particle out of 10000 particles directly retraced its path back i.e it was deviated at angle of 180 degree.

It is so because alpha particle is positively charged. The alpha particle will be deviated if it will suffer a repulsive force. Hence, the central part of atom is positively charged. As alpha particle comes back, it means the central part is very massive.

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