1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ronch [10]
3 years ago
5

HELP ME ASAP PLEASE!!!!!!

Physics
1 answer:
dybincka [34]3 years ago
5 0

Answer:

3. Silver tarnishes when exposed to air and light

Explanation:

Physical properties are properties that change substances in ways that is visible to a human by using their senses (ie. see, touch, etc)

The rest of the answers are chemical properties, which cannot be seen with the human senses, and requires other special devices or techniques to tell.

-Vibilities

You might be interested in
Help Newton’s laws of motion!!!
Licemer1 [7]
Newton’s 3rd law of motion
6 0
3 years ago
A rod attracts a positively charged hanging ball. the rod is?a) negativeb) positivec) neutrald) either negative or neutrale) eit
makvit [3.9K]

Answer:

The correct option is a

Explanation:

This question seeks to test a general rule in physics (on charges) which states that <u>like charges repel but unlike charges attract</u>. This means that, a negatively charged substance will repel or not attract another negatively charged material and the same applies to a positively charged substance also. However, a <u>negatively charged substance will attract a positively charged material and vice versa,</u> hence only a negatively charged rod will attract a positively charged hanging ball.

8 0
4 years ago
Two cars are traveling around identical circular racetracks. Car A travels at a constant speed of 20 m/s. Car B starts at rest a
Tomtit [17]

Answer:

b. it has the same centripetal acceleration as car A.

Explanation:

According to the question, the data provided is as follows

Constant speed of car A = 20 m/s

Constant tangential acceleration until its speed is 40 m/s

Based on the above information, the true statement is the same centripetal acceleration as car A because

As we know that

Centripetal acceleration is

= \frac{V^2}{r}

where,

V^2 = velocity

r = radius of the path

Now if both car A and car B moving in the same or identical circular path having the same velocity so in this case there is the same centripetal acceleration for that particular time

hence, the second option is correct

3 0
4 years ago
A 110 kg football player running with a velocity of 5.0 m/s hits another stationary football
KengaRu [80]

Answer:

The final velocity of the second player is 6.1 m/s.

Explanation:

The final velocity of the second player can be calculated by conservation of linear momentum (p):

p_{i} = p_{f}  

m_{a}v_{a_{i}} + m_{b}v_{b_{i}} = m_{a}v_{a_{f}} + m_{b}v_{b_{f}}  (1)

Where:

m_{a}: is the mass of the first football player = 110 kg

m_{b}: is the mass of the second football player = 90 kg

v_{a_{i}}: is the initial velocity of the first football player = 5.0 m/s

v_{b_{i}}: is the initial velocity of the second football player = 0 (he is at rest)

v_{a_{f}}: is the final velocity of the first football player = 0 (he stops after the impact)

v_{b_{f}}: is the final velocity of the second football player =?

By solving equation (1) for v_{b_{f}} we have:

110 kg*5.0 m/s + 0 = 0 + 90 kg*v_{b_{f}}

v_{b_{f}} = \frac{110 kg*5.0 m/s}{90 kg} = 6.1 m/s

Therefore, the final velocity of the second player is 6.1 m/s.

I hope it helps you!

8 0
3 years ago
Which explains the greenhouse effect?
MatroZZZ [7]
Since greenhouse gases are a main cause of global warming, so the answer must be B.

3 0
3 years ago
Other questions:
  • To find the number of neutrons in an atom, you would subtract
    7·1 answer
  • A 5.58 kg object with a speed of 35 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebo
    10·1 answer
  • Mrs. Harper can't find her car in the school parking lot. She is lost
    7·1 answer
  • --
    10·1 answer
  • An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavie
    8·2 answers
  • How does Newton's third law of motion describe forces?
    13·1 answer
  • Anyone that can help??? ​
    14·1 answer
  • Define potential energy (PE)
    15·2 answers
  • Use the diagram below to answer question #4.
    14·1 answer
  • With full explaniation
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!