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
Rus_ich [418]
3 years ago
8

Does a material have less mass when it has contracted?

Physics
1 answer:
Lyrx [107]3 years ago
8 0

Answer:No

Explanation:The amount of mass is the amount of matter in an object if it is contracted the mass stays the same, it is just more dense

You might be interested in
What kind of gas is fart
mihalych1998 [28]
The answer is methamphetamine
3 0
3 years ago
Read 2 more answers
7. A beam of light converges at a point P. Now a lens is placed in the path of the convergent
Rudiy27

Answer:

Lens at a distance = 7.5 cm

Lens at a distance = 6.86 cm  (Approx)

Explanation:

Given:

Object distance u = 12 cm

a) Focal length = 20 cm

b) Focal length = 16 cm

Computation:

a. 1/v = 1/u + 1/f

1/v = 1/20 + 1/12

v = 7.5 cm

Lens at a distance = 7.5 cm

b.  1/v = 1/u + 1/f

1/v = 1/16 + 1/12

v = 6.86 cm  (Approx)

Lens at a distance = 6.86 cm  (Approx)

5 0
3 years ago
Is it possible to calculate the displacement based on an elapsed time from a position time graph?
Nataly [62]
No I don’t think so. But it worth a try tho. Try it out.
5 0
3 years ago
An inventor claims to have developed a power cycle having a thermal efficiency of 40%, while operating between hot and cold rese
lesya [120]

From Carnot's theorem, for any engine working between these two temperatures:


efficiency <= (1-tc/th) * 100


Given: tc = 300k (from question assuming it is not 5300 as it seems)

For a, th = 900k, efficiency = (1-300/900) = 70%

For b, th = 500k, efficiency = (1-300/500) = 40% 

For c, th = 375k, efficiency = (1-300/375) = 20% 


Hence in case of a and b, efficiency claimed is lesser than efficiency calculated, which is valid case and in case of c, however efficiency claimed is greater which is invalid. 

7 0
3 years ago
Your roommate drops your wallet down to you from the third-floor window of your apartment, which is 11.5 m from the ground. What
Aneli [31]

Answer:

15 m/s

Explanation:

Using the law of conservation of energy, potential energy equals kinetic energy hence

mgh=0.5mv^{2}

Therefore

v=\sqrt{2gh}

where g is the acceleration due to gravity, m is the mass of the object, h is the height and v is the speed of the wallet

Taking g as 9.81 then

v=\sqrt{2\times 9.8\times 11.5}=15.02098532  m/s\approx 15 m/s

6 0
3 years ago
Other questions:
  • One property that makes electromagnetic waves differ from other types of waves is that they can
    12·2 answers
  • From a set of graphed data the slope of the best fit line is found to be 1.35 m/s and the slope of the worst fit line is 1.29m/s
    12·1 answer
  • Stars that become black holes have more __________ than stars that become neutron stars
    14·2 answers
  • The unit used to measure electric current is the ampere (A). Now, assume that the current delivered at a wall socket reaches the
    5·1 answer
  • When Maggie applies the brakes of her car, the car slows uniformly from 15.3 m/s to 0 m/s in 2.23 s. How far ahead of a stop sig
    9·1 answer
  • The derived unit for density are g/cm3.<br><br> True<br> False
    12·1 answer
  • What is a sentence for crater
    11·2 answers
  • 1+5-(-5 - 1) whats the answer​
    14·2 answers
  • PLEASE HELP FAST!!!
    9·1 answer
  • What is the main organ of the circulatory system?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!