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
Elanso [62]
2 years ago
11

Josh tests an unknown liquid substance using litmus paper. When he compared the used litmus paper to a pH scale, the color match

es with a 3.5 of the scale. What kind of substance did Josh test?
Physics
1 answer:
Hunter-Best [27]2 years ago
8 0

Answer:

acid

Explanation:

because ph below 7 is acid

You might be interested in
By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows. The pulley can be tre
tankabanditka [31]

Answer:

Mass of the pull is 77 kg

Explanation:

Here we have for

Since  the rope moves along with pulley, we have

For the first block we have

T₁ - m₁g = -m₁a = -m₁g/4

T₁ =  3/4(m₁g) = 323.4 N

Similarly, as the acceleration of the second block is the same as the first block but in opposite direction, we have

T₂ - m₂g = m₂a = m₂g/4

T₂ =  5/4(m₂g) = 134.75 N

T₂r - T₁r = I·∝ = 0.5·M·r²(-α/r)

∴ M = -\frac{2}{a} (T_2-T_1)

M = -\frac{2}{2.45} (134.75-323.4) = 77 \, kg

Mass of the pull = 77 kg.

5 0
3 years ago
Johannes Kepler, an apprentice of Brahe, believed in the heliocentric universe but rejected past astronomers' belief in
Rashid [163]
<span>So the question is in what did johannes Kepler reject since he believed in the heliocentric universe. So heliocentric system is a system where the sun is in the center of the Solar system. Geocentric system is the system where Earth, not Sun is in the center of our system. He was against Geocentric system. </span>
5 0
3 years ago
Read 2 more answers
Which statement describes a force acting on an object?
Aleonysh [2.5K]

Answer: B. A magnet pulls a nail towards it

Explanation: Out of the list of answers, this is the only answer where a force is acting on an object. the act of the magnet pulling on the nail is the force, and the nail is the object.

7 0
3 years ago
A soft-drink bottler purchases glass bottles from a vendor. The bottles are required to have internal pressure strength of at le
maria [59]

Answer: K =24 psi

Explanation:

Given: Standard deviation =3psi

Internal pressure strength =157psi

Number of random bottle =n=64

K= 3 × square root of 64

K= 3×8=24 psi

If mean internal pressure K fall below K,

157-1.3=155.7psi

At 2%:

0.16×64 = 10.24

5 0
3 years ago
PLEASE HELP!!!!
weqwewe [10]
The answer is A. <span>Some work input is used to overcome friction. </span>
6 0
3 years ago
Other questions:
  • A gasoline engine transform approximately 34 percent of the fuel's chemical energy into mechanical energy. if energy is conserve
    15·1 answer
  • A 2.0-cm-thick bar of soap is floating on a water surface
    10·1 answer
  • How do earths movements affect our view of the star
    15·2 answers
  • How far is the earth from the sun?​
    12·2 answers
  • What do radio waves and microwaves have in common?
    13·2 answers
  • The rate of distance traveled per unit of time, without regard to direction
    11·2 answers
  • 1. What is the primary difference between an ideal emf device and a real emf device? a) The electric potential of a real emf dev
    10·1 answer
  • A golfer strikes a 0.059-kg golf ball with a force of 290 N. If the ball moves with a velocity of 69 m/s,
    15·1 answer
  • In a car, how does an air bag minimize the force acting on a person during a collision?
    11·2 answers
  • Point charge 3.0 μC is located at x = 0, y = 0.30 m, point charge -3.0 μC is located at x = 0 y = -0.30 m. What are (a)the magni
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!