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
3241004551 [841]
3 years ago
5

which of the following are good conductors under normal conditions? A. Penny B.copper wire C. a dime D.plastic E.aluminum foil F

.water
Physics
2 answers:
Anvisha [2.4K]3 years ago
5 0

Answer:

see explanation

Explanation:

A,B,C,E

professor190 [17]3 years ago
3 0

B.

Because its copper

You might be interested in
_ acceleration occurs when an object speeds up.<br> Answer<br> Positive
Nina [5.8K]

_ acceleration occurs when an object speeds up.

Answer

Positive

6 0
3 years ago
Read 2 more answers
How much heat do you need to raise the temperature of 150 g of oxygen from -30c to -15c?
Naddika [18.5K]
The amount of heat needed to raise the temperature of a substance by \Delta T is given by
Q=m C_s \Delta T
where
m is the mass of the substance
Cs is its specific heat capacity
\Delta T is the increase in temperature

For oxygen, the specific heat capacity is approximately 
C_s = 0.92 J/(g K)
The variation of temperature for the sample in our problem is 
\Delta T= -15^{\circ}C-(-30^{\circ} C)=+15^{\circ}C=15 K
while the mass is m=150 g, so the amount of heat needed is
Q=m C_s \Delta T=(150 g)(0.92 J/g K)(15 K)=2070 J
4 0
3 years ago
Read 2 more answers
A 75kg hockey player is skating across the ice at a speed of 6.0m/s. What is the magnitude of the average force required to stop
liq [111]

Answer:

692.31 N

Explanation:

Applying,

F = ma............... Equation 1

Where F = Average force required to stop the player, m = mass of the player, a = acceleration of the player

But,

a = (v-u)/t............ Equation 2

Where v = final velocity, u = initial velocity, t = time.

Substitute equation 2 into equation 1

F = m(v-u)/t............ Equation 3

From the question,

Given: m = 75 kg, u = 6.0 m/s, v = 0 m/s (to stop), t = 0.65 s

Substitute these values into equation 3

F = 75(0-6)/0.65

F = -692.31 N

Hence the average force required to stop the player is 692.31 N

6 0
2 years ago
1. An excited lithium atom emits a red light with wavelength a = 671nm. What is the corresponding photon energy? hc (6.63 x 10-3
Rudiy27

Answer:

 E = 2,964 10⁻¹⁹ J

Explanation:

The energy of the photons is given by the Planck relation

          E = h f

the speed of light is related to wavelength and frequency

          c = λ f

we substitute

          E = h c /λ

let's reduce the magnitude to the SI system

          λ = 671 nm = 671 10⁻⁹ m

let's calculate

          E = 6.63 10⁻³⁴ 3 10⁸ /671 10⁻⁹

          E = 2,964 10⁻¹⁹ J

6 0
3 years ago
A magnet can attract or repel another magnet from a distance true or false?
Anuta_ua [19.1K]
False the strength off the magnet lessens the farther you get from it
6 0
3 years ago
Read 2 more answers
Other questions:
  • The rotational speeds of four generators are listed in RPM (revolutions per minute). Arrange the generators in order based on th
    13·2 answers
  • Which of the following is not a unit used to measure pressure?
    10·2 answers
  • Explain why atmospheric pressure changes as atmospheric depth changes
    13·1 answer
  • Francis Bacon created a new way of scientific thinking called inductive reasoning. How was this different from the deductive rea
    9·2 answers
  • You are designing a system for moving aluminum cylinders from the ground to a loading dock. You use a sturdy wooden ramp that is
    14·2 answers
  • Two current-carrying wires are exactly parallel to one another and both carry 2.5A of current. The two wires are separated by a
    15·1 answer
  • How do you calculate an<br> object's displacement?
    13·2 answers
  • Ice of mass 5 g at 0 °C melts to water at 0 °C.
    13·1 answer
  • The process of blood cell formation is called
    7·1 answer
  • a___of water a. of bread a. of soap a. of juice a. salt. a. sand a. of glass a. of corn fill in the blanks I follow him but righ
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!