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
Tresset [83]
3 years ago
6

What do fuel cells, batteries and, solar cells have in common A.the all produce static electricity B. they are all sources of di

rect current C. they are all sources of alternating current D. can all be used to power automobiles
Physics
2 answers:
Svetlanka [38]3 years ago
4 0
B  and  D  are both true.
A  and  C  are both false.
Vaselesa [24]3 years ago
3 0
The correct answer is B :)
You might be interested in
What would be the magnitude of an earthquake 100 km away that produced 100 mm of amplitude
erastovalidia [21]
100000000 mark me brainliest and i will thanks you and rate you5

3 0
3 years ago
Read 2 more answers
What does buoyancy depend on?
natulia [17]
The answer to this is d
7 0
3 years ago
Read 2 more answers
A 2.0 kg book is lying on a 0.78 m -high table. You pick it up and place it on a bookshelf 2.1 m above the floor.Part ADuring th
zloy xaker [14]

Given data:

* The mass of the book is 2 kg.

* The initial height of the book is 0.78 m.

* The final height of the book is 2.1 m.

Solution:

(A). The work done by the gravity on the book is,

W=mg(h_f-h_i)

where m is the mass, g is the acceleration due to gravity, h_i is the initial height and h_f is the final height,

The work is done in moving the object in upward direction where as the gravitational force is acting in the down ward direction. Thus, the value g (acceleration due to gravity) is taken as negative in this case.

Substituting the known values,

\begin{gathered} W=2\times(-9.8)\times(2.1-0.78) \\ W=-19.6\times1.32 \\ W=-25.9\text{ J} \end{gathered}

Thus, the work done by the gravitational force is -25.9 J.

(B). The work done by the hand on the moving the book is,

\begin{gathered} W_1=-W \\ =25.9\text{ J} \end{gathered}

Thus, the work done by the hand on the book is 25.9 J.

7 0
1 year ago
This timeline correctly shows the order of time periods in the Mesozoic Era.
9966 [12]
True

It goes triassic, Jurassic, Cretaceous
7 0
3 years ago
Read 2 more answers
A spring with a spring constant of 2500 n/m. is stretched 4.00 cm. what is the work required to stretch the spring?
Yuri [45]
W = 1/2k*x^2.

k = spring constant = 2500 n/m.
x = distance = 4 cm = 0.04m (convert to same units).

W = 1/2(2500)(0.04)^2 = 2J.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Real life example in which linear motion is not uniform motion.
    14·1 answer
  • If the resistance doubles while the voltage stays the same, what effect will that have on the power?
    12·1 answer
  • What is the accleration of a car that travels 10 meters in 2seconds
    12·1 answer
  • PLEASE HELP ASAP!! 25 POINTS!! how is Earth's surface likely to change along the edges of a bend in a river Channel?
    14·2 answers
  • For a person with a Near Point (NP) = 45 cm, what would be his prescription's lens power = _____________ diopters. A) 0.947368 d
    10·1 answer
  • You drop a rock into a pond, and water waves spread out in circles. (a) The waves carry water outward, away from where the rock
    11·1 answer
  • Question 1
    11·2 answers
  • 1. Which of the following has the least potential energy?
    8·1 answer
  • An electron moves through a region of crossed electric and magnetic fields. The electric field E = 3059 V/m and is directed stra
    6·1 answer
  • Someone help me please !!!! Will mark Brianliest !!!!!!!!!!!!!!!!<br>​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!