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
Gwar [14]
3 years ago
13

PLEASE HELP!!! THANKS I GIVE BRAINLIEST !!A student examines the effect of the number of D batteries in a closed circuit on the

brightness of a light bulb. In the experiment, four circuits were built with 1, 2, 3, and 4 batteries respectively. For each trial, the brightness of the light bulb was measured using a light meter. Which variable should the student keep constant
Physics
1 answer:
kirza4 [7]3 years ago
4 0

Answer:

The batteries

Explanation:

You might be interested in
4: Which of the following is true of an object in a circular motion at a constant speed?
Andre45 [30]
Yes it could. And IT IS !
7 0
3 years ago
A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 24.0 m/s from a height of 3.0 m. (a) H
SashulF [63]

Answer:

a) 29.36 m

b) 2.44 s

c) 2.57 s

d) 25.117 m/s

Explanation:

t = Time taken

u = Initial velocity = 24 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

b)

v=u+at\\\Rightarrow 0=24-9.81\times t\\\Rightarrow \frac{-24}{-9.81}=t\\\Rightarrow t=2.44 \s

Time taken by the ball to reach the highest point is 2.44 seconds

a)

s=ut+\frac{1}{2}at^2\\\Rightarrow s=24\times 2.44+\frac{1}{2}\times -9.81\times 2.44^2\\\Rightarrow s=29.35\ m

The highest point reached by the ball above its release point is 29.36 m

c) Total height is 3+29.35 = 32.35 m

s=ut+\frac{1}{2}at^2\\\Rightarrow 32.35=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{32.35\times 2}{9.81}}\\\Rightarrow t=2.57\ s

The ball reaches the ground 2.57 seconds after reaching the highest point

d)

v=u+at\\\Rightarrow v=0+9.81\times 2.57\\\Rightarrow v=25.2117\ m/s

The ball will hit the ground at 25.2117 m/s

8 0
3 years ago
Meg goes swimming on a hot afternoon. When she comes out of the pool, her foot senses that the pavement is unbearably hot. Suppo
liberstina [14]
B) ask questions. Meg should ask a question first so she can learn more about why the pavement felt so unbearably.
7 0
3 years ago
Read 2 more answers
Which of the following statements best describes earths mineral resources
bulgar [2K]
It is D, you can not replace minerals. This makes them valuable.
8 0
3 years ago
Read 2 more answers
I feel really isolated these days and wish I had more friends. I've chosen to put myself in new social situations to try to make
leva [86]
Behaviorist approach to psychology
3 0
3 years ago
Other questions:
  • _________ is amount of “ground” an object moves from its starting point and __________ is how much “ground” and object covers in
    6·2 answers
  • Older railroad tracks in the U.S. are made of 12-m-long pieces of steel. When the tracks are laid, gaps are left between section
    7·2 answers
  • Explain why Earth does not have as many craters as Mars, Mercury, and the Moon.
    12·1 answer
  • What components must be built to create hydroelectric power?
    14·1 answer
  • What happens to energy and matter when a wave moves through space?
    6·1 answer
  • Light with a single wavelength falls on two slits separated by 0.510 mm. In the resulting interference pattern on a screen 2.24
    6·1 answer
  • Please help<br>What is the angle of the reflected ray in the diagram above?​
    11·1 answer
  • Please help me with science! :,)
    9·1 answer
  • How can you determine the diameter of water
    9·1 answer
  • Use the drop-down menus to complete the statements. Outlook allows users to insert symbols and characters not located on the , b
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!