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
Anika [276]
2 years ago
11

Enny and Anne wanted to see who could throw a ball the hardest. They decided to each throw a ball against a wall as hard as they

could and measure how far the ball rolled away from the wall.
Out of the variables that need to be controlled in this experiment, propose how you might control them.
Physics
1 answer:
mihalych1998 [28]2 years ago
4 0

Answer:

wha t kind of variables

independent variables

dependent variables

controled variables

You might be interested in
Which letter on the diagram below represents the trough of a wave?
Nikitich [7]

A would be the wavelength, C would be a crest, D would be the amplitude, leaving B which is the trough.

8 0
2 years ago
Read 2 more answers
How is temperature related to the physical change of a substance?
WINSTONCH [101]
When you heat something of cool it down you don't change the substance you might change the why is looks, but it is still the same substance. For example you cool water to 0 degrees Celsius it turns into ice but it still is two parts hydrogen and one part oxygen H2O. Physical changes will change state and/or form but it will still be what it originally was on the molecular level. Hope that helped. 
8 0
2 years ago
Read 2 more answers
A small rock is thrown vertically upward with a speed of 21.0 m/sm/s from the edge of the roof of a 21.0-mm-tall building. The r
FromTheMoon [43]

Answer:

Explanation:

A.

Given:

Vo = 21 m/s

Vf = 0 m/s

Using equation of Motion,

Vf^2 = Vo^2 - 2aS

S = (21^2)/2 × 9.8

= 22.5 m.

B.

Given:

S = 22.5 + 21 mm

= 22.521 m

Vo = 0 m/s

Using the equation of motion,

S = Vo × t + 1/2 × a × t^2

22.521 = 0 + 1/2 × 9.8 × t^2

t^2 = (2 × 22.521)/9.8

= 4.6

t = 2.14 s

4 0
3 years ago
a lamp rated 100w 220 v is connected to mains electric supply . what current is drawn from the supplyy line, if the voltage is 2
melomori [17]
Power = (voltage) x (current)

100w = 220v x current

Current = 100w / 220v = <u>0.455 Ampere</u> (rounded)
5 0
3 years ago
What net external force is required to give a 25 kg suitcase an acceleration of 2.2 m/s2 to the right?
lapo4ka [179]

Answer:

there are two way to get mate  and i gave them sepaert explation

Explanation:

55

N

Explanation:

Using Newton's second law of motion:

F

=

m

a

Force=mass

×

acceleration

F

=

25

×

2.2

F

=

55

N

So 55 Newtons are needed.

Answer link

Nam D.

Apr 6, 2018

55

N

Explanation:

We use Newton's second law of motion here, which states that,

F

=

m

a

m

is the mass of the object in kilograms

a

is the acceleration of the object in meters per second

F

=

25

kg

⋅

2.2

m/s

2

=

55

N

3 0
2 years ago
Other questions:
  • A transformer for a laptop computer converts a 120-V input to a 24-V output. If the output current for the transformer is 1.8 A,
    15·1 answer
  • Twin sisters Annie and Hannah are fighting
    9·2 answers
  • Please help with this assignment paper in science.
    14·1 answer
  • A Level is set up midway between two wood hubs that are about 300 ft. apart. The rod reading on hub A is 9.09 ft. and the readin
    12·1 answer
  • A hiker, caught in a rainstorm might absorb 1 liter of water in her clothing. if it is windy so that this amount of water is eva
    9·1 answer
  • A 1,500-kg car accelerates along a flat track to a speed of 20 m/s. how much does it's gravitational potential energy increases
    11·1 answer
  • Calculate the angular velocity of the earth in its orbit around the sun and about its axis.
    9·1 answer
  • A dancer starts 3 meters from the curtain then moves 8 meters from the curtain in 15 seconds. What was his velocity?
    5·1 answer
  • A ladder is leaning against a vertical wall, and both ends of the ladder are at the point of slipping. The coefficient of fricti
    10·1 answer
  • Which statement about metals is true?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!