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
RSB [31]
3 years ago
9

Give reasons.

Physics
1 answer:
Yanka [14]3 years ago
4 0
A. A stretched catapult can do work when released so it must have potential energy.

b. A stone on the ground will not move on its own ever again so it has zero energy.

c. In order to roll an object there must be a friction force between the object and the ground (otherwise it will slide)

d. To lift a stone you must overcome the weight which is the force due to gravity.

e. Work and energy are both measured in Joules.
You might be interested in
A biologist formulates a hypothesis, performs experiments to test his hypothesis, makes careful observations, and keeps accurate
SVEN [57.7K]
<span>The next step of the scientific method is to analyze the results and draw conclusions. After that step, if the results agree with the hypothesis, then the results should be communicated. If the results do not support the original hypothesis, then the biologist must go back to the beginning and reformulate their hypothesis based on the results of the experiment.</span>
4 0
3 years ago
A transmission diffraction grating with 420 lines/mm is used to study the light intensity of di event orders (n). A screen is lo
Goshia [24]

Answer:

Explanation:

Diffraction grating is used to form interference pattern of dark and bright band.

Distance between adjacent slits (a ) = 1 / 420 mm

= 2.38 x 10⁻³ mm

2.38 x 10⁻⁶ m

wave length of red light

= 680 x 10⁻⁹ m

For bright red band

position x on the screen

= n λD / a ,         n = 0,1,2,3 etc

D = distance of screen

putting n = 1 , 2 and 3 , we can get three locations of bright red band.

x₁ = λD / a

=  680 x 10⁻⁹ x 2.8 / 2.38 x 10⁻⁶

= .8 m

= 80 cm

Position of second bright band

= 2 λD / a

= 2 x 80

= 160 cm

Position of third bright band

= 3 λD / a

= 3 x 80

= 240 cm

5 0
3 years ago
What would happen to the function or purpose of flower if the stigma wasn't sticky?
sashaice [31]

Answer:

The plant would not reproduce because the flower uses the stigma to catch the pollen

8 0
3 years ago
Read 2 more answers
RP COME AND GET IT!!!!!!!!
Ahat [919]
I need someone to help me with my finals!!!!
6 0
3 years ago
Read 2 more answers
An object is placed to the left of a convex mirror, such that the object-to-image distance is 140 cm.
labwork [276]

Answer:

The focal length of the mirror is 52.5 cm.

Explanation:

Given that,

Object to Image distance d = 140 cm

Image distance v= 35 cm

We need to calculate the object distance

u = d-v

u = 140-35=105\ cm

We need to calculate the focal length

Using formula of mirror

\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}

Put the value into the formula

\dfrac{1}{f}=\dfrac{1}{-105}+\dfrac{1}{35}

\dfrac{1}{f}=\dfrac{2}{105}

f=52.5\ cm

Hence, The focal length of the mirror is 52.5 cm.

6 0
3 years ago
Other questions:
  • What properties of titanium make it attractive for use in race-car and jet-engine components?
    5·1 answer
  • A uniform crate with a mass of 22 kg must be moved up along the 15° incline without tipping. The force P is horizontal. Determin
    8·1 answer
  • As a storm front moves in you notice that the column of mercury in a barometer rises to only mm. (a) what is the air pressure? k
    8·1 answer
  • Which federal agency protects ecosystems and supervisors public access the forests
    7·2 answers
  • According to Boyle’s law, PV= K, what was the volume at the time of the first measurement given the following information? Round
    15·1 answer
  • How do you calculate acceleration?
    14·2 answers
  • Which options lists a form of kinetic energy followed by a form of potential
    14·1 answer
  • Which is a characteristic of the part of the atom marked "A"?Which is a characteristic of the part of the atom marked "A"?Which
    13·2 answers
  • The process of blood cell formation is called
    7·1 answer
  • Ysical Science A
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!