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
Gekata [30.6K]
3 years ago
7

David runs 100 m in a time of 9.80 s. Calculate his average speed. State the unit.

Physics
1 answer:
fiasKO [112]3 years ago
3 0

Answer:

His average speed is 980 units

You might be interested in
What type of wave has more energy, an ultraviolet wave or an x-ray?
muminat
As the wave length increases the energy of the wave decreases as the equation that relates the c=λυ λ is the wave length and υ is the frequency (which is directly proportional to the energy).
In the wave length spectrum, x-ray has a shorter wave length, meaning that x-ray has a higher energy than ultraviolet waves.

Hope this helps.

3 0
3 years ago
What happen when a star dies?
Vera_Pavlovna [14]
It depends on the size of the star. If it's size was normal then it cools down into White dwarf, then a black dwarf. If a really huge star dies, then we can see a "Supernova" from that.

Hope this helps!!
7 0
3 years ago
Several large firecrackers are inserted into the holes of a bowling ball, and the 6.3 kg ball is then launched into the air with
Anni [7]

Answer

given,

mass of the ball = 6.3 kg

speed of the ball = 10.4 m/s

angle made with horizontal = 43°

m_a = 1.8 kg               v_a = 2.2 m/s

m_b = 1.6 kg               v_b = 1.8 m/s

mass of third particle = 6.3 - 1.8 - 1.6

                                   = 2.9 kg

u cos θ = 10.4 x cos 43° = 7.61 m/s

by using conservation momentum along x-axis

6.3 x 7.61 = 1.8 × (-2.2) + 0 + 1.6 × V₃ₓ

V₃ₓ = 32.44 m/s (toward right)

by using conservation momentum along y-axis

0 = 0 + 1.6 x 1.8 + 1.6 × V₃y

V₃y = -1.8 m/s (indicate downward)

velocity of the third particle

v = \sqrt{32.44^2 + (-1.8)^2}

v = 32.49 m/s

tan \theta = \dfrac{-1.8}{32.44}

\theta = tan^{-1}(\dfrac{-1.8}{32.44})

θ = 3.176° (downward with horizontal)

4 0
3 years ago
Help yet again :) A hockey player is skating on the ice at 15km/h. He shoots the puck at 138 km/h according to a radar gun on th
IceJOKER [234]

Answer:

speed of puck acc. to the radar gun = 138 km/h

speed of player = 15 km/h

since the player is in motion when he shoots, the speed of the puck will be the sum of the speed of the player and the speed at which he shot. so,

speed of puck = speed of player + speed of puck acc. to player

138 = 15 + speed of puck acc. to player

speed of puck acc. to player = 138 -15

speed of puck acc. to player = 123 km/h

Brainly this answer if you think it deserves it

7 0
3 years ago
Alright eksqijakojqnlqozjzbw.wlisj
saw5 [17]

Answer:

eksqijakojqnozjzbw.wlisjaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Explanation:

6 0
2 years ago
Other questions:
  • A warm-up is the exact same thing as a flexibility workout<br><br> True<br> False
    9·1 answer
  • .... Answer this... ​
    15·1 answer
  • Elle is playing with a ball in a bus that moves in a straight line with constant velocity. What can you say about the motion of
    7·1 answer
  • When I move a conductor through a magnetic field, the change in magnetic field creates a net change in magnetic flux. The EMF th
    8·1 answer
  • Can you correctly identify facts about these two historical models of the solar system?
    9·1 answer
  • A 2.00 kg, frictionless block s attached to an ideal spring with force constant 550 N/m. At t = 0 the spring is neither stretche
    11·1 answer
  • How to correct dimensions of <br><br>capillary rise of liquid in a tube​
    15·1 answer
  • During Photosynthesis, solar energy is absorbed. What kind of reaction is<br> taking place?
    6·2 answers
  • Check out this app! It's millions of students helping each other get through their schoolwork. https://brainly.app.link/qpzV02Ma
    5·2 answers
  • 1) How much work is done when a force of 50N<br> pulls a wagon 20 meters?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!