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
MAVERICK [17]
3 years ago
8

In the 2008 Olympics, Jamaican sprinter usain's bolt average shocked the world as he ran the 100- meter dash in 9.69 seconds. De

termine usain's average speed for the race.
Physics
1 answer:
torisob [31]3 years ago
6 0
<span>Avg Speed = Total Distance/Total time taken avg speed= 100 m / 9.69sec = 10.3 m/sec.</span>
You might be interested in
What two quantities do you have to know to calculate the density of and object?
charle [14.2K]
'Density' is defined as (mass) / (volume). You need enough information to be able to measure or calculate the mass and the volume of the object.
3 0
3 years ago
The human circulation system has approximately 1×109 capillary vessels. Each vessel has a diameter of about 8 µm. Assuming cardi
RUDIKE [14]

Answer:

I don't know what you are asking

5 0
4 years ago
the net external force on the 24-kg mower is stated to be 51 N. If the force of friction opposing the motion is 24 N, what force
-Dominant- [34]

Answer:

PART A)

External force will be 75 N

PART B)

distance moved will be 1.125 m

Explanation:

PART A)

Given that net force on the mower is

F_{net} = 51 N

now we also know that friction force due to ground is given as

F_f = 24 N

now we have

F_{net} = F_{ext} - F_f

51 = F_{ext} - 24

F_{ext} = 75 N

so external force will be 75 N

PART B)

deceleration due to friction when external force is removed from it

a = \frac{F_f}{m}

a = \frac{24}{24} = 1 m/s^2

now we can find the distance by kinematics

v_f^2 - v_i^2 = 2 a d

0 - 1.5^2 = 2(-1)d

d = 1.125 m

so the distance moved will be 1.125 m

6 0
3 years ago
A 30kg mass is brought from the earth to the moon what is the weight on the earth
ozzi

Answer:

Solution

verified

Verified by Toppr

Given:

Mass of body = 30 kg

gravitational acceleration on the moon = 1.62 m/s

2

Weight of the body on the moon = Mass of the body×gravitational acceleration on the moon=30×1.62=48 N

8 0
2 years ago
(II) You buy a 75-W lightbulb in Europe, where electricity is delivered at 240 V. If you use the bulb in the United States at 12
Elodia [21]

Answer:

Explanation:

You are looking for the resistance to start with

W = E * E/R

75 = 240 * 240 / R

75 * R = 240 * 240

R = 240 * 240 / 75

R = 57600 / 75

R = 768

Now let's see what happens when you try putting this into 110

W = E^2 / R

W = 120^2 / 768

W = 18.75

So the wattage is rated at 75. 18.75 is a far cry from that. I think they intend you to set up a ratio of

18.75 / 75 = 0.25

This is the long sure way of solving it. The quick way is to realize that the voltage is the only thing that is going to change. 120 * 120 / (240 * 240) = 1/2*1/2 = 1/4 = 0.25

4 0
3 years ago
Other questions:
  • A gamma ray and a microwave traveling in a vacuum have the same?
    7·2 answers
  • Which of the following is an example of a rotating body?
    15·2 answers
  • Imagine you are holding a small ball below you so that you look down on its "north pole." turn the ball in a counterclockwise di
    15·1 answer
  • What is precision in physics​
    14·1 answer
  • What evidence supports the fact that this image is of a trial? Check all of the boxes that apply. The women are pointing. The wo
    8·2 answers
  • What is kinetic energy of a 7.26kg bowling ball that is rolling at a speed of 2m/s?
    5·1 answer
  • A 4kg object is moving at a speed of 5 m/sec.how much kinetic energy does the objects have
    5·1 answer
  • 1.- Que distancia recorrió una carga de 2,5x10-6 coul, generando así un campo eléctrico de 55new/coul.​
    5·1 answer
  • Your pulse is caused by pressure of the blood on the artery wall, and it corresponds to your heart beat.
    6·2 answers
  • A plane is traveling at 80 m/s. To prepare for landing, itslows down at a rate of 0.25 ms squared for 120 seconds. Calculate the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!