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
Novosadov [1.4K]
3 years ago
10

Amy is standing still on the ground; Bill is riding his bicycle at 5 m/s eastward; and Carlos is driving his car at 15 m/s westw

ard. How fast does Bill see Carlos moving and in what direction?
Physics
1 answer:
Solnce55 [7]3 years ago
3 0

Answer:

20 m/s westward

Explanation:

Taking eastward as positive direction, we have:

v_B = +5 m/s is the velocity of Bill with respect to Amy (which is stationary)

v_C = -15 m/s is the velocity of Carlos with respect to Amy

Bill is moving 5 m/s eastward compared to Amy at rest, so the velocity of Bill's reference frame is

v_B = +5 m/s

Therefore, Carlos velocity in Bill's reference frame will be

v_C' = v_C - v_B = -15 m/s - (+5 m/s) = -20 m/s

and the direction will be westward (negative sign).

You might be interested in
A 10-gram aluminum cube absorbs 677 joules when its temperature is increased from 50°c to 125°
kotegsom [21]

Answer : The specific heat of aluminum is, 0.90J/g^oC

Solution : Given,

Heat absorbs  = 677 J

Mass of the substance = 10 g

Final temperature = 125^oC

Initial temperature = 50^oC

Formula used :

Q= m\times c\times \Delta T

or,

Q= m\times c\times (T_{final}-T_{initial})

Q = heat absorbs

m = mass of the substance

c = heat capacity of aluminium

T_{final} = final temperature

 T_{initial} = initial temperature

Now put all the given values in the above formula, we get the specific heat of aluminium.

677g= (10g)\times c\times (125-50)^oC

c=0.9026J/g^oC=0.90J/g^oC

Therefore, the specific heat of aluminum is, 0.90J/g^oC

7 0
3 years ago
Read 2 more answers
If a net force of 800n is acting on an object with a mass of 60kg. What would be the objects accelerations
aivan3 [116]

Answer: 13.33 m/s^2

Explanation:

Force is the product of mass of an object and its acceleration.

i.e Force = Mass x Acceleration

Since Force on object = 800N

Mass of object = 6Kg

Acceleration = ?

Then, Force = Mass x Acceleration

800N = 60Kg x Acceleration

Acceleration = (800N/60kg)

Acceleration = 13.33 m/s^2 (The unit of acceleration is metre per second square)

Thus, the objects accelerations is 13.33 m/s^2

5 0
4 years ago
In the video, you saw NASA launch a rocket carrying a rover to Mars. What is the mission of the Mars land rover, and why is it i
Darya [45]
The Curiosity rover launched<span> on a two-stage Atlas V-541 </span>launch<span> vehicle, provided by United </span>Launch<span>Alliance, a joint venture of Boeing Co. and Lockheed Martin Corp.</span>
3 0
3 years ago
Read 2 more answers
An element from group 2 on the periodic table will bond lonically with elements from group 17(7A)
Natalija [7]

Answer:

Elements in group IIA have 2 electrons in their outermost shell so they can donate these electrons of group VII A which have seven electrons in their outermost shell. So it is necessary 2 elements of group VII A, each atoms accepts one electron.

Explanation:

8 0
3 years ago
2. The weights of four objects with different masses have been calculated to show how much each object would weigh on four diffe
meriva

Answer:

d

Explanation:

8 0
3 years ago
Other questions:
  • Much of the general structure and physical properties of the interior of the earth are inferred from:
    13·2 answers
  • What do all group 2 elements have in common? They all gain two electrons to form a stable outer energy level. They form covalent
    8·2 answers
  • 24 g of water is heated from 25 c to 35<br> c. how much heat energy was required
    11·1 answer
  • A resistor is made out of a long wire having a length LLL. Each end of the wire is attached to a terminal of a battery providing
    13·1 answer
  • What amount of heat is removed to lower the temperature of 80 grams of water from 75ºC to 45ºC? The specific heat of liquid wate
    12·2 answers
  • What is the basic difference between ultraviolet, visible, and infrared radiation?
    5·1 answer
  • How do you balance this equation Mg+ O2= MgO
    12·1 answer
  • Julie, a physics major, has difficulty believing that psychology is a science, because people cannot observe other people's thou
    5·1 answer
  • What is the velocity of position A and B?<br>answer please ​
    8·1 answer
  • The motion of a car is represented as shown. The average
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!