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
Furkat [3]
2 years ago
7

Hannah walks 0.30 km to class in 5.0 min. what is her average speed in m/s?

Physics
1 answer:
OverLord2011 [107]2 years ago
3 0

Answer:

1.0 m/s

Explanation:

First, convert to SI units.

0.30 km × (1000 m / km) = 300 m

5.0 min × (60 s / min) = 300 s

Speed is distance divided by time:

300 m / 300 s = 1.0 m/s

You might be interested in
What is the restoring force of a spring with a spring constant of 4a and a stretched displacement of 3b? A. –7 ab B. `-7 a/b ` C
algol13

Answer:

C. -12 ab

Explanation:

The restoring force on a spring is given by Hooke's law:

F=-kx

where

k is the spring constant

x is the stretched (or compressed) displacement of the spring

In this problem we have:

k = 4a

x = 3b

Substituting into the equation, we find:

F=-(4a)(3b) = -12 ab

And the negative sign means that the direction of the force (negative) is opposite to the direction of the displacement (positive).

3 0
3 years ago
Which disadvantage of nuclear power use poses the greatest threat to the environment?
Mekhanik [1.2K]

The correct answer is The storage and management of radioactive wastes

Explanation:

In general, nuclear reactions (changes in the nucleus of an atom such as fission) release a lot of energy including a lot of heat. Moreover, this heat is used by humans to obtain electricity and other types of energy, which is known as a nuclear power. This type of power is considered positive because it does not emit carbon and it is quite efficient.

However, in most cases, it is a threat to the environment and living beings because storing and managing the wastes of this type of power is difficult and expensive. Indeed, dealing with the wastes of nuclear power requires complex infrastructure, and any accident or leaking leads to serious consequences from the death of those exposed to the wastes to permanent loss of diversity or changes in nearby areas.

6 0
3 years ago
Read 2 more answers
2. How much do you think the force of friction must be? Why?
Tamiku [17]

Answer:

It must be high do to the gravity

Explanation:

4 0
2 years ago
What is true about the relationship between the kinetic energy of molecules in an object and the objects temperature?
vekshin1

As the temperature increases the kinetic energy of the molecules increases, if u add more heat you get more kinetic energy.

6 0
3 years ago
Explain why it takes more energy to remove the second electron from a lithium atom than it does to remove the fourth electron fr
slava [35]
It takes more energy to remove the second electron from a lithium atom than it does to remove the fourth electron from a carbon atom because its inner core e, not valence e. C's 4th removed e is still a valence e. And also <span>because more nuclear charge acting on the second electron, it is more close to the nucleus, thus the the protons attract it more than the 4th electron.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • A 675-pound trailer is sitting on an exit ramp inclined at 40o on Highway 35. How much vertical force is required to keep the tr
    10·1 answer
  • If the brakes are applied and the speed of the car is reduced to 13 m/s in 17 s , determine the constant deceleration of the car
    9·1 answer
  • How do astronomers use rocks from the moon to estimate the age of the solar system?
    6·1 answer
  • Help please 80pnts and brainliest guaranteed
    7·1 answer
  • Sometimes it is very hard to hear in a gymnasium because of echoes . How can you changed it
    10·1 answer
  • (a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the
    10·1 answer
  • Electromagnets can be used to lock doors. How could an engineer increase the strength of an electromagnetic lock? Check all that
    6·1 answer
  • Two condition required for work done​
    14·1 answer
  • A particular laser developed in 1995 at the University of Rochester, in New York, produced a beam of light that lasted for about
    11·1 answer
  • Write a beta decay equation for the
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!