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
ki77a [65]
3 years ago
7

Kenna has a mass of 30 kilograms. What's her weight in newtons? Assume that acceleration due to gravity is 9.8 N/kg.

Physics
1 answer:
astra-53 [7]3 years ago
5 0

Answer:

294 N

Explanation:

The weight of an object is the gravitational force exerted by the Earth on the object.

The direction of this force is always towards the Earth's centre, while the magnitude is given by:

W=mg

where

W is the weight

m is the mass of the object

g is the acceleration due to gravity

Here we have:

m = 30 kg is the mass of the object

g = 9.8 N/kg is the acceleration due to gravity

So, the weight of the object is

W=(30)(9.8)=294 N

You might be interested in
A greyhound's velocity changes from 10 meters per second to 15 meters per second in 0.5 second. What is the greyhound's average
alexgriva [62]
I think it is 5 m/s  
4 0
3 years ago
Read 2 more answers
By using fossils and matching layers rock layers can be correlated to eachother.
bija089 [108]
I think that the answer to that is true hope that helps
4 0
3 years ago
Read 2 more answers
The unit of energy is a derived unit why​
olga2289 [7]

Answer:

The unit of energy is joule which depends upon the fundamental unit kg, m and sec. So, the unit of energy is a derived unit.

Explanation:

7 0
2 years ago
Read 2 more answers
according to the theory developed by Charles darwin what process causes organisms to develop traita that help them adapt to chan
Anettt [7]

the answer is natural selection

8 0
2 years ago
Read 2 more answers
If the Earth and distant stars were stationary (motionless) in space, what would we observe about the wavelength from these star
dangina [55]
1) In the first case, the correct answer is
<span>A.Wavelengths measured would match the actual wavelengths emitted.
In fact, the stars are not moving relative to Earth, so there is no shift in the measured wavelength.

2) In this second case, the correct answer is
</span><span>A.Wavelengths measured would be shorter than the actual wavelengths emitted.
</span>in fact, since the stars in this case are moving towards the Earth, then apparent frequency of their emitted light will be larger than the actual frequency, because of the Doppler effect, according to the formula:
f'= \frac{c}{c+v_s} f_0
where f0 is the actual frequency, f' the apparent frequency, c the speed of light and vs the velocity of the source (the stars) relative to the obsever (Earth). Vs is negative when the source is moving towards the observer, so the apparent frequency f' is larger than the actual frequency f0. But the wavelength is inversely proportional to the frequency, so the apparent wavelength will be shorter than the actual wavelength.
6 0
3 years ago
Other questions:
  • How long is a football field?
    14·2 answers
  • What are three common forms of work in science
    6·2 answers
  • A thin, uniform rod is hinged at its midpoint. to begin with, one-half of the rod is bent upward and is perpendicular to the oth
    14·2 answers
  • If a car changes its velocity from 32 km/hr to 54 km/hr in 8.0 seconds, what is its acceleration?
    13·2 answers
  • A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH. The total momentum of th
    8·1 answer
  • Suggest a form of renewable energy that could be used to power an electric ticket machine that only needs to work during dayligh
    11·1 answer
  • How many newtons of force are required to move a 54.87 kg object with an acceleration of 9.8 m/s/s?
    9·1 answer
  • How are cheek and skin cells different?
    7·1 answer
  • How much energy is required to change a 44 g
    8·1 answer
  • Object 1 has a mass of 7.0kg and a initial velocity of 17.0 m/s. Object 2 has a mass of 8.0kg and a initial velocity of -14.0 m/
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!