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
lys-0071 [83]
3 years ago
15

Can someone help with these questions?

Physics
1 answer:
yanalaym [24]3 years ago
6 0

One

Givens

  • v = 8.5 km/s = 8500 m/s
  • R = 25 cm = 0.25 m
  • B = 5.29 * 10^-3
  • q = 1.6*10^-19
  • m = ??

Formula

m*v^2/ R = qvB    Cancel 1 v on each side.

m*v / R = q*B

which for m when transposed is

m = q*B*R/v

m = 1.6*10^-19 * 5.29*10^-3 * 0.25 / 8500

m = 2.49 * 10^-26

Answer: A

Two

Givens

  • B = 0.5 T
  • q = 1.6 * 10^ -19
  • v = ??
  • m = 3.34 * 10^-27
  • R = 55.6 cm = 0.556 m

Formula

qvB = mv^2/R    Cancel one of the "v"s

qB = mv/R

qBR / m = v

Solution

1.6*10^-19 * 0.5 T * 0.556 m / 3.34 * 10^-27

13317365 = v

1.33 * 10^7 = v

You might be interested in
Puck B has twice the mass of puck A. Starting from rest, both pucks are pulled the same distance across frictionless ice by stri
gogolik [260]

Answer:

(a) 1 : 2

(b) same

Explanation:

Let the mass of puck A is m and the mass of puck B is 2 m.

initial speed for both the pucks is same as u and the distance is same for both is s.

let the tension is T for same.

The kinetic energy is given by

K = 0.5 mv^2

(a) As the speed is same, so the kinetic energy depends on the mass.

So, kinetic energy of A : Kinetic energy of B = m : 2m  = 1 : 2

(b) A the distance s same so the final velocities are also same.

8 0
2 years ago
Which of the following objects has the greatest density
maks197457 [2]
The density is determined on the steepness of the slope. The greater the density is bases upon the steepest slope. To conclude, I'd say Line A has the steepest slope therefore has the greatest density.
6 0
3 years ago
Read 2 more answers
The current theory of the structure of the
IRISSAK [1]

1) The mass of the continent is 3.3\cdot 10^{21} kg

2) The kinetic energy of the continent is 624 J

3) The speed of the jogger must be 4 m/s

Explanation:

1)

We start by finding the volume of the continent. We have:

L = 5850 km = 5.85\cdot 10^6 m is the side

t = 35 km = 3.5\cdot 10^4 m is the depth

So the volume is

V=L^2 t = (5.85\cdot 10^6)^2 (3.5\cdot 10^4)=1.20\cdot 10^{18} m^3

We also know that its density is

d=2750 kg/m^3

Therefore, we can find the mass by multiplying volume by density:

m=dV=(2750)(1.20\cdot 10^{18})=3.3\cdot 10^{21} kg

2)

The kinetic energy of the continent is given by:

K=\frac{1}{2}mv^2

where

m=3.3\cdot 10^{21} kg is its mass

v = 3.2 cm/year is the speed

We have to convert the speed into m/s. We have:

3.2 cm = 0.032 m

1 year = 1(365)(24)(60)(60)=3.15\cdot 10^7 s

So, the speed is:

v=\frac{0.032 m}{3.15 \cdot 10^7 s}=1.02\cdot 10^{-9} m/s

So, we can now find the kinetic energy:

K=\frac{1}{2}(1.20\cdot 10^{21})(1.02\cdot 10^{-9})^2=624 J

3)

Here we have a jogger of mass

m = 78 kg

And the jogger has the same kinetic energy of the continent, so

K = 624 J

The kinetic energy of the jogger is given by

K=\frac{1}{2}mv^2

where v is the speed of the jogger.

Solving for v, we find the speed that the jogger must have:

v=\sqrt{\frac{2K}{m}}=\sqrt{\frac{2(624)}{78}}=4 m/s

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

3 0
3 years ago
A substance that contains only one kind of matter is known as a(n)
Anna35 [415]
An element would be the type of substance that only contains one kind of matter.
3 0
3 years ago
What does malleablity means
daser333 [38]

Able to be hammered or pressed permanently out of shape without breaking or cracking.

3 0
3 years ago
Other questions:
  • On both the spring and fall equinoxes, the sun's rays are vertically overhead at the _______
    12·1 answer
  • Which of the following is not a reason fluorescent lamps are advantages over incandescent lamps?
    11·1 answer
  • If a velocity is positive which would most likely yield a negative acceleration
    5·1 answer
  • Which surface has the most friction? a An ice rink b A grassy field c A paved road
    15·2 answers
  • A compound that releases hydrogen ions in solution would most likely have which chemical property?
    13·2 answers
  • Is the matching correct?
    13·1 answer
  • . A stationary mass explodes into two parts of mass 4 kg and 40 kg . If the K.E of larger mass is 100 J . The K.E of small mass
    5·1 answer
  • A 3.47-m rope is pulled tight with a tension of 106 N. A wave crest generated at one end of the rope takes 0.472 s to propagate
    5·1 answer
  • 19. a) Name the type of Joint present in i) Neck ii) Shoulder b) Which of the skull bones are movable ?​
    14·1 answer
  • A seagull flies at a velocity of 9.00 m/s straight into the wind.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!