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
sweet-ann [11.9K]
3 years ago
13

A person is standing on a completely frictionless surface. Can they walk on this surface? Explain! What could they do to move ac

ross the surface? Explain!
Physics
1 answer:
Digiron [165]3 years ago
4 0

Answer:

Explanation:

We cannot walk on a surface which has no friction.

To move across the surface, take a stone and throw it in the opposite direction of motion so that you get a reaction in the direction of motion and then you move across the surface.

You might be interested in
Installed on your roof is a solar panel that has a surface area of 1.00 m2 . How many photons from the Sun reach the panel? Assu
kirill115 [55]

Answer:

3.95241\times 10^{21}\ Photons/second

Explanation:

h = Planck's Constant = 6.626\times 10^{-34}\ m^2\kgs

A = Area = 1 m²

Distance between Earth and Sun = 1.5\times 10^{11}\ m

\lambda = Wavelength = 580 nm

c = Speed of light = 3\times 10^8\ m/s

Power output of Sun

P=3.83\times 10^{26}\ W

Intensity

I=\frac{P}{4\pi d^2}\times A\\\Rightarrow I=\frac{3.83\times 10^{26}}{4\pi (1.5\times 10^{11})^2}\times 1\\\Rightarrow I=1354.5854\ W

Energy of photons

E=\frac{hc}{\lambda}\\\Rightarrow E=\frac{6.626\times 10^{-34}\times 3\times 10^8}{580\times 10^{-9}}\\\Rightarrow E=3.42724\times 10^{-19}\ J

Number of photons

N=\frac{I}{E}\\\Rightarrow N=\frac{1354.5854}{3.42724\times 10^{-19}}\\\Rightarrow N=3.95241\times 10^{21}\ Photons/second

The number of photons are 3.95241\times 10^{21}\ Photons/second

8 0
3 years ago
Which describes an image that a concave mirror can make?
Zigmanuir [339]
An image that a concave mirror can make is that it <span>can form a real image that is projected out in front of the mirror. </span>A concave mirror<span> is a mirror that is curved inward in the middle. Using the mirror equation, you can deal with concave mirrors. It's like you're looking into a cave when try to look in a concave mirror.</span>
6 0
3 years ago
If a photon of Light leaves the sun than reachers the earth 494 second later. What is the distance from the earth to sun
denis-greek [22]

The distance from the Earth to the Sun is 92.96 million mi.

4 0
4 years ago
Read 2 more answers
g A box having mass 0,5kg is placed in front of a 20 cm compressed spring. When the spring released, box having mass m1, collide
vagabundo [1.1K]

Answer:Expression given below

Explanation:

Given mass of spring\left ( m_1\right )=0.5 kg

Compression in the spring\left ( x\right )=20 cm

Let the spring constant be K

Using Energy conservation

potential energy stored in spring =Kinetic energy of Block\left ( m_1\right )

\frac{1}{2}Kx^2=\frac{1}{2}m_1v^2

v=x\sqrt{\frac{k}{m_1}}

now conserving momentum

m_1v=\left ( m_1+m_2\right )v_0

v_0=\frac{m_1}{m_1+m_2}v

where v_0 is the final velocity

3 0
4 years ago
Barnard's star is a near neighbor of the Sun whose properties we know quite well. It is a type M4V with absolute magnitude 13.22
vitfil [10]

Answer:

The star is at a distance of 100 parsecs.

Explanation:

The distance can be determined by means of the distance modulus:

M - m = 5log(d) - 5  (1)

Where M is the absolute magnitude, m is the apparent magnitude and d is the distance in units of parsec.

Therefore, d can be isolated from equation 1

log(d) = (M - m + 5)/5

Then, Applying logarithmic properties it is gotten:

d = 10^{(M - m + 5)/5}  (2)

The absolute magnitude is the intrinsic brightness of a star, while the apparent magnitude is the apparent brightness that a star will appear to have as is seen from the Earth.

Since both have the same spectral type is absolute magnitude will be the same.

Finally, equation 2 can be used:

d = 10^{(13.22 - 8.22+ 5)/5}  

d = 100 pc    

Hence, the star is at a distance of 100 parsecs.

Key term:

Parsec: Parallax of arc seconds

8 0
3 years ago
Other questions:
  • Which of the following is Not true about the noble gases
    9·1 answer
  • ANSWER QUICKLY!!!!!
    7·2 answers
  • g Two boxes with a mass of 34 kg each are resting on a surface where the coefficient of static friction is LaTeX: \mu_sμ s = 0.4
    14·1 answer
  • A solar charging system produces 14.5 volts on a sunny day the currents flows through the circuit at 43.5 ramps what is the resi
    7·1 answer
  • Which of the following is not an experimental science
    15·1 answer
  • Do electric field lines actually exist?​
    7·1 answer
  • FROM THE _____ WHOLE WATER CYCLE STARTS ALL OVER AGAIN
    5·2 answers
  • What is tangential velocity
    12·2 answers
  • Find the acceleration produced by a force of 165 N on a mass of 4.50 kg.
    13·1 answer
  • (a ) A 14 turns circular coil is placed on a paper which lies in 1.2 T magnetic field pointing inwards to the paper. The coil's
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!