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
Brrunno [24]
3 years ago
12

You are driving at 40 miles per hour and you speed up to 60 miles per hour over the course of 20 miles. How long were

Physics
1 answer:
notka56 [123]3 years ago
4 0

Answer:

120 hours

Explanation:

You might be interested in
What is the relationship between the frequency and the wavelength of a wave?
Marina CMI [18]

Answer: The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

Explanation:

7 0
2 years ago
A probe orbiting Venus exerts a gravitational force of 2.58 × 10^3 N on Venus. Venus has a mass of 4.87 × 10^24 kg. The mass of
Crazy boy [7]
So this is the info that's given to us:
m1 = 4.87 x 10^24 kg
m2 = 4.87 x 10^24kg
F = 2.58 x 10^3 N

Now we can use this equation to solve: f_g= \frac{Gm_1m_2}{r^2}

You may be asking what g is. Well, it is equal to 6.67x10^-11 m3 /kg s2. G is gravitational constant. So :

2.58 x 10^3 = \frac{6.67x10^{-11} * 4.87 x 10^{24} * 655}{r^{2}} 

As you can see we only have one variable, so we solve for r! 

r = 9.08 x 10^6 km

I hope this helps you out. I remember when I was first learning Newton's law<span> of universal </span><span>gravitation and I had some trouble. But with some practice, I got better. =) </span>

6 0
3 years ago
1. una masa oscila a la frecuencia de 3Hz y con una amplitud de 6cm. ¿cuáles serán sus posiciones en los tiempos t=0 y t= 3.22 s
alisha [4.7K]

Answer:

yes

Explanation:dccdcc

3 0
3 years ago
A ray of light is moving from a material having a high indexof refraction into a material with a lower index of refraction.
luda_lava [24]

(a) Away from the normal

We can find the direction of bending of the ray of light by using Snell's equation:

n_1 sin \theta_1 = n_2 sin \theta_2

where we have:

n1, n2: index of refraction of the first and second medium

\theta_1, \theta_2; angle that the incident and the refracted ray form with the normal to the surface

Here, the light ray moves from a material with high index of refraction to a material with lower index, so we have

n_1 > n_2

Re-arranging Snell's law we find

sin \theta_2 = \frac{n_1}{n_2} sin \theta_1

since we have

\frac{n_1}{n_2}>1

this implies

sin \theta_2 > sin \theta_1\\\theta_2 > \theta_1

so the ray of light bends away from the normal.

(b) The wavelength is greater in the second material (the one with lower index of refraction)

The wavelength of the light in a medium is given by

\lambda=\frac{\lambda_0}{n}

where

\lambda_0 is the wavelength of the light in a vacuum

n is the refractive index

The equation can be rewritten as

\lambda_0 = \lambda_1 n_1 = \lambda_2 n_2

and again it can be rewritten as

\lambda_2 = \frac{n_1}{n_2} \lambda_1

where

\lambda_1 = 600 nm\\\frac{n_1}{n_2}>1

Therefore, we have that the wavelength in the second medium (the one with lower index of refraction) is longer than the wavelength in the first medium.

(c) The frequency remains the same

Wavelength and speed of a light ray depend on the medium in which the wave is travelling through, however the frequency does not depend on that, so it remains the same in the two mediums.

8 0
3 years ago
Anne lifts a 9.0 kg barbell with an upward force of 120 N. What is the magnitude of the acceleration of the barbell while Anne i
melamori03 [73]

Answer:

<h2>13.33 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{120}{9}  \\  = 13.3333333...

We have the final answer as

<h3>13.33 m/s²</h3>

Hope this helps you

5 0
3 years ago
Other questions:
  • Please help .. there could be more than one answer to this question.
    13·1 answer
  • Which object has a constant speed? a racecar starting a race a car traveling the speed limit a bicycle coming to a stop a ball f
    10·2 answers
  • Is it true or false that Science is a rigorous process, but is not subject to intense scrutiny by others
    12·1 answer
  • Describe the relationship between a moving objects mass and its kinetic energy
    8·1 answer
  • Which of these statements best proves that electromagnetic forces are weaker than strong nuclear forces? Neutrons do not repel o
    8·1 answer
  • State one advantage and one disadvantage of using a plane mirrior as a driving mirrior​
    8·1 answer
  • Which statement correctly describes a characteristic that a scientific measuring tool should have
    10·1 answer
  • A forward horizontal force of 50 N is applied to a crate. A second horizontal force of
    15·1 answer
  • A constant force of 8.0 N is exerted for 4.0 s on a 16-kg object initially at rest. The change in speed of this object will be:
    10·1 answer
  • what kinds of investigations might have led to our current understanding of matter and energy? why is it important for scientist
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!