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
15

As you move further from a light source, the photons of light spread out over a larger distance. In other words, the light _____

________ decreased. *
A. intensity
B. wavelength

The force of gravity that the sun exerts on a planet is always in what direction?

A. toward the sun
B. toward the planet
C. away from the sun

How much work is done when 15 Newtons are applied to move an object 3 m?

A. 5 J
B. 45 J
C. 12 J
Physics
1 answer:
frutty [35]3 years ago
8 0

Answer:

INTENSITY,  TOWARD THE SUN, 45 J

Explanation:

You might be interested in
If the coefficient of friction between block and surface is 0.251 , what was the speed of the bullet immediately before impact?
lubasha [3.4K]

Explanation:

Below is an attachment containing the solution.

4 0
3 years ago
Please can someone solve this physics question with a good explenation.
zimovet [89]

Answer:

The coefficient of dynamic friction is 0.025.

Explanation:

Given:

Initial speed after the push is 'v' as seen in the graph.

Final speed of the stone is 0 m/s as it comes to rest.

Total distance traveled is, D=29.8\ m

Total time taken is, t_{total}=17.5\ s

Time interval for deceleration is 3.5 to 17.5 s which is for 14 s.

Now, average speed of the stone is given as:

v_{avg}=\frac{D}{t_{total}}=\frac{29.8}{17.5}=1.703\ m/s

Now, we know that, average speed can also be expressed as:

v_{avg}=\frac{v_i+v_f}{2}\\1.703=\frac{v+0}{2}\\v=2\times 1.703=3.41\ m/s

Now, from the graph, the vertical height of the triangles is, v=3.41\ m/s

The deceleration is given as the slope of the line from time 3.5 s to 17.5 s.

Therefore, deceleration is:

a=\frac{\textrm{Vertical height}}{\textrm{Time interval}}\\a=\frac{v-0}{17.5-3.5}\\a=\frac{3.41}{14}=0.244\ m/s^2

Frictional force is the net force acting on the stone. Frictional force is given as:

f=\mu_dN\\Where, \mu_d\rightarrow \textrm{coefficient of dynamic friction}\\N\rightarrow \textrm{Normal force}\\N=mg\\\therefore f=\mu_dmg

Now, from Newton's second law, net force is equal to the product of mass and acceleration.

Therefore,

\mu_dmg=ma\\\mu_d=\frac{a}{g}

Plug in 0.244 for 'a' and 9.8 for 'g'. This gives,

\mu_d=\frac{a}{g}=\frac{0.244}{9.8}=0.025

Therefore, the coefficient of dynamic friction is 0.025.

3 0
3 years ago
Compare and contrast camera obscura with what you know about modern digital photography, including cell phones.
Sonja [21]

Answer:

It captures images but does not preserve them.

5 0
2 years ago
Read 2 more answers
When two or more forces act together on an object what do they combine to form
Daniel [21]
Without knowing anything about their magnitudes or directions, the only thing you can always say about thier combination is that it's the "net force" on the object.
7 0
3 years ago
A rocket carrying a satellite is accelerating straight up from the earth’s surface. At 1.15 s after liftoff, the rocket clears t
yarga [219]

Answer:

197.263157895 m/s

169.491525424 m/s

Explanation:

x Denotes position

t Denotes time

Average velocity is given by

v_a=\dfrac{x_2-x_1}{t_2}\\\Rightarrow v_a=\dfrac{1000-63}{4.75}\\\Rightarrow v_a=197.263157895\ m/s

The average velocity is 197.263157895 m/s

v_a=\dfrac{x_2-x_1}{t_2}\\\Rightarrow v_a=\dfrac{1000-0}{5.9}\\\Rightarrow v_a=169.491525424\ m/s

The average velocity is 169.491525424 m/s

8 0
3 years ago
Other questions:
  • Which has a higher acceleration: a 10 kg object acted upon with a net force of 20 N or an 18 kg object acted on by a net force o
    6·1 answer
  • 4.Explain what must be true of component waves for reinforcement or interference to occur.
    9·1 answer
  • Four breakers of four different sizes are filled with water to the same depth. The temperature of the water is the same in all f
    8·1 answer
  • The force of repulsion between two like-charged particles will increase if
    11·2 answers
  • what are some challenges of scuba diving and how do pressure variations in depth affect our ability to explore the ocean?
    9·1 answer
  • The planet earth orbits around the sun and also spins around its own axis. True or False
    7·1 answer
  • 2.A 5 Ohm resistor is connected to a 9 Volt battery. How many Joules of thermal energy are produced in 7 minutes?
    10·1 answer
  • What use do we have for motion diagrams?
    6·1 answer
  • A baseball is thrown horizontally at 55m/s. The ball slows down at a rate of -10 m/s2. How long is the ball in the air before co
    11·1 answer
  • A baseball pitcher throws a fastball with a 100 ns impulse. if he applied the force in 0. 15 seconds, what force did he apply?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!