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Brrunno [24]
3 years ago
6

PHYSICS HELP PLEASE! will vote brainliest if valid answer! and 20pts!

Physics
2 answers:
sammy [17]3 years ago
8 0

The force that pulls the wagon is the horizontal component of the actual force, which is 290*cos(32) = 246N  


7nadin3 [17]3 years ago
4 0
The force that pulls the wagon is the horizontal component of the actual force, which is 290*cos(32) = 246N 

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Write an original definition for periodic
shepuryov [24]
I didn't want to type all of this, so instead I showed proof and gave you the answer. 

6 0
3 years ago
When you look at green dots with a red filter what color did you see?
Dimas [21]
-- Looking at the dots casually, they look green because they absorb all other
colors of light, and only green light is left to proceed to your eyes. (In order for
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Daylight and most light bulbs work fine.)

-- The filter looks red because it absorbs all other colors of light, and only
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-- When the green light from the dots hits the red filter, it's absorbed in the
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If you're looking through the filter at the dots, they look <em>black</em>.

3 0
3 years ago
A hot iron ball of mass 200 g is cooled to a temperature of 22°C. 6.9 kJ of heat is lost to the surroundings during the process.
qaws [65]
Heat lost or gained, H = mc(θ₂ - θ₁) 
Where m = mass, c = Specific heat capacity, θ₂= final temperature, θ₁ = initial temperature

m = 200g, c = 0.444 J/g°C, θ₁ = 22 °C  (Since it was cooled).

H = 6.9 kj = 6.9 *1000J = 6900 J

6900 = 200*0.444* (θ₂ - 22)

6900/(200*0.444)  =  θ₂ - 22

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So initial temperature before cooling ≈ 100°C .  Option C.


5 0
3 years ago
Read 2 more answers
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the earthbound person’s voice w
abruzzese [7]

Answer:

3.85*10^8m

Explanation:

We know that

Speed v = distance/time t

So distance = v x t

So = 3*10^8 x 2.56s

= distatance = 7.7*10^8m

However this is double the distance from the earth to the moon, so to get distance from earth to the moon we divide by 2

7.7*10^8/2= 3.85*10^8m

8 0
3 years ago
Given that the distance from the left end of the string to the first antinode is 27.5 cm , calculate the wavelength of the stand
ivolga24 [154]

Answer:

= 0.55 m

Explanation:

A standing wave is characterized by anti-nodes and nodes.

Antinodes are points on a standing wave at maximum amplitude, while nodes are points on the standing wave that are stationary and have zero amplitude.

The distance between two adjacent nodes or two adjacent anti-nodes is equivalent to half the wavelength.

Therefore, in this case the half wavelength is 27.5 cm.

Thus, wavelength = 27.5 × 2

                              = 55 cm

                             <u>= 0.55 m</u>

6 0
3 years ago
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