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Arturiano [62]
3 years ago
7

Which of the following is true? A. If an equal force is applied to two objects, the object with greater mass will accelerate mor

e. B. Acceleration takes place when an unbalanced force acts upon an object. C. When an object is traveling at constant speed and direction, it is accelerating. D. The greater the force that is applied to an object, the less it will accelerate.
Physics
1 answer:
docker41 [41]3 years ago
4 0
B


I hope this helps and have a wonderful day filled with joy!!


<3
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Two horses on opposite sides of a narrow stream are pulling a barge up the stream. Each hors pulls with a force of 720N. The rop
Sonja [21]
For the answer to the question above, each horse's force forms a right angle triangle with the barge and subtends an angle of 60/2 = 30°. The resultant in the direction of the barge's motion is:
Fx = Fcos(∅)
We can multiply this by 2 to find the resultant of both horses.
Fx = 2Fcos(∅)
Fx = 2 x 720cos(30)
Fx = 1247 N
8 0
3 years ago
An airplane moving horizontally at 150 m/s drops a package from an altitude is 490 m. How long does it
Debora [2.8K]

Answer:

640

Explanation:

cause you should just add the 2

5 0
3 years ago
The noble gases can be used to as laser mediums. How is the light from one gas different from light of other gases?
neonofarm [45]

Answer:

light in the UV range.

Explanation:

Noble gases and halogens can combine to form lasers called Excimer, for this to happen the noble gas must be ionized with a high voltage discharge, thus forming a molecule of the type

       

      noble gas (X) + halogen (H) → XH

This molecule is highly unstable and decomposes within a few nanoseconds, emitting light in the UV range.

8 0
3 years ago
In 1976, the SR-71A, flying at 20 km altitude (T = –56 0C), set the official jet-powered aircraft speed record of 3530 km/hr (21
Lapatulllka [165]

To solve this problem we will apply the concepts related to the calculation of the speed of sound, the calculation of the Mach number and finally the calculation of the temperature at the front stagnation point. We will calculate the speed in international units as well as the temperature. With these values we will calculate the speed of the sound and the number of Mach. Finally we will calculate the temperature at the front stagnation point.

The altitude is,

z = 20km

And the velocity can be written as,

V = 3530km/h (\frac{1000m}{1km})(\frac{1h}{3600s})

V = 980.55m/s

From the properties of standard atmosphere at altitude z = 20km temperature is

T = 216.66K

k = 1.4

R = 287 J/kg

Velocity of sound at this altitude is

a = \sqrt{kRT}

a = \sqrt{(1.4)(287)(216.66)}

a = 295.049m/s

Then the Mach number

Ma = \frac{V}{a}

Ma = \frac{980.55}{296.049}

Ma = 3.312

So front stagnation temperature

T_0 = T(1+\frac{k-1}{2}Ma^2)

T_0 = (216.66)(1+\frac{1.4-1}{2}*3.312^2)

T_0 = 689.87K

Therefore the temperature at its front stagnation point is 689.87K

6 0
4 years ago
You are riding your bike to the mall. You travel the first mile in ten minutes. The last mile takes you 15 minutes. This is an e
Valentin [98]
I'm pretty sure it's D. negative acceleration
6 0
3 years ago
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