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vekshin1
2 years ago
7

James weighs 67 pounds on Earth. He has a mass of 30 kilograms. Which of the following is true?

Physics
2 answers:
makvit [3.9K]2 years ago
5 0
The answer is C cause you cant change mass :)
morpeh [17]2 years ago
4 0

Answer:

I think its B. James would have a smaller mass on the Moon than he does on Earth.

sorry if i did it wrong

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If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front o
tangare [24]
The correct answer is letter A. 6 millimeters. <span>If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens, the height of the image is 6 millimeters.
</span>
Solution:
18 / x = 12 / 4 
12x = 72
x = 6mm
7 0
2 years ago
_____ is a disorder that results from damage to the brain's motor centers, causing difficulty with motor control so that speech
anygoal [31]

Answer:

Cerebral palsy

Explanation:

Cerebral palsy - it is referred to that disorder which is related to damages that caused permanent disorder in the functioning of body parts.  it affects the proper functioning of muscles thus cause the coordination problem.

it is caused due to abnormalities in the brain that result in the coordination of the body. As it is related to abnormalities in the brain thus it also causes a problem in vision, speaking, hearing, etc

7 0
3 years ago
You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizont
Scilla [17]

Answer:

R_{max} = 51.84 m

Explanation:

When we shoot the dart upwards the time taken by the dart to go straight up and again come back is given as

t = 4.6 s

here we can say

\Delta y = 0 = v_i t + \frac{1}{2}at^2

0 = v_i t - \frac{1}{2}(9.8)t^2

put t = 4.6 s then we have

v_i = 22.54 s

Now in order to find the maximum range we can say

R = \frac{v^2 sin2\theta}{g}

so in order to have maximum range we can say

\theta = 45 degree

R_{max} = \frac{v^2}{g}

R_{max} = \frac{22.54^2}{9.8}

R_{max} = 51.84 m

5 0
2 years ago
What centripetal force is needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s
liq [111]

Answer:

We conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.

Explanation:

Given

  • Mass m = 7 kg
  • Radius r = 4 m
  • Velocity v = 15m/s

To determine

We need to determine the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s.

We know a centripetal force acts on a body to keep it moving along a curved path.

We can determine the centripetal force using the formula

F_c=\frac{mv^2}{r}

where

  • m is the mass
  • v is the velocity
  • r is the radius
  • F_c is the centripetal force

substitute m = 7, r = 4, and v = 15 in the formula

F_c=\frac{mv^2}{r}

F_c=\frac{7\left(15\right)^2}{4}

F_c=\frac{1575}{4}

F_c=393.75 N

Therefore, we conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.

7 0
3 years ago
Jump to Question: Which of these is not required for current to flow through a conductor? A. Source of electrical current B. Som
amid [387]
I believe it is D. something with air molecules
7 0
3 years ago
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