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JulijaS [17]
3 years ago
14

Momentum has a _____. a. direction only b. magnitude only c. direction and magnitude

Physics
2 answers:
Elina [12.6K]3 years ago
8 0
C. Direction and Magnitude

It is a vector quantity
weeeeeb [17]3 years ago
5 0
Momentum has both direction and magnitude.

It is a vector quantity.

Its formula is =  Mass * Velocity,    Mass you know is associated with size and velocity of course is associated with direction.

C. direction and magnitude
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A wave is moving at the rate of 40 cm/s. Its wavelength is 8 cm. What is the frequency of the wave?
IgorC [24]
Speed = frequency times wavelength.
40=8xf
f = 5 Hz or cycles per second.
5 0
3 years ago
What is the difference between a vigorous sport and vigorous recreation ?
NNADVOKAT [17]

Answer:

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3 years ago
Twin A makes a one way trip at 0.6c to a star 12 light years away while twin B stays on Earth. Each twin sends the other a signa
hram777 [196]

Answer:

8 signals received by twin A during the trip.

Explanation:

Given that,

Distance = 12 light year

Speed = 0.6 c

Time = 1 year

We need to calculate the time by A

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T=t\sqrt{\dfrac{1+\dfrac{v}{c}}{1-\dfrac{v}{c}}}

Put the value into the formula

T=1\sqrt{\dfrac{1+0.6}{1-0.6}}

T=2\ years

Similarly,

The expression for distance cover by A

D=d\sqrt{1-\dfrac{v^2}{c^2}}

D=12\sqrt{1-(0.6)^2}

D=9.6\ ly

We need to calculate the time

Using formula of time

t=\dfrac{D}{v}

t=\dfrac{9.6}{0.6}

t=16\ years

We need to calculate the signals received by twin A

Using formula for number of signals

n=\dfrac{t}{T}

Put the value into the formula

n=\dfrac{16}{2}

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7 0
3 years ago
At the beginning of a unit on forces, Ms. Alton is leading a class discussion asking her students
VMariaS [17]

Answer:

(iv), (v), (vi) would be incorrect.

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(vi) For an object not to move, it means that the net force on the object is zero, and not necessarily that there are no forces acting on the object. For example, an object could be pushed on one side, and be pushed on the other side with an equal force in the opposite direction. The forces would cancel each other and the net force would be zero.

The rest should be correct.

6 0
3 years ago
N discussing engines, the ratio of output work to input work expressed as a percentage is called
djyliett [7]

The ration of output work to input work expressed as a percentage is called <u>Efficiency</u>.

5 0
3 years ago
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