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Sonbull [250]
3 years ago
5

Which of the following is true regarding the speed of earthquake waves?

Physics
1 answer:
Levart [38]3 years ago
4 0

Answer:

p waves travel faster than s waves and surface waves

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A person is pushing a box.The net external force on the 60-kg box is stated to be 90 N. If the force of friction opposing the mo
Trava [24]

Answer:

a = 1 m/s²

Explanation:

given,

mass of the person = 60 Kg

Net External force exerted = 90 N

force of friction opposing the motion = 30 N

acceleration of the box = ?

Net force = External force applied - frictional force

Net force = 90 - 30

net force = 60 N

we know

F = mass x acceleration

60 = 60 x a

a = 1 m/s²

acceleration of the box is equal to a = 1 m/s²

7 0
3 years ago
How do the tension of the cord and the force of gravity affect a pendulum
azamat

The time period of the pendulum is affected by the acceleration due to gravity. The tension does not have any effect on the time period of the pendulum and also the mass of the bob does not effect the time period of the pendulum.

T = 2 \pi \sqrt{\frac{l}{g}}

Hence, if the gravity increases then the time period of the pendulum will decreases and it will swing faster.

5 0
3 years ago
A substance that is made of atoms of more than one type bound together is called a
BigorU [14]
The substance that is made of atoms of more than one type bound together is called an atomic bond or a multi bond
6 0
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An empty 2,500 kg train car is headed northbound at a velocity of 5 m/s. Ahead of the first car, an empty 1,500 kg car is headed
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Let the mass of 2500 kg car be m_1 and it's velocity be v_1 and the mass of 1500 kg car be m_2 and it's velocity be v_2 .

After the bumping the mass be M and it's velocity be V.

     By law of conservation of momentum we have

                   m_1v_1+m_2v_2 = MV

                    2500 * 5 + 1500 * 1=4000 * V

                    V = 14000/4000 = 7/2 = 3.5 m/s

So the velocity of the two-car train = 3.5 m/s

9 0
3 years ago
Identify the type of electrification of the road
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Electrification is widely considered as a viable strategy for reducing the oil dependency and environmental impacts of road transportation. In pursuit of this strategy, most attention has been paid to electric cars. However, substantial, yet untapped, potentials could be realized in urban areas through the large-scale introduction of electric two-wheelers.
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