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irinina [24]
4 years ago
7

An average skater averages 11 m/s over the first 5 seconds of a race. find the average speed required over next 10 seconds to av

erage 12 m/s overall. ​
Physics
1 answer:
Gelneren [198K]4 years ago
6 0

Answer:

usa

Explanation:

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The amount of heat that is needed to raise the temperature of 1
expeople1 [14]

Answer:

a. specific heat

Explanation:

a. specific heat

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3 years ago
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Describe what might happen if Earth’s magnetic field continues to lose strength.
Veronika [31]
The scientists said that the earth magnetic strength keep decreasing then the earth magnetic poles will be reversed and that will force the sun to rise from the west , and this is a great sign that the life on the earth will end to be ready for the hereafter .As God told., So what's the destiny of each of us? This is the big question which every one of us should know its answer.
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3 years ago
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A Block slides down an incline that makes an angle of 30? with the horizontal direction. The coefficient of kinetic friction bet
astraxan [27]

Answer:

Acceleration = 2.35 m/s^{2}

Speed = 8.67 m/s

Explanation:

The coefficient of friction , u =0.3

The angle of incline = 30°

The two forces acting on block are weight and friction.

weight along the incline = mg cos60° = \frac{mg}{2} = 0.5 mg

Friction along incline = umg cos30° = mg 0.3\times \frac{\sqrt{3}}{2}

Friction along incline  = 0.26 mg

Net force acting on the weight = (0.5 - 0.26) mg = 0.24 mg

Acceleration = \frac{net force}{mass} = 0.24 g = 2.35 m/s^{2}

The height of incline = 8 m

Length of the inclined edge = 16 m

v^{2}=u^{2}+2as

v^{2}= 2\times 0.24 \times 9.8\times 16

v= 8.67 m/s

5 0
4 years ago
What are the set of equations called that can be used to quantify motion in the case of uniform acceleration?
KATRIN_1 [288]
The kinematic equations are used to <span>quantify motion in the case of uniform acceleration.

The other name is : SUVAT equations, where the letters signify: 
 displacement (s),
initial velocity (u),
 final velocity (v),
acceleration (a), and
 time (t).

There are three equations are attached in the picture: </span>

7 0
4 years ago
To see if your results are reasonable, you can compare the final velocity of the stone as it falls down unwinding the wire from
pentagon [3]

Answer:

The velocity of the stone is 2.57 m/s.

Explanation:

Given that

Height = 0.337 m

We need to calculate the velocity of the stone

Using equation of motion

v^2-u^2=2gh

Where, v = velocity of stone

u = initial velocity

g = acceleration due to gravity

h = height

Put the value into the formula

v^2-0=2\times9.8\times 0.337

v=\sqrt{2\times9.8\times0.337}

v=2.57\ m/s

Hence, The velocity of the stone is 2.57 m/s.

7 0
4 years ago
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