1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alekssandra [29.7K]
3 years ago
5

Pick one :))) hehe please

Physics
2 answers:
Arte-miy333 [17]3 years ago
8 0

thermal energy is the correct answer of number 7



jasenka [17]3 years ago
6 0

Number 6 is D. Mantle

You might be interested in
Which fossil fuel is used the most for energy production?
algol13
A. Coal is used to primarily to produce and generate electricity and it is responsible for 39 percent of the power supply for the united states.
5 0
3 years ago
When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 2
alexandr402 [8]
I think the answer is twice as much
8 0
2 years ago
A crate resting on a rough horizontal floor is to be moved horizontally. The coefficient of static friction is 0.36. To start th
luda_lava [24]

Answer:

Explanation:

The direction of force will be in upward direction making an angle of θ with the vertical .

Reaction force R = mg - F cosθ

Friction force = μR

= .36 (mg - F cosθ )

Horizontal component of applied force

= F sinθ

For equilibrium

F sinθ = .36 (mg - F cosθ)

F sinθ + .36 F cosθ =.36 mg

F (sinθ + .36 cosθ) = .36 mg

F R( cosδsinθ +sinδ cosθ) = .36 mg ( Rcosδ = 1 . Rsinδ= .36 )

F R sin( θ+δ )  = . 36 mg

F = .36 mg / Rsin( θ+δ )

For minimum F , sin( θ+δ ) should be maximum

sin( θ+ δ ) = sin 90

θ+ δ  = 90

Rsinδ / Rcosδ  = .36

δ = 20⁰

θ = 70⁰ Ans

5 0
3 years ago
Help meeeeeeeeeeeee ill mark brainlist to people
kvasek [131]

Answer: question 1 , would be one question 2 , would be 1 joule and number three would be number one and number four would be , power and last one would be, number two

Explanation: sorry if its wrong

5 0
3 years ago
A ball is thrown directly downward with an initial speed of 7.70 m/s, from a height of 30.2 m. After what time interval does it
KatRina [158]

Answer:

t = 1.82

Explanation:

Given

u = 7.70m/s -- initial velocity

s = 30.2m --- height

Required

Determine the time to hit the ground

This will be solved using the following motion equation.

s = ut + \frac{1}{2}gt^2

Where

g = 9,8m/s^2

So, we have:

30.2 = 7.70t + \frac{1}{2} * 9.8 * t^2

30.2 = 7.70t + 4.9 * t^2

Subtract 30.2 from both sides

30.2 -30.2  = 7.70t + 4.9 * t^2 - 30.2

0  = 7.70t + 4.9 * t^2 - 30.2

0  = 7.70t + 4.9t^2 - 30.2

7.70t + 4.9t^2 - 30.2  = 0

4.9t^2 + 7.70t - 30.2  = 0

Solve using quadratic formula:

t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}

Where

a = 4.9;\ b = 7.70;\ c = -30.2

t = \frac{-7.70\±\sqrt{7.70^2 - 4*4.9*-30.2}}{2*4.9}

t = \frac{-7.70\±\sqrt{651.21}}{9.8}

t = \frac{-7.70\±25.52}{9.8}

Split the expression

t = \frac{-7.70+25.52}{9.8} or t = \frac{-7.70-25.52}{9.8}

t = \frac{17.82}{9.8} or t = -\frac{33.22}{9.8}

Time can't be negative;  So, we have:

t = \frac{17.82}{9.8}

t = 1.82

Hence, the time to hit the ground is 1.82 seconds

7 0
3 years ago
Other questions:
  • an object of 30kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object.
    11·1 answer
  • A body is found in the woods and all you have left to analyze are bones and teeth. Explain what isotopes would be helpful to you
    12·1 answer
  • Raising the temperature of a gas will increase its pressure if the volume of the gas
    7·1 answer
  • If a force of 24 N is applied to an object with a mass of 5 kg, the object will accelerate at _____ m/s2
    12·1 answer
  • Sunlight is a form of electromagnetic energy.
    14·1 answer
  • Which are the basic physical sciences?
    14·2 answers
  • Beginning at the synapse of a neuron, place the events in neuronal signaling in the correct sequence.1. Ion channels bind the li
    9·1 answer
  • I need help with number 7 and 8. Gravity is 10N NOT 9.8N for these problems
    10·1 answer
  • What ate the effects of gravitional force<br>​
    11·1 answer
  • What is the phase of a 20 gram of crystalline when its temperature is 250 degrees clesius
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!