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3 years ago

Complete the statement below with all that apply.

Physics

2 answers:

Gre4nikov [31]3 years ago

7 0

Answer: b the slope of a velocity vs. time graph

d. .a vector

Explanation: Acceleration is the rate of change of velocity with time. Slope of the graph of any quantity plotted against time gives the rate of change of that quantity with respect to time. In case of velocity, the slope gives the rate of change of velocity with time which is acceleration.

Acceleration is a vector quantity because it has both magnitude and direction. and is measured in $ms^{-2}$

The change in displacement divided by the change in time gives velocity. Velocity is measured in m/s.

lianna [129]3 years ago

3 0

Acceleration is the rate of change of velocity, and velocity is the change in displacement over the change in time so the answer would be A.

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Local environmental change have no effect on the global climate true or false

Otrada [13]

Answer:

false

Explanation:

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The tidal bulge on the side of the earth opposite the moon is due to _______ .

butalik [34]

Due to the moon's gravitational force and inertias counterbalance.

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3 years ago

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How much heat is contained in 100 kg of water at 60.0 °C?

attashe74 [19]

First we need to write down heat capacity for water which is constant.
cp=4186 J/(kg*K)

The equation for Energy that we will be calculating is:

E=cp*m*T
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3 years ago

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 49.0 cm . The explorer finds that

iren2701 [21]

Answer: g = 10.0 m/s/s

Explanation:

For a simple pendulum, provided that the angle between the lowest and highest point of his trajectory be small, the oscillation period is given by the following expression:

T = 2π √L/g , where L = pendulum length, g= accelleration of gravity.

We can also define the period, as the time needed to complete a full swing, so from the measured values, we can conclude the following :

T = 140 sec/ 101 cycles = 1.39 sec

Equating both definitions for T, we can solve for g, as follows:

g = 4 π² L / T² = 4π². 0.49 m / (1.39)² = 10.0 m/s/s

7 0

3 years ago

A person throws a ball straight up in the air. The ball rises to a maximum height and then falls back down so that the person ca

Lana71 [14]

Answer:

The acceleration is about 9.8 m/s2 (down) when the ball is falling.

Explanation:

The ball at maximum height has velocity zero

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s² (positive downward and negative upward)

$v=u+at\\\Rightarrow 0=u-9.8\times t\\\Rightarrow u=9.8t$

The accleration 9.8 m/s² will always be acting on the body in opposite direction when the body is going up and in the same direction when the body is going down. The acceleration on the body will never be zero

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3 years ago