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Deffense [45]
3 years ago
5

which of the following cannot be increased by using a machine of some kind? work, force, speed, torque

Physics
1 answer:
Lemur [1.5K]3 years ago
8 0

Explanation:

Work cannot be increased by using a machine of some kind.

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A penguin slides at a constant velocity of 1.43 m/s down an icy incline. The incline slopes above the horizontal at an angle of
andrew11 [14]

Answer:

t =1.285  s

Explanation:

u=1.43 m/s

∅=6.47°

We know that  μ(k)=tan∅

F(net)=-f(k)

ma =μ(k)*m*g

a =μ(k)*g   equation 1

v=u+at

0=u+(μ(k)*g*t

Putting values

t=u/(g*tan∅)

t=\frac{1.43}{9.81*tan(6.47)}

t=1.285 s

7 0
3 years ago
Why does venus appear so bright to the naked eye?
Nadusha1986 [10]

Venus is the second planet from the sun. It is usually the brightest object in our sky, other than our sun and moon. At sunrise and sunset, it looks like a big, bright star. It is bright because Venus has a cloud cover that reflects the sunlight. These clouds are made up of gases.

6 0
4 years ago
Consider a space shuttle which has a mass of about 1.0 x 105 kg and circles the Earth at an altitude of about 200.0 km. Calculat
kodGreya [7K]

Answer:

1.6675×10^-16N

Explanation:

The force of gravity that the space shuttle experiences is expressed as;

g = GM/r²

G is the gravitational constant

M is the mass = 1.0 x 10^5 kg

r is the altitude = 200km = 200,000m

Substitute into the formula

g = 6.67×10^-11 × 1.0×10^5/(2×10^5)²

g = 6.67×10^-6/4×10^10

g = 1.6675×10^{-6-10}

g = 1.6675×10^-16N

Hence the force of gravity experienced by the shuttle is 1.6675×10^-16N

7 0
3 years ago
Calculate the p.e. of a 5 kg mass when it is (i) 3 m, (ii) 6 m, above the ground. (g = 10 N/kg)​
Mashcka [7]

Explanation:

P.E=MGH

(1) P.E=5×10(G)×3

= 150 kg m^/s^ ( ^ =sqaure)

(2) P.E=5×10×6

= 300 kg m^/s^

Hope it helps, just remember the formula u can solve any question regarding gravition of earth (P.E=Mgh)

4 0
3 years ago
What is a delta?<br><br><br><br><br><br><br><br><br><br> 20 characters...
Mars2501 [29]

Answer:

A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment.

plz follow me

8 0
3 years ago
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