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Shkiper50 [21]
3 years ago
10

_________ liquids and gases exert a buoyant force.

Physics
2 answers:
NikAS [45]3 years ago
7 0

Answer:

Both liquids and gases exert a bouyant force when gravity is acting on them

Eduardwww [97]3 years ago
5 0

Answer:

C. Both

Explanation:

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A force of 8 N is used to drag a chair 2.5 metres across a room. Calculate the work done to move the chair.
NNADVOKAT [17]

Answer:

Explanation:

GIVEN

Force (F) = 8 N

Distance (d) = 2.5 metres

Work done = ?

WE know we have the formula

work done = F * d

Work done = 8 * 2.5

                   = 20 Joule

Hope it helps :)

8 0
4 years ago
Read 2 more answers
A spherical conducting shell has charge Q. A point charge q is placed at the center of the cavity. The charge on the inner surfa
FinnZ [79.3K]

Answer:d

Explanation:

From Gauss law Electric field inside a surface is directly proportional to the charge enclosed in it.

Electric field inside a spherical shell is zero and hence there is no charge inside the spherical shell because q charge induces a -q charge on inside surface of spherical shell.

and to counter it there is q charge on the surface. So total charge outside the surface is Q+q

7 0
3 years ago
Write the function of alcohol in a alcohol thermometer.​
Serhud [2]

Answer:

Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.

8 0
3 years ago
What is the resistance of a bulb of 40w connected in a line of 70v​
olga55 [171]

Answer:

122.5 ohm

Explanation:

Given :

P=40 w

V= 70 V

R=?

Resistance can be calculated as :

P=\frac{V^{2} }{R} \\40=\frac{(70)^{2} }{R}\\40=\frac{4900}{R} \\R=\frac{4900}{40} \\R=122.5 ohm

Therefore, resistance of the bulb will be 122.5 ohm

4 0
3 years ago
When serving a tennis ball, a player hits the ball when its velocity is zero (at the highest point of a vertical toss). The racq
Lilit [14]

Answer:60 gm

Explanation:

Given

initial velocity of ball u=0

Force exerted by racquet F=540 N

time period of force t=5\ ms

final velocity of ball v=45\ m/s

Racquet imparts an impulse to the ball which is given by

J=F\Delta t=\Delta P

J=540\times \Delta t=m(45-0)

m=\frac{540\times 5\times 10^{-3}}{45}

m=60\ gm

8 0
4 years ago
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