3 years ago

Plz help... asap I need it

Physics

2 answers:

ehidna [41]3 years ago

7 0

8000 j is the answer

riadik2000 [5.3K]3 years ago

3 0

8000 J is the answer

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astone is thrown upwards with an initial velocity of 25m/s at ange of 30 to the ground. work out the stones horizantal range?

Vadim26 [7]

Explanation:

$R = \dfrac{v_0^2}{g}\sin{2\theta} = \dfrac{(25\:\text{m/s})^2}{9.8\:\text{m/s}^2}\sin{60°}$

$\:\:\:\:=55.2\:\text{m}$

4 0

3 years ago

Susie blows up a balloon. First, she places the balloon in a bucket of ice water. She observes the balloon. She then removes the

Alexus [3.1K]

For number one she is going to observe the contraction of the ballon

For number two she is going to observe the expansion of the ballon

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3 years ago

In physics the word medium means

Nadusha1986 [10]

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the answer is C a material or substance

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3 years ago

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What is the current in a 48 kω resistor with 150 v across it?

AleksandrR [38]

Current = (voltage) / (resistance)

= (150 volts) / (48,000 ohms)

= 3.125 milliamperes

8 0

3 years ago

The star Rho1 Cancri is 57 light-years from the earth and has a mass 0.85 times that of our sun. A planet has been detected in a

s344n2d4d5 [400]

Answer:

82780.42123 m/s

14.45 days

Explanation:

m = Mass of the planet

M = Mass of the star = $0.85\times 1.989\times 10^{30}\ kg=1.69065\times 10^{30}\ kg$

r = Radius of orbit of planet = $0.11\times 149.6\times 10^{9}\ m=16.456\times 10^{9}\ m$

v = Orbital speed

The kinetic and potential energy balance is given by

$\frac{GMm}{r^2}=\frac{mv^2}{r}\\\Rightarrow v=\sqrt{\dfrac{Gm}{r}}\\\Rightarrow v=\sqrt{\dfrac{6.67\times 10^{-11}\times 1.69065\times 10^{30}}{16.456\times 10^{9}}}\\\Rightarrow v=82780.42123\ m/s$

The orbital speed of the star is 82780.42123 m/s

The orbital period is given by

$t=\frac{2\pi r}{v}\\\Rightarrow t=\dfrac{2\pi \times 16.456\times 10^{9}}{82780.42123}\\\Rightarrow t=1249040.48419\ seconds=\dfrac{1249040.48419}{24\times 60\times 60}=14.45\ days$

The orbital period is 14.45 days

5 0

3 years ago