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meriva
3 years ago
8

Tired of being chased by a jaguar, you set a trap. Hoping to drop it on the jaguar, you try to push a

Physics
1 answer:
Alenkasestr [34]3 years ago
6 0

Answer: acceleration = 3.27m/s^2

Explanation:

Given that the

Mass M = 44kg

Angle Ø = 15 degree

Coefficient of friction ų = 0.7

Force F = 222N

F - Fr = ma ...... (1)

Where Fr = frictional force

Fr = ųN

N = normal reaction = mg

Fr = ųmgsinØ

Fr = 0.7 × 44 × 9.81 × sin 15

Fr = 78.2N

Substitutes Fr, F and M into equation one.

222 - 78.2 = 44a

143.79 = 44a

Make a the subject of formula

a = 143.79/44

Acceleration a = 3.27 m/s^2

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An 89 kg man drops from rest on a diving board −3.1 m above the surface of the water and comes to rest 0.5 s after reaching the
OLga [1]

To solve this problem we will use the linear motion kinematic equations, for which the change of speed squared with the acceleration and the change of position. The acceleration in this case will be the same given by gravity, so our values would be given as,

m= 89 kg\\x = 3.1 m\\t = 0.5s\\a = g = 9.8m/s^2

Through the aforementioned formula we will have to

v_f^2-v_i^2 = 2ax

The particulate part of the rest, so the final speed would be

v_f^2 = 2gx

v_f=\sqrt{2(9.8)(3.1)}

v_f = 7.79m/s

Now from Newton's second law we know that

F = ma

Here,

m = mass

a = acceleration, which can also be written as a function of velocity and time, then

F = m\frac{dv}{dt}

Replacing we have that,

F = (89)\frac{7.79}{0.5}

F = 1386.62N

Therefore the force that the water exert on the man is 1386.62

3 0
3 years ago
Withe light becomes a spectrum of seven colored lights after passing through a prism
Fiesta28 [93]

True. The 7 colors, also called a rainbow, are red, orange, yellow, green, blue, indigo, and violet. This rainbow is formed because the prism bends the white light and spreads it out into the colors it was made of. If there is more you were looking for, comment here.

8 0
3 years ago
Read 2 more answers
A charge of 6.7 × 10^-15 coulombs is located at a point where its potential energy is 5.6 × 10^-12 joules. What is the electric
natita [175]

Answer:

C. 8.4 × 10^2 volts

Explanation:

The potential energy of a charge is given by:

U=qV

where

q is the magnitude of the charge

V is the electric potential

In this problem, we have

q=6.7\cdot 10^{-15} C is the charge

U=5.6\cdot 10^{-12} J is the potential energy

Re-arranging the formula and using these numbers, we can find the electric potential:

V=\frac{U}{q}=\frac{5.6\cdot 10^{-12} J}{6.7\cdot 10^{-15} C}=835.8 V = 8.4\cdot 10^2 V

4 0
3 years ago
Read 2 more answers
758 j of heat are added to 0.750 kg of copper. how much does its temperature change?(unit=degrees c) PLEASE HELPPPPPPP MEEEEEE
DiKsa [7]

Answer:

2.6^{\circ}C

Explanation:

When a substance is supplied with a certain amount of heat energy, the temperature of the substance increases according to the equation

Q=mC\Delta T

where

m is the mass of the substance

Q is the amount of energy supplied

C is the specific heat of the substance

\Delta T is the temperature change

In this problem:

Q = 758 J is the energy supplied

m = 0.750 kg is the mass of the sample

C=385 J/kg^{\circ}C is the specific heat of copper

Re-arranging the equation, we can find the increase in temperature:

\Delta T=\frac{Q}{mC}=\frac{758}{(0.750)(385)}=2.6^{\circ}C

5 0
3 years ago
Find the ratio of intensities in 4 different sets of red to violet spectral satellites in Raman scattering spectra of CCl4 molec
Vlad1618 [11]

Complete Question

Find the ratio of intensities in 4 different sets of red to violet spectral satellites in Raman scattering spectra of CCl4 molecules at T=27C temperature if corresponding resonant infrared frequencies (equivalent to frequencies of nuclei vibrations) of CCl4 molecule are 217, 315, 457 and 774 cm-1 . (Note: Wavenumber N in cm-1 is defined as N=1/\lambda\  cm^{-1})

Answer:

The ratio of intensities is  I_1 : I_2 : I_3 : I_4 = 217 : 315 : 457 : 774

Explanation:

 From the question we are told that

        The number of sets of satellite is n = 4

        The temperature is  T = 27 ^oC

        The resonant infrared frequencies are f_1 = 217 cm^{-1}

                                                                          f_2 = 315 cm^{-1}

                                                                          f_3 = 457 cm^{-1}

                                                                          f_4 = 774 cm^{-1}

From the question we see that the wave number also has a unit ofcm^{-1} hence  the value of the wave numbers of the molecule are

                                                                            N_1 = 217 cm^{-1}                

                                                                          N_2 = 315 cm^{-1}

                                                                          N_3 = 457 cm^{-1}

                                                                          N_4 = 774 cm^{-1}

Generally intensity is mathematically represented as

             I = \frac{nhc}{A \lambda }

Here we see that  I varies inversely with wavelength  i,.e

         I \ \ \alpha \ \ \frac{1}{\lambda }              

From the question we are told that the wave number is mathematically represented as

         N  = \frac{1}{\lambda }

Therefore

          I \ \ \alpha \ \  N

This implies that  the ratio of intensity in first set to that of second set to that of third set to that of fourth set is  equal to the ratio of the wavenumber in the first set to that of the second set  to that of third set to that of fourth

     This is mathematically represented as

               I_1 : I_2 : I_3 : I_4 = N_1 : N_2 : N_3 : N_4

Substituting values

        I_1 : I_2 : I_3 : I_4 = 217 : 315 : 457 : 774

                     

5 0
3 years ago
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